Mini Cooper engine oil leaks from oil cooler O-rings, oil pan gasket, and rear main seal on Mini Cooper

Submitted by bmdouble · Jun 23, 2025
Published by RepairPal

Problem overview

Some Mini Cooper owners report experiencing engine oil leaks from several common sources, including the oil cooler O-rings, which can dry and crack over time, leading to oil and coolant spattering onto the exhaust manifold and causing smoke when the engine heats up. Additionally, issues with the oil pan gasket may result in oil seepage if it is damaged or worn out. Furthermore, some owners may face leaks from the rear main seal, which can compromise the integrity of the engine and lead to oil leaking from the rear. Addressing these potential sources of oil leaks is essential to prevent further issues and maintain the vehicle's proper functioning. It is advisable for owners to have these components inspected and repaired by a qualified mechanic if they suspect any of these problems.

4 people reported this problem
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Mini Cooper vehicles with this problem

Average mileage: 101,000 miles
(100,000 - 103,000)

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