P0730 on MINI: How to Diagnose & Fix
Incorrect Gear Ratio
2 MINI models · 2 documented issues · $300-$3,000 repair
P0730 on MINI by model: symptoms, diagnosis and fix
Manual transmission MINI Cooper S models experience premature clutch and dual-mass flywheel (DMF) failure, often before 60k miles. The DMF springs weaken causing chatter and vibration, and the clutch disc wears prematurely due to the turbo engine's torque characteristics.
Common Symptoms
- Clutch chatter on engagement
- Vibration at idle in gear
- Grinding noise from clutch area
- Slipping clutch under boost
- Difficulty shifting
How to Fix
Replace clutch disc, pressure plate, throwout bearing, and dual-mass flywheel as a set. Some owners convert to a single-mass flywheel for durability, though this increases NVH.
The F60 Countryman's Aisin AW TF-81SC/AF40 8-speed automatic transmission develops a shudder during light acceleration, particularly between 30-50 mph. The torque converter lockup clutch is the primary cause.
Common Symptoms
- Shudder during light acceleration
- Vibration at 30-50 mph
- Harsh shifting
- Hesitation between gears
How to Fix
Perform a transmission fluid flush with correct BMW/MINI ATF. If shudder persists, torque converter replacement may be needed. Software update may also address shift quality.
P0730 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0730 mean on a MINI?
P0730 stands for "Incorrect Gear Ratio." This code means the transmission computer detected that the actual gear ratio (calculated from input vs. output shaft speeds) does not match what it should be for the commanded gear. In other words, the transmission isn't delivering the correct gear, which often shows up as slipping, flaring RPM during shifts, or being stuck in the wrong gear. It can stem from internal mechanical wear, low or contaminated fluid, or faulty solenoids and sensors. The vehicle may shift harshly or enter limp mode. On MINI it is documented across 2 models: Cooper S, Countryman.
What are the most common causes of P0730?
The most common causes of P0730 are: Low or contaminated transmission fluid, Worn clutches or bands (internal slipping), Faulty shift solenoids, Dirty or sticking valve body, Faulty input or output speed sensor, Internal hydraulic/line pressure problems, Torque converter problems, General high-mileage transmission wear. The specific cause varies by vehicle.
How much does it cost to fix P0730 on a MINI?
Published repair estimates on MINI range from $300 to $3,000 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P0730 on a different make?
View P0730 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.