Does the older BMW 3 Series have an oil leak issue?

Hi,

I am looking at buying a 2007 BMW 320i Coupé (Manual) or a 2007 BMW 320i SE Coupé (Automatic). Both have 44,000 miles on the clock. My old car, a 2002 BMW 318Ci eventually gave up due to the engine leaking oil constantly. A mechanic friend of mine has advised against buying another 3 Series as he says this oil problem is an ongoing fault with the model. I would be interested in knowing if such is the case?

Thanks,

Denis, Dublin

Denis Hartnett (Dublin)

Aug 2013 Filed under: fault

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Expert answer

Hi Denis,

Yes, it seems to be a recurring problem on the 320i, but it may not be as serious as you think. If the source of the leak is the crank-case ventilator (CCV) then it can be a bit pricey to get fixed, and it's most definitely not a DIY job, as bits of the engine have to be removed and the whole assembly tilted to allow access.

If though, the leak is coming from the vacuum pump then it's most likely simply a failed o-ring seal on the pump, which can be relatively easily replaced. The obvious signs of a leak are a smell of burning oil in the cabin at tickover and, of course, visible oil leaks within the engine bay. A quick steam-clean of the engine will show up easily where any leaks are coming from.

Of course, if you've not comfortable tackling this sort of thing yourself make sure you bring the car to a professional.

Neil Briscoe - Complete Car Adviser
@neilmbriscoe