EXCESSIVE CARBON BUILD UP ON ENGINE INTAKE PORTS AT 35K MILES. CAR PURCHASED NEW, HAS OIL CHANGES BY DEALER EVERY 5K MILES, AND IS FILLED WITH 92 OCTANE GAS. LOTS OF PEOPLE POSTED ON INTERNET OVER LAST 7-8 YEARS THAT MINIS ARE PRONE TO THIS ISSUE AND BMW HASN'T RESOLVED IT. WHEN ASKED IF THIS SHOULD BE ROUTINE MAINTENANCE, IF THIS WAS DRIVING OR FUEL ISSUES, DEALER SAID NONE OF THE ABOVE. YET RESO…
2015 mini Cooper Convertible engine problems
moderate 10 complaints filed with NHTSA · avg repair $3,100
Complaints
10
Recalls
0
Crashes
0
Avg fix
$3,100
What owners are reporting 3 most recent
I TOOK MY 2015 MINI IN FOR ITS LAST SERVICE BEFORE CONVERTING MY LEASE INTO A FINANCING DEAL AND PURCHASING CAR. I WAS INFORMED THERE WAS AN ENGINE RECALL DUE TO CRANKSHAFT BEARING PROBLEM. THEY HAVE KNOW ABOUT THIS ISSUE FOR 2 YEARS YET NEVER INFORMED ME. MY DEALER SAYS THEY HAVE DONE HUNDREDS OF ENGINE REPLACEMENTS. WHY IS THIS NOT PUBLIC? I THINK BMWUSA IS HIDING THIS FROM THE PUBLIC! WHILE IT…
CRANKSHAFT PULLEY WENT OUT AT 50,000 MILES WHILE IN MOTION MAKING CAR OVERHEAT.
Common questions
How serious is the engine problem on the 2015 mini Cooper Convertible?
It's a documented issue but not catastrophic. 10 complaints have been filed. Repairs average $3,100 and most owners catch it before it causes a breakdown.
At what mileage does the engine typically fail?
Mileage data is limited for this issue. Owners report failures across a wide range, suggesting cause is more about driving conditions and maintenance than mileage alone.
What does it cost to fix?
Independent shops typically charge around $3,100 for engine repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to engine?
No active recalls currently cover engine issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Other problem areas on this vehicle
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Severity ratings are derived from reported crashes, fires, injuries, and fatalities.
Repair cost estimates are independent-shop national averages and may differ in your area.
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