What Causes BMW N52 Engine to Shake at Idle?

[NicoleRose]

BMW N52 engine shaking at idle is caused by excessive carbon buildup in the intake tract or cylinder misfire. Below are detailed explanations of the specific causes: Severe engine carbon deposits: Engine carbon buildup is the primary cause of vehicle shaking. When there's excessive carbon accumulation inside the engine, the gasoline sprayed by the cold-start fuel injectors gets largely absorbed by the carbon deposits, resulting in an overly lean air-fuel mixture during cold starts and making cold starts more difficult. Ignition system malfunction: If spark plugs have excessive carbon buildup or excessively large electrode gaps, they need replacement. The working condition of high-voltage wires and ignition coils can be diagnosed using automotive computer diagnostics to determine the ignition system's status.