Answers.Body: <p>With some Power Functions elements and a few extra pieces, it's pretty easy to turn the Rally Car into an RC car.</p>
  
  <p>Here's a quick demo video of my design in action.</p>
  
  <p><a href="https://www.youtube.com/watch?v=qPtFdTLD7Ms" rel="noreferrer"><img src="https://i.sstatic.net/fTr4A.jpg" alt="enter image description here"></a></p>
  
  <p>And here are the instructions I made for it.</p>
  
  <h1>Required extra pieces</h1>
  
  <p>First you are going to need some extra pieces:</p>
  
  <p><a href="https://i.sstatic.net/SkZh8.jpg" rel="noreferrer"><img src="https://i.sstatic.net/SkZh8.jpg" alt=""></a></p>
  
  <ul>
  <li>Power Functions:
  
  <ul>
  <li><strong>1x</strong> - <a href="https://shop.lego.com/en-US/Power-Functions-Servo-Motor-88004" rel="noreferrer">Servo Motor</a></li>
  <li><strong>1x</strong> - <a href="https://shop.lego.com/en-US/LEGO-Power-Functions-IR-Receiver-8884" rel="noreferrer">IR Receiver</a></li>
  <li><strong>1x</strong> - <a href="https://shop.lego.com/en-US/LEGO-Power-Functions-Battery-Box-8881" rel="noreferrer">Battery Box</a></li>
  <li><strong>1x</strong> - <a href="https://shop.lego.com/en-US/Power-Functions-L-Motor-88003" rel="noreferrer">L-Motor</a> (alternately you can use an <a href="https://shop.lego.com/en-US/LEGO-Power-Functions-M-Motor-8883" rel="noreferrer">M-Motor</a> but it is not as powerful)</li>
  </ul></li>
  <li>Technic:
  
  <ul>
  <li><strong>1x</strong> - <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=32316" rel="noreferrer">5L beam</a></li>
  <li><strong>2x</strong> - <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=41677" rel="noreferrer">2L thin beam</a></li>
  <li><strong>4x</strong> - <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=43093" rel="noreferrer">Axle Pin with Friction Ridges</a></li>
  <li><strong>2x</strong> - <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=4519#T=C" rel="noreferrer">3L axle</a></li>
  </ul></li>
  </ul>
  
  <p>In addition to that, you will need a Power Functions remote, and possibly some extra pieces to build the remote. If you don't have a remote already, there are instructions for one at the end.</p>
  
  <h1>Disassembly</h1>
  
  <p>To add power functions, you will need to disassembly it a bit to remove the engine block and manual steering system.</p>
  
  <ol>
  <li>Remove doors.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/AsIZ4.jpg" rel="noreferrer"><img src="https://i.sstatic.net/AsIZ4.jpg" alt=""></a></p>
  
  <ol start="2">
  <li>Remove roof sides.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/Hzsku.jpg" rel="noreferrer"><img src="https://i.sstatic.net/Hzsku.jpg" alt=""></a></p>
  
  <ol start="3">
  <li>Remove roof gear and pull the blue pins out one step.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/4r1mT.jpg" rel="noreferrer"><img src="https://i.sstatic.net/4r1mT.jpg" alt=""></a></p>
  
  <ol start="4">
  <li>Take the center of the roof off with the front window frame.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/Ufj5N.jpg" rel="noreferrer"><img src="https://i.sstatic.net/Ufj5N.jpg" alt=""></a></p>
  
  <ol start="5">
  <li>Detach the trunk.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/7pHER.jpg" rel="noreferrer"><img src="https://i.sstatic.net/7pHER.jpg" alt=""></a></p>
  
  <ol start="6">
  <li>Detach the hood.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/G0fVD.jpg" rel="noreferrer"><img src="https://i.sstatic.net/G0fVD.jpg" alt=""></a></p>
  
  <ol start="7">
  <li>Remove seats.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/zykyC.jpg" rel="noreferrer"><img src="https://i.sstatic.net/zykyC.jpg" alt=""></a></p>
  
  <ol start="8">
  <li>Remove fire extinguisher.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/nkLlN.jpg" rel="noreferrer"><img src="https://i.sstatic.net/nkLlN.jpg" alt=""></a></p>
  
  <h1>Remove manual steering.</h1>
  
  <p>Removing the steering system is a little tricky, but doable.</p>
  
  <p><a href="https://i.sstatic.net/OZ61f.jpg" rel="noreferrer"><img src="https://i.sstatic.net/OZ61f.jpg" alt=""></a></p>
  
