See also:

Vehicle interior
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Do-it-yourself maintenance
Do-it-yourself service precautions If you perform maintenance by yourself, be sure to follow the correct procedures as given in these sections. CAUTION: The engine compartment contains many ...

Emission inspection and maintenance (I/M) progra
Some states have vehicle emission inspection programs which include OBD (On Board Diagnostics) checks. The OBD system monitors the operation of the emission control system.  - If the malfunc ...