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Saab 9-5 Rough Idle

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

What are common reasons my Saab 9-5 has a rough idle?

While there are a variety of reasons your Saab 9-5 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.
34%
of the time it's
Vacuum Leak
21%
of the time it's
Spark Plugs
15%
of the time it's
Ignition Coil

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Related Saab 9-5 Questions

See what others are asking about their Saab 9-5. Get answers from RepairPal's community of auto experts and enthusiasts.
car idles rough (car shakes) when at stop and still in gear. can this be fixed?

Related Saab 9-5 Problems

Find the most common driver-reported problems that are to blame when a Saab 9-5 has a rough idle.
The check engine light may come on because the electronic throttle body has failed. other symptoms include loss of ac...
The direct ignition cassette can fail causing the engine to die while driving, and/or it will crank but not start. th...
Saab 9-5 Repairs and Prices
All costs based on RepairPal Fair Price Estimate™ averages. Actual prices may change depending on final diagnosis.

Saab 9-5 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