  <ol>
  <li>Locate the place where it attaches to the back.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/T8c20.jpg" rel="noreferrer"><img src="https://i.sstatic.net/T8c20.jpg" alt=""></a></p>
  
  <ol start="2">
  <li>Push up on the grey piece to detach it from the small black pieces, so you can slide it back and remove all the yellow pieces.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/wrZJK.jpg" rel="noreferrer"><img src="https://i.sstatic.net/wrZJK.jpg" alt=""></a></p>
  
  <p>All of these pieces should be removed.</p>
  
  <p><a href="https://i.sstatic.net/p0bHb.jpg" rel="noreferrer"><img src="https://i.sstatic.net/p0bHb.jpg" alt=""></a></p>
  
  <p>Also remove the black and blue pieces that hold it.</p>
  
  <p><a href="https://i.sstatic.net/28STZ.jpg" rel="noreferrer"><img src="https://i.sstatic.net/28STZ.jpg" alt=""></a></p>
  
  <p>After they are removed, the engine block will be easier to remove.</p>
  
  <p><a href="https://i.sstatic.net/FGkYB.jpg" rel="noreferrer"><img src="https://i.sstatic.net/FGkYB.jpg" alt=""></a></p>
  
  <h1>Removing engine block</h1>
  
  <ol>
  <li>On the back, locate this area.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/1O7W4.jpg" rel="noreferrer"><img src="https://i.sstatic.net/1O7W4.jpg" alt=""></a></p>
  
  <ol start="2">
  <li>Partially detach it temporarily.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/HI9L4.jpg" rel="noreferrer"><img src="https://i.sstatic.net/HI9L4.jpg" alt=""></a></p>
  
  <ol start="3">
  <li>Remove the gear and axles.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/qpkxU.jpg" rel="noreferrer"><img src="https://i.sstatic.net/qpkxU.jpg" alt=""></a></p>
  
  <ol start="4">
  <li>Reattach the section.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/SWOJO.jpg" rel="noreferrer"><img src="https://i.sstatic.net/SWOJO.jpg" alt=""></a></p>
  
  <ol start="5">
  <li>From the underside, locate where the engine block attaches at the back.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/sSq2Y.jpg" rel="noreferrer"><img src="https://i.sstatic.net/sSq2Y.jpg" alt=""></a></p>
  
  <ol start="6">
  <li>Push up to detach the engine block and the white pieces and pins that attached it.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/I4e1S.jpg" rel="noreferrer"><img src="https://i.sstatic.net/I4e1S.jpg" alt=""></a></p>
  
  <h1>Check alignment</h1>
  
  <p>At this point, you going to want to make sure the front gear attached to the gear rack for steering is perfectly vertically aligned like so. If not, slide the pin out and adjust it. It needs to be vertical for the servo motor to attach to it.</p>
  
  <p><a href="https://i.sstatic.net/SNf3D.jpg" rel="noreferrer"><img src="https://i.sstatic.net/SNf3D.jpg" alt=""></a></p>
  
  <h1>Locate pieces</h1>
  
  <p>In these sections you removed, you will find some other pieces you will need.</p>
  
  <p><a href="https://i.sstatic.net/qG2Uk.jpg" rel="noreferrer"><img src="https://i.sstatic.net/qG2Uk.jpg" alt=""></a></p>
  
  <p>Disassemble them to find these pieces.</p>
  
  <p><a href="https://i.sstatic.net/hwePY.jpg" rel="noreferrer"><img src="https://i.sstatic.net/hwePY.jpg" alt=""></a></p>
  
  <h1>Add drive motor</h1>
  
  <ol>
  <li>Build this.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/M3ZZj.jpg" rel="noreferrer"><img src="https://i.sstatic.net/M3ZZj.jpg" alt=""></a></p>
  
  <ol start="2">
  <li>From the underside, position it to slide in the back into the differential area.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/b56a9.jpg" rel="noreferrer"><img src="https://i.sstatic.net/b56a9.jpg" alt=""></a></p>
  
  <p>In this area, you are going to need to add the black gear.</p>
  
  <p><a href="https://i.sstatic.net/hAxGQ.jpg" rel="noreferrer"><img src="https://i.sstatic.net/hAxGQ.jpg" alt=""></a></p>
  
  <ol start="3">
  <li>Hold a black gear in place, then slice the axle and motor into the holes.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/3GKJC.jpg" rel="noreferrer"><img src="https://i.sstatic.net/3GKJC.jpg" alt=""></a></p>
  
