2003 Mini Cooper Transmission & Power Train Problems
NHTSA component category: POWER TRAIN · data through 07/12/2026
Source: U.S. NHTSA complaint data. Complaints are unverified reports from vehicle owners — a complaint is not a confirmed defect.
How power train ranks on this vehicle
Share of the 320 complaints citing each category; one complaint can cite several. Full breakdown on the 2003 Mini Cooper overview page.
What owners report
“I BOUGHT A 2003 MINI COOPER AND ABOUT A WEEK AND A HALF AGO, THE CLUTCH HYDRAULIC SYSTEM HAS SPRUNG A LEAK. UPON INSPECTION OF…”NHTSA complaint 10267190 — filed 04/29/2009
“SUDDEN UNEXPECTED FAILURE. CVT TRANSMISSION (AUTOMATIC) IN 2003 MINI COOPER. FIRST ONE WAS UNDER WARRANTY. THE SECOND TIME THEY TOLD ME THEY WOULD SELL ME…”NHTSA complaint 10221420 — filed 03/17/2008
“THE CONSUMER WAS UNABLE TO SHIFT THE GEAR INTO REVERSE. THE DEALER STATED IT WAS A MANUFACTURING DEFECT.”NHTSA complaint 10044711 — filed 10/24/2003
Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.
Power Train complaints by year filed
Frequently asked questions
Does the 2003 Mini Cooper have transmission & power train problems?
Power Train is the #3 most-reported problem area on the 2003 Mini Cooper: 29 of 320 complaints on file (9.1%). Complaints are unverified owner reports, not confirmed defects.
How many complaints does the 2003 Mini Cooper have in total?
320 complaints were on file with NHTSA as of 07/12/2026. Across all categories, 3 involved a crash, 27 involved a fire, 3 reported injuries, and none reported deaths.
What does NHTSA's power train category include?
NHTSA groups complaints about the transmission (automatic or manual), driveline, axles, transfer case and related parts under a single component category called POWER TRAIN. This page reports that category as NHTSA defines it.
