IsItAGoodCar
Reliability Guide

Common Problems with the
2009 MINI Convertible (R57)

We've identified 3 known issues that can affect the 2009 MINI Convertible (R57). 3 of these are serious faults that could be expensive to repair.

3
Known Issues
3
Serious
0
Moderate
0
Minor

All Known Issues

N14 Timing Chain Failure

SeriousEngine

Early turbo convertibles share the N14 chain tensioner and guide issues of the R56 hatch, but access and packaging can make diagnosis more annoying.

Est. Repair Cost: £700–£1,300
Warning Signs:

Cold-start rattle, Rough idle, Timing faults or limp mode

What to Inspect:
  • Confirm whether it is an N14 or later N18 car
  • Look for proper chain-kit invoices
  • Do not assume a quiet hot engine means the issue is gone
Verified by IsItAGoodCar Research Team

Roof Motor / Latch Sensor Faults

SeriousBodywork & Rust

The electric hood and latch sensors are sensitive to low voltage, water ingress, and microswitch wear, leading to roofs that stop or refuse to start a cycle.

Est. Repair Cost: £250–£900
Warning Signs:

Roof warning light, Hood pauses mid-cycle, Boot or latch not recognised

What to Inspect:
  • Operate the roof fully more than once
  • Inspect drains and rear quarter trims for dampness
  • Check battery age and charging voltage
Verified by IsItAGoodCar Research Team

High Pressure Fuel Pump (HPFP)

SeriousFuel System

Turbo convertibles can suffer the same HPFP failures as hatchbacks, giving hard starts and drivetrain warnings that sellers sometimes mask with a fresh battery.

Est. Repair Cost: £500–£900
Warning Signs:

Long cranking, Stumble under hard acceleration, Drivetrain malfunction messages

What to Inspect:
  • Drive the car hard once warm
  • Check for replacement history
  • Read fuel-pressure codes before blaming plugs or coils
Verified by IsItAGoodCar Research Team

Buying Tips for 2009 MINI Convertible (R57)

  • ✓The same N14-versus-N18 advice applies here: late-2010-on Cooper S cars are much easier to recommend
  • ✓Run the hood several times and check the boot divider, latch sensors, and drain condition
  • ✓Check for wet front footwells and rear side panels because drain blockages travel into electrical issues
  • ✓Short-trip cars often show the worst carbon, HPFP, and battery-voltage issues
2010
Check a 2009 MINI Convertible (R57) by Registration