  <p><a href="https://i.sstatic.net/WtvxY.jpg" rel="noreferrer"><img src="https://i.sstatic.net/WtvxY.jpg" alt=""></a></p>
  
  <h1>Add steering motor</h1>
  
  <ol>
  <li>In the front, flip up this white panel.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/wa6YJ.jpg" rel="noreferrer"><img src="https://i.sstatic.net/wa6YJ.jpg" alt=""></a></p>
  
  <p><a href="https://i.sstatic.net/iMOjm.jpg" rel="noreferrer"><img src="https://i.sstatic.net/iMOjm.jpg" alt=""></a></p>
  
  <ol start="2">
  <li>Slide the dark grey in the gear out one stud.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/JBYee.jpg" rel="noreferrer"><img src="https://i.sstatic.net/JBYee.jpg" alt=""></a></p>
  
  <ol start="3">
  <li>Build this bracket.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/MAzCK.jpg" rel="noreferrer"><img src="https://i.sstatic.net/MAzCK.jpg" alt=""></a></p>
  
  <ol start="4">
  <li>Insert it here, then slide the red pins out one stud.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/nw75n.jpg" rel="noreferrer"><img src="https://i.sstatic.net/nw75n.jpg" alt=""></a></p>
  
  <p><a href="https://i.sstatic.net/xQtI0.jpg" rel="noreferrer"><img src="https://i.sstatic.net/xQtI0.jpg" alt=""></a></p>
  
  <ol start="5">
  <li>Through the seating area, insert the servo motor into the bracket and push the red pins back in.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/tWxIK.jpg" rel="noreferrer"><img src="https://i.sstatic.net/tWxIK.jpg" alt=""></a></p>
  
  <p><a href="https://i.sstatic.net/Egbh4.jpg" rel="noreferrer"><img src="https://i.sstatic.net/Egbh4.jpg" alt=""></a></p>
  
  <ol start="6">
  <li>Now if the axle is correctly aligned, you can just slide the axle into the motor.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/4ylea.jpg" rel="noreferrer"><img src="https://i.sstatic.net/4ylea.jpg" alt=""></a></p>
  
  <ol start="7">
  <li>Flip the panel back down.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/KLADH.jpg" rel="noreferrer"><img src="https://i.sstatic.net/KLADH.jpg" alt=""></a></p>
  
  <h1>Adding Battery Box</h1>
  
  <ol>
  <li>Build the following.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/FEB7w.jpg" rel="noreferrer"><img src="https://i.sstatic.net/FEB7w.jpg" alt=""></a></p>
  
  <ol start="2">
  <li>Slide the batter box into the back here.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/MRVYy.jpg" rel="noreferrer"><img src="https://i.sstatic.net/MRVYy.jpg" alt=""></a></p>
  
  <p><a href="https://i.sstatic.net/9o9QG.jpg" rel="noreferrer"><img src="https://i.sstatic.net/9o9QG.jpg" alt=""></a></p>
  
  <ol start="3">
  <li>On the sides, attach it with the pieces you just built.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/FHT1I.jpg" rel="noreferrer"><img src="https://i.sstatic.net/FHT1I.jpg" alt=""></a></p>
  
  <p><a href="https://i.sstatic.net/e5Ery.jpg" rel="noreferrer"><img src="https://i.sstatic.net/e5Ery.jpg" alt=""></a></p>
  
  <p><a href="https://i.sstatic.net/1mt2k.jpg" rel="noreferrer"><img src="https://i.sstatic.net/1mt2k.jpg" alt=""></a></p>
  
  <h1>Re-assembly</h1>
  
  <ol>
  <li>Reattach seats.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/21LtB.jpg" rel="noreferrer"><img src="https://i.sstatic.net/21LtB.jpg" alt=""></a></p>
  
  <ol start="2">
  <li>Reattach hood.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/p1ngv.jpg" rel="noreferrer"><img src="https://i.sstatic.net/p1ngv.jpg" alt=""></a></p>
  
  <ol start="3">
  <li>Reattach roof center, and slide the blue pins back in.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/PrU9i.jpg" rel="noreferrer"><img src="https://i.sstatic.net/PrU9i.jpg" alt=""></a></p>
  
  <p><a href="https://i.sstatic.net/aQuJo.jpg" rel="noreferrer"><img src="https://i.sstatic.net/aQuJo.jpg" alt=""></a></p>
  
  <ol start="4">
  <li>Reattach the trunk to the blue pins.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/A9bCN.jpg" rel="noreferrer"><img src="https://i.sstatic.net/A9bCN.jpg" alt=""></a></p>
  
