IsItAGoodCar
Reliability Guide

Common Problems with the
2004–2005 MINI Convertible (R52)

We've identified 3 known issues that can affect the 2004–2005 MINI Convertible (R52). 3 of these are serious faults that could be expensive to repair.

3
Known Issues
3
Serious
0
Moderate
0
Minor

All Known Issues

Roof Motor and Microswitch Faults

SeriousBodywork & Rust

The electro-hydraulic hood relies on healthy microswitches, wiring, and drains. Water or switch failure can stop the roof mid-cycle.

Est. Repair Cost: £300–£900
Warning Signs:

Roof stops halfway, Warning chimes during opening, Boot divider or roof warning lights

What to Inspect:
  • Run the hood fully multiple times
  • Check the parcel shelf divider is present and sensed correctly
  • Inspect the pump area and drains for moisture
Verified by IsItAGoodCar Research Team

Midland Gearbox Failure

SeriousGearbox & Transmission

Early non-S convertibles share the weak 5-speed Midland manual gearbox used in first-generation hatchbacks.

Est. Repair Cost: £800–£1,500
Warning Signs:

Gear whine, Difficulty selecting gears, Noise worsening once warm

What to Inspect:
  • Confirm whether it is an early 5-speed car
  • Test every gear under load and overrun
  • Look for gearbox replacement paperwork
Verified by IsItAGoodCar Research Team

Power Steering Pump Failure

SeriousSteering

Like the hatch, the electro-hydraulic steering pump can overheat and fail, often after noisy operation has been ignored for months.

Est. Repair Cost: £400–£700
Warning Signs:

Whining at parking speeds, Heavy steering when hot, Burning smell near the pump area

What to Inspect:
  • Listen after a full-lock manoeuvre
  • Inspect for evidence of the revised cooling fan
  • Check battery charging and voltage stability
Verified by IsItAGoodCar Research Team

Buying Tips for 2004–2005 MINI Convertible (R52)

  • ✓Buy on roof condition and dry interior condition before worrying about cosmetic trim
  • ✓Early One and Cooper manuals can still suffer the same Midland gearbox weakness