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      02-10-2013, 07:26 PM   #2319

Drives: E93 325i
Join Date: Feb 2013
Location: Berkshire

iTrader: (0)

I have a late 2007 E93 325i auto with the N53 engine.

A few months back I noticed a slightly irritating ticking noise which becomes more prominent on acceleration. I've not had any error codes or loss of performance, so I just put up with it.

Curiosity got the better of me so I started looking into it and came across this thread. There was a recommendation for the N52 engine to rev to 2500rpm for 3 minutes while stationery. Even though I have the N53 I thought I'd give it a go.

After about 2 and a half minutes there was a noticeable change in rev noise and the ticks went away! But disappointingly they returned a day later. I thought I'd try it again this evening and once again the ticking has stopped.

What's wrong with my car? I have the extended BMW warranty (UK), is this problem likely to be covered under warranty?

I'm reluctant to pay the extortionate diagnostic fee!