  <p><a href="https://i.sstatic.net/MmX5c.jpg" rel="noreferrer"><img src="https://i.sstatic.net/MmX5c.jpg" alt=""></a></p>
  
  <ol start="5">
  <li>Hold the trunk in the up position, and reattach the roof sides.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/wzrj0.jpg" rel="noreferrer"><img src="https://i.sstatic.net/wzrj0.jpg" alt=""></a></p>
  
  <p><a href="https://i.sstatic.net/IPprK.jpg" rel="noreferrer"><img src="https://i.sstatic.net/IPprK.jpg" alt=""></a></p>
  
  <ol start="6">
  <li>Reattach the doors.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/zGzg0.jpg" rel="noreferrer"><img src="https://i.sstatic.net/zGzg0.jpg" alt=""></a></p>
  
  <h1>IR Receiver</h1>
  
  <ol>
  <li>Attach black pins to the receiver, and attach it to the spoiler.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/veqgq.jpg" rel="noreferrer"><img src="https://i.sstatic.net/veqgq.jpg" alt=""></a></p>
  
  <p><a href="https://i.sstatic.net/OcdXB.jpg" rel="noreferrer"><img src="https://i.sstatic.net/OcdXB.jpg" alt=""></a></p>
  
  <ol start="2">
  <li>It's tricky, but run the wire through the crack down to the batter box.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/cWWCb.jpg" rel="noreferrer"><img src="https://i.sstatic.net/cWWCb.jpg" alt=""></a></p>
  
  <p><a href="https://i.sstatic.net/OaGmw.jpg" rel="noreferrer"><img src="https://i.sstatic.net/OaGmw.jpg" alt=""></a></p>
  
  <p><a href="https://i.sstatic.net/gx6f2.jpg" rel="noreferrer"><img src="https://i.sstatic.net/gx6f2.jpg" alt=""></a></p>
  
  <ol start="3">
  <li>Now run the wires from the motors up through that crack, and attach to the IR receiver, servo to blue, engine to red.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/GwxgD.jpg" rel="noreferrer"><img src="https://i.sstatic.net/GwxgD.jpg" alt=""></a></p>
  
  <p><a href="https://i.sstatic.net/Eyg3N.jpg" rel="noreferrer"><img src="https://i.sstatic.net/Eyg3N.jpg" alt=""></a></p>
  
  <h1>Turning the car on.</h1>
  
  <p>Turning the car on/off is as simple as opening the hood and switching the orange switch on the battery box.</p>
  
  <p><a href="https://i.sstatic.net/UgeMl.jpg" rel="noreferrer"><img src="https://i.sstatic.net/UgeMl.jpg" alt=""></a></p>
  
  <h1>Remote</h1>
  
  <p>You can build the following remote with a few extra pieces.</p>
  
  <p><a href="https://i.sstatic.net/QHlfL.jpg" rel="noreferrer"><img src="https://i.sstatic.net/QHlfL.jpg" alt=""></a></p>
  
  <p><a href="https://i.sstatic.net/Ydta2.jpg" rel="noreferrer"><img src="https://i.sstatic.net/Ydta2.jpg" alt=""></a></p>
  
  <ul>
  <li>Power Functions:
  
  <ul>
  <li><strong>1x</strong> - <a href="https://shop.lego.com/en-US/LEGO-Power-Functions-IR-Remote-Control-8885" rel="noreferrer">IR Remote Control</a></li>
  </ul></li>
  <li><p>Technic:</p>
  
  <ul>
  <li><strong>2x</strong> - <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=18651" rel="noreferrer">Axle Pin 3L with Friction Ridges</a></li>
  <li><strong>2x</strong> - <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=32013" rel="noreferrer">Axle and Pin Connector Angled #1</a></li>
  <li><strong>2x</strong> - <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=32062" rel="noreferrer">Axle 2L</a></li>
  <li><strong>1x</strong> - <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=2825" rel="noreferrer">Liftarm 1 x 4 Thin with Stud Connector</a> (or the version without the stud connector)</li>
  <li><p><strong>1x</strong> - <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=56145" rel="noreferrer">Wheel 30.4mm D. x 20mm</a> (or some other wheel rim)</p>
  
  <ol>
  <li>Build sticks.</li>
  </ol></li>
  </ul></li>
  </ul>
  
  <p><a href="https://i.sstatic.net/CPGj8.jpg" rel="noreferrer"><img src="https://i.sstatic.net/CPGj8.jpg" alt=""></a></p>
  
