What could an oil leak from a BMW X5 mean?

I just had an AA test for a 2006 BMW X5 with a view to purchase. The oral report from the AA tester noted oil around the transmission. I have yet to receive the written report but what could the oil be a sign of?

Paul Foxton (Dublin)

Aug 2012 Filed under: fault

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Expert answer

Hi Paul,

Without seeing the car for ourselves it's hard to say for sure. The gearbox itself could be leaking oil somehow, though it may also mean the failure of the rear crankshaft oil seal on the engine. Both of those are likely to be expensive repairs so make sure you get to the bottom of it before you buy the car.

Let us know how you get on.

Shane O' Donoghue - Complete Car Adviser
@Shane_O_D