2005 BMW 525i Touring - Answered Questions & Fixed issues
What engine is in 2003 525l bmw?
There was more than one engine available for that car. You will need a copy of the original registration document. You could also look for the engine code on the engine block. But the paperwork (V5 in the UK, Pink slip in the USA), is the easiest way to do it.
Why is engine M54 E60 misfiring at idle?
Try changing the spark plug/ignition coil to a different cylinder and see what happens. Compression test would be a good idea. A common problem is the boot at the throttle body cracking but vacuum leaks can be hard to find, sometimes it's a good idea to someone else take a look.
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