BMW 325i Rough Idle

Learn if it's a simple fix or time to seek out a trusted technician.

What are common reasons my BMW 325i has a rough idle?

While there are a variety of reasons your BMW 325i has a rough idle, the most common 3 are a vacuum leak, an issue with the spark plugs, or a problem with the ignition coil.
of the time it's
Vacuum Leak
of the time it's
Spark Plugs
of the time it's
Ignition Coil

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Related BMW 325i Questions

See what others are asking about their BMW 325i. Get answers from RepairPal's community of auto experts and enthusiasts.
My car idles rough and black smoke with high rpm .its a stick shift so it bucks at will due to bad rpm.
Once the car start it runs fine and after about 10 minutes it starts run rough and shuts off. changed icv, mass airfl...

Related BMW 325i Problems

Find the most common driver-reported problems that are to blame when a BMW 325i has a rough idle.
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BMW 325i Repairs and Prices
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BMW 325i Rough Idle Repair Symptoms

A failing ignition coil will create misfires in the engine, and lead to hesitation, extreme power loss, engine stalling, poor fuel mileage, and illumination of the check engine ...Read More
As we discussed, spark plugs are necessary for any gasoline engine to run. When they fail, the engine is in a constant state of attempting to ignite air and fuel, but cannot. Th...Read More