  <ol start="2">
  <li>Attach sticks.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/0DaAH.jpg" rel="noreferrer"><img src="https://i.sstatic.net/0DaAH.jpg" alt=""></a></p>
  
  <ol start="3">
  <li>Build arm.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/j78wi.jpg" rel="noreferrer"><img src="https://i.sstatic.net/j78wi.jpg" alt=""></a></p>
  
  <ol start="4">
  <li>Attach arm.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/wsfzf.jpg" rel="noreferrer"><img src="https://i.sstatic.net/wsfzf.jpg" alt=""></a></p>
  
  <ol start="5">
  <li>Attach wheel.</li>
  </ol>
  
  <p><a href="https://i.sstatic.net/IXQKP.jpg" rel="noreferrer"><img src="https://i.sstatic.net/IXQKP.jpg" alt=""></a></p>
  
  <p>Happy building!</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-06-19T11:20:39.040Z
Answers.Text: This is FANTASTIC
Answers.UserDisplayName: Phil B.
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-06-19T14:54:41.193Z
Answers.Text: Great writeup! This is thorough and beautiful. Nice work!
Answers.UserDisplayName: jncraton
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-11-07T00:50:21.640Z
Answers.Text: Nice work and write up! I would suggest popping out the steering limiters on the steering rack as well. Much better turning radius without them.
Answers.UserDisplayName: Tom H.
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-06-19T05:03:31.193Z
Answers.LastActivityDate: 2018-06-19T06:56:38.283Z
Answers.LastEditDate: 2018-06-19T06:56:38.283Z
Answers.UserDisplayName: Alexander O'Mara
Body: <p>The new <a href="https://shop.lego.com/en-US/Rally-Car-42077" rel="noreferrer">42077 Technic Rally Car set</a> looks really nice, and even has a built-in steering system which can be controlled by a gear on the top. There's also a fair bit of extra room inside, is there a way to add Power Functions elements to make it remote controlled?</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2018-06-19T11:18:11.720Z
Comments.Text: Please add the “Annual-support” tag :)
Comments.UserDisplayName: Phil B.
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2018-06-19T12:05:18.527Z
Comments.Text: @PhilB. I've added that in.
Comments.UserDisplayName: Zhaph - Ben Duguid
Tags: <technic><power-functions><annual-support><alternate-model>
Title: How can I motorize 42077 Technic Rally Car with LEGO Power Functions?
UserDisplayName: Alexander O'Mara
ThreadText: # How can I motorize 42077 Technic Rally Car with LEGO Power Functions?
  
  (Asked by: username_0 on 2018-06-19)
  
  The new [42077 Technic Rally Car set](https://shop.lego.com/en-US/Rally-Car-42077) looks really nice, and even has a built-in steering system which can be controlled by a gear on the top. There's also a fair bit of extra room inside, is there a way to add Power Functions elements to make it remote controlled?
  
  **Tags:** technic, power-functions, annual-support, alternate-model
  
  > **Comments:**
  > **username_1**: Please add the “Annual-support” tag :)  
  > **username_2**: @PhilB. I've added that in.  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_0 on 2018-06-19. Score: 17 | Accepted answer
  
  With some Power Functions elements and a few extra pieces, it's pretty easy to turn the Rally Car into an RC car.
  
  Here's a quick demo video of my design in action.
  
  [![enter image description here](https://i.sstatic.net/fTr4A.jpg)](https://www.youtube.com/watch?v=qPtFdTLD7Ms)
  
  And here are the instructions I made for it.
  
  # Required extra pieces
  
  First you are going to need some extra pieces:
  
  [![](https://i.sstatic.net/SkZh8.jpg)](https://i.sstatic.net/SkZh8.jpg)
  
  * Power Functions:
    + **1x** - [Servo Motor](https://shop.lego.com/en-US/Power-Functions-Servo-Motor-88004)
    + **1x** - [IR Receiver](https://shop.lego.com/en-US/LEGO-Power-Functions-IR-Receiver-8884)
    + **1x** - [Battery Box](https://shop.lego.com/en-US/LEGO-Power-Functions-Battery-Box-8881)
    + **1x** - [L-Motor](https://shop.lego.com/en-US/Power-Functions-L-Motor-88003) (alternately you can use an [M-Motor](https://shop.lego.com/en-US/LEGO-Power-Functions-M-Motor-8883) but it is not as powerful)
  * Technic:
    + **1x** - [5L beam](https://www.bricklink.com/v2/catalog/catalogitem.page?P=32316)
    + **2x** - [2L thin beam](https://www.bricklink.com/v2/catalog/catalogitem.page?P=41677)
    + **4x** - [Axle Pin with Friction Ridges](https://www.bricklink.com/v2/catalog/catalogitem.page?P=43093)
    + **2x** - [3L axle](https://www.bricklink.com/v2/catalog/catalogitem.page?P=4519#T=C)
  
  In addition to that, you will need a Power Functions remote, and possibly some extra pieces to build the remote. If you don't have a remote already, there are instructions for one at the end.
  
