Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_9 (engine_code VARCHAR, model VARCHAR)

### Question ###
What is the engine code for the model  xdrive35i?

### Accurate SQL ###

SELECT engine_code FROM table_name_9 WHERE model = "xdrive35i"