How To Diagnose BMW Engine Noise

Most noises from your BMW are the harmless notes of a fully functioning vehicle. Plastic and metal bits from your BMW’s body bump and squeak as they rub together, tires hum against asphalt, wind whooshes past windows, and your engine creates an endless buzz that grows barely noticeable over time.

Most BMW owners know, however, that all sounds coming from your car – especially from the engine – aren’t so harmless. Any noticeable thumping, banging, clicking, squealing or other odd sounds from your engine could indicate a serious problem. If ignored, these underlying problems could lead to major engine damage or failure – both of which pose a threat to your safety and can result in a breakdown. Prevent costly engine repairs and replacement by bringing your BMW to a certified BMW technician at the first sign of these common noises:

Grinding/Screeching: If you hear these noises when turning on your engine it could point to a worn drive belt or pulley.

Hissing or Sizzling: Usually heard after the engine is turned off, these sounds could indicate coolant or oil leaking into the heated part of the engine, a crack in the vacuum line, or an overheating engine.

Knocking/Rough Running: This is one of the most common engine sounds that indicates an issue with ignition coils, spark plugs, and valve gear, or even piston rings and connecting rods.

Whirring: Heard deep within the engine, these sounds indicate an issue with water pump, power steering pump or alternator. If you hear this noise start by checking power steering fluid levels and fill if needed. If the problem still persists, visit a BMW technician for further inspection.

Boston Motor Werks is the local independent BMW specialist you can count on for dealership quality service, maintenance, and repair for all models of BMW. Our certified master technicians are experienced in diagnosing a wide variety of engine sounds and offer complete repair at affordable prices. At the first sign of any strange engine noises, call us at 617-489-0291 or fill out our online form to make an appointment.


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