  # Disassembly
  
  To add power functions, you will need to disassembly it a bit to remove the engine block and manual steering system.
  
  1. Remove doors.
  
  [![](https://i.sstatic.net/AsIZ4.jpg)](https://i.sstatic.net/AsIZ4.jpg)
  
  2. Remove roof sides.
  
  [![](https://i.sstatic.net/Hzsku.jpg)](https://i.sstatic.net/Hzsku.jpg)
  
  3. Remove roof gear and pull the blue pins out one step.
  
  [![](https://i.sstatic.net/4r1mT.jpg)](https://i.sstatic.net/4r1mT.jpg)
  
  4. Take the center of the roof off with the front window frame.
  
  [![](https://i.sstatic.net/Ufj5N.jpg)](https://i.sstatic.net/Ufj5N.jpg)
  
  5. Detach the trunk.
  
  [![](https://i.sstatic.net/7pHER.jpg)](https://i.sstatic.net/7pHER.jpg)
  
  6. Detach the hood.
  
  [![](https://i.sstatic.net/G0fVD.jpg)](https://i.sstatic.net/G0fVD.jpg)
  
  7. Remove seats.
  
  [![](https://i.sstatic.net/zykyC.jpg)](https://i.sstatic.net/zykyC.jpg)
  
  8. Remove fire extinguisher.
  
  [![](https://i.sstatic.net/nkLlN.jpg)](https://i.sstatic.net/nkLlN.jpg)
  
  # Remove manual steering.
  
  Removing the steering system is a little tricky, but doable.
  
  [![](https://i.sstatic.net/OZ61f.jpg)](https://i.sstatic.net/OZ61f.jpg)
  
  1. Locate the place where it attaches to the back.
  
  [![](https://i.sstatic.net/T8c20.jpg)](https://i.sstatic.net/T8c20.jpg)
  
  2. Push up on the grey piece to detach it from the small black pieces, so you can slide it back and remove all the yellow pieces.
  
  [![](https://i.sstatic.net/wrZJK.jpg)](https://i.sstatic.net/wrZJK.jpg)
  
  All of these pieces should be removed.
  
  [![](https://i.sstatic.net/p0bHb.jpg)](https://i.sstatic.net/p0bHb.jpg)
  
  Also remove the black and blue pieces that hold it.
  
  [![](https://i.sstatic.net/28STZ.jpg)](https://i.sstatic.net/28STZ.jpg)
  
  After they are removed, the engine block will be easier to remove.
  
  [![](https://i.sstatic.net/FGkYB.jpg)](https://i.sstatic.net/FGkYB.jpg)
  
  # Removing engine block
  
  1. On the back, locate this area.
  
  [![](https://i.sstatic.net/1O7W4.jpg)](https://i.sstatic.net/1O7W4.jpg)
  
  2. Partially detach it temporarily.
  
  [![](https://i.sstatic.net/HI9L4.jpg)](https://i.sstatic.net/HI9L4.jpg)
  
  3. Remove the gear and axles.
  
  [![](https://i.sstatic.net/qpkxU.jpg)](https://i.sstatic.net/qpkxU.jpg)
  
  4. Reattach the section.
  
  [![](https://i.sstatic.net/SWOJO.jpg)](https://i.sstatic.net/SWOJO.jpg)
  
  5. From the underside, locate where the engine block attaches at the back.
  
  [![](https://i.sstatic.net/sSq2Y.jpg)](https://i.sstatic.net/sSq2Y.jpg)
  
  6. Push up to detach the engine block and the white pieces and pins that attached it.
  
  [![](https://i.sstatic.net/I4e1S.jpg)](https://i.sstatic.net/I4e1S.jpg)
  
  # Check alignment
  
  At this point, you going to want to make sure the front gear attached to the gear rack for steering is perfectly vertically aligned like so. If not, slide the pin out and adjust it. It needs to be vertical for the servo motor to attach to it.
  
  [![](https://i.sstatic.net/SNf3D.jpg)](https://i.sstatic.net/SNf3D.jpg)
  
  # Locate pieces
  
  In these sections you removed, you will find some other pieces you will need.
  
