See also:

Engine compartment, overview
The appearance of the engine compartment may vary depending on engine model. 1 Coolant expansion tank 2 Power steering fluid reservoir 3 Engine oil dipstick 4 Radiator 5 Filler cap for engine ...

Three-way catalytic converter
• Keep your engine properly tuned. Certain engine malfunctions, particularly involving the electrical, fuel or distributor ignition systems, may cause unusually high threeway catalytic convert ...

Unleaded fuel
Each Volvo has a three-way catalytic converter and must use only unleaded gasoline. U.S. and Canadian regulations require that pumps delivering unleaded gasoline be labeled "UNLEADED". O ...