  [![](https://i.sstatic.net/qG2Uk.jpg)](https://i.sstatic.net/qG2Uk.jpg)
  
  Disassemble them to find these pieces.
  
  [![](https://i.sstatic.net/hwePY.jpg)](https://i.sstatic.net/hwePY.jpg)
  
  # Add drive motor
  
  1. Build this.
  
  [![](https://i.sstatic.net/M3ZZj.jpg)](https://i.sstatic.net/M3ZZj.jpg)
  
  2. From the underside, position it to slide in the back into the differential area.
  
  [![](https://i.sstatic.net/b56a9.jpg)](https://i.sstatic.net/b56a9.jpg)
  
  In this area, you are going to need to add the black gear.
  
  [![](https://i.sstatic.net/hAxGQ.jpg)](https://i.sstatic.net/hAxGQ.jpg)
  
  3. Hold a black gear in place, then slice the axle and motor into the holes.
  
  [![](https://i.sstatic.net/3GKJC.jpg)](https://i.sstatic.net/3GKJC.jpg)
  
  [![](https://i.sstatic.net/WtvxY.jpg)](https://i.sstatic.net/WtvxY.jpg)
  
  # Add steering motor
  
  1. In the front, flip up this white panel.
  
  [![](https://i.sstatic.net/wa6YJ.jpg)](https://i.sstatic.net/wa6YJ.jpg)
  
  [![](https://i.sstatic.net/iMOjm.jpg)](https://i.sstatic.net/iMOjm.jpg)
  
  2. Slide the dark grey in the gear out one stud.
  
  [![](https://i.sstatic.net/JBYee.jpg)](https://i.sstatic.net/JBYee.jpg)
  
  3. Build this bracket.
  
  [![](https://i.sstatic.net/MAzCK.jpg)](https://i.sstatic.net/MAzCK.jpg)
  
  4. Insert it here, then slide the red pins out one stud.
  
  [![](https://i.sstatic.net/nw75n.jpg)](https://i.sstatic.net/nw75n.jpg)
  
  [![](https://i.sstatic.net/xQtI0.jpg)](https://i.sstatic.net/xQtI0.jpg)
  
  5. Through the seating area, insert the servo motor into the bracket and push the red pins back in.
  
  [![](https://i.sstatic.net/tWxIK.jpg)](https://i.sstatic.net/tWxIK.jpg)
  
  [![](https://i.sstatic.net/Egbh4.jpg)](https://i.sstatic.net/Egbh4.jpg)
  
  6. Now if the axle is correctly aligned, you can just slide the axle into the motor.
  
  [![](https://i.sstatic.net/4ylea.jpg)](https://i.sstatic.net/4ylea.jpg)
  
  7. Flip the panel back down.
  
  [![](https://i.sstatic.net/KLADH.jpg)](https://i.sstatic.net/KLADH.jpg)
  
  # Adding Battery Box
  
  1. Build the following.
  
  [![](https://i.sstatic.net/FEB7w.jpg)](https://i.sstatic.net/FEB7w.jpg)
  
  2. Slide the batter box into the back here.
  
  [![](https://i.sstatic.net/MRVYy.jpg)](https://i.sstatic.net/MRVYy.jpg)
  
  [![](https://i.sstatic.net/9o9QG.jpg)](https://i.sstatic.net/9o9QG.jpg)
  
  3. On the sides, attach it with the pieces you just built.
  
  [![](https://i.sstatic.net/FHT1I.jpg)](https://i.sstatic.net/FHT1I.jpg)
  
  [![](https://i.sstatic.net/e5Ery.jpg)](https://i.sstatic.net/e5Ery.jpg)
  
  [![](https://i.sstatic.net/1mt2k.jpg)](https://i.sstatic.net/1mt2k.jpg)
  
  # Re-assembly
  
  1. Reattach seats.
  
  [![](https://i.sstatic.net/21LtB.jpg)](https://i.sstatic.net/21LtB.jpg)
  
  2. Reattach hood.
  
  [![](https://i.sstatic.net/p1ngv.jpg)](https://i.sstatic.net/p1ngv.jpg)
  
  3. Reattach roof center, and slide the blue pins back in.
  
  [![](https://i.sstatic.net/PrU9i.jpg)](https://i.sstatic.net/PrU9i.jpg)
  
  [![](https://i.sstatic.net/aQuJo.jpg)](https://i.sstatic.net/aQuJo.jpg)
  
  4. Reattach the trunk to the blue pins.
  
  [![](https://i.sstatic.net/A9bCN.jpg)](https://i.sstatic.net/A9bCN.jpg)
  
  [![](https://i.sstatic.net/MmX5c.jpg)](https://i.sstatic.net/MmX5c.jpg)
  
  5. Hold the trunk in the up position, and reattach the roof sides.
  
  [![](https://i.sstatic.net/wzrj0.jpg)](https://i.sstatic.net/wzrj0.jpg)
  
  [![](https://i.sstatic.net/IPprK.jpg)](https://i.sstatic.net/IPprK.jpg)
  
  6. Reattach the doors.
  
  [![](https://i.sstatic.net/zGzg0.jpg)](https://i.sstatic.net/zGzg0.jpg)
  
  # IR Receiver
  
  1. Attach black pins to the receiver, and attach it to the spoiler.
  
  [![](https://i.sstatic.net/veqgq.jpg)](https://i.sstatic.net/veqgq.jpg)
  
  [![](https://i.sstatic.net/OcdXB.jpg)](https://i.sstatic.net/OcdXB.jpg)
  
  2. It's tricky, but run the wire through the crack down to the batter box.
  
  [![](https://i.sstatic.net/cWWCb.jpg)](https://i.sstatic.net/cWWCb.jpg)
  
  [![](https://i.sstatic.net/OaGmw.jpg)](https://i.sstatic.net/OaGmw.jpg)
  
  [![](https://i.sstatic.net/gx6f2.jpg)](https://i.sstatic.net/gx6f2.jpg)
  
  3. Now run the wires from the motors up through that crack, and attach to the IR receiver, servo to blue, engine to red.
  
  [![](https://i.sstatic.net/GwxgD.jpg)](https://i.sstatic.net/GwxgD.jpg)
  
  [![](https://i.sstatic.net/Eyg3N.jpg)](https://i.sstatic.net/Eyg3N.jpg)
  
  # Turning the car on.
  
  Turning the car on/off is as simple as opening the hood and switching the orange switch on the battery box.
  
  [![](https://i.sstatic.net/UgeMl.jpg)](https://i.sstatic.net/UgeMl.jpg)
  
  # Remote
  
  You can build the following remote with a few extra pieces.
  
  [![](https://i.sstatic.net/QHlfL.jpg)](https://i.sstatic.net/QHlfL.jpg)
  
  [![](https://i.sstatic.net/Ydta2.jpg)](https://i.sstatic.net/Ydta2.jpg)
  
  * Power Functions:
    + **1x** - [IR Remote Control](https://shop.lego.com/en-US/LEGO-Power-Functions-IR-Remote-Control-8885)
  * Technic:
  
    + **2x** - [Axle Pin 3L with Friction Ridges](https://www.bricklink.com/v2/catalog/catalogitem.page?P=18651)
    + **2x** - [Axle and Pin Connector Angled #1](https://www.bricklink.com/v2/catalog/catalogitem.page?P=32013)
    + **2x** - [Axle 2L](https://www.bricklink.com/v2/catalog/catalogitem.page?P=32062)
    + **1x** - [Liftarm 1 x 4 Thin with Stud Connector](https://www.bricklink.com/v2/catalog/catalogitem.page?P=2825) (or the version without the stud connector)
    + **1x** - [Wheel 30.4mm D. x 20mm](https://www.bricklink.com/v2/catalog/catalogitem.page?P=56145) (or some other wheel rim)
  
      1. Build sticks.
  
  [![](https://i.sstatic.net/CPGj8.jpg)](https://i.sstatic.net/CPGj8.jpg)
  
  2. Attach sticks.
  
  [![](https://i.sstatic.net/0DaAH.jpg)](https://i.sstatic.net/0DaAH.jpg)
  
  3. Build arm.
  
  [![](https://i.sstatic.net/j78wi.jpg)](https://i.sstatic.net/j78wi.jpg)
  
  4. Attach arm.
  
  [![](https://i.sstatic.net/wsfzf.jpg)](https://i.sstatic.net/wsfzf.jpg)
  
  5. Attach wheel.
  
  [![](https://i.sstatic.net/IXQKP.jpg)](https://i.sstatic.net/IXQKP.jpg)
  
  Happy building!
  
  > **Comments:**
  > **username_1**: This is FANTASTIC  
  > **username_3**: Great writeup! This is thorough and beautiful. Nice work!  
  > **username_4**: Nice work and write up! I would suggest popping out the steering limiters on the steering rack as well. Much better turning radius without them.  
  
  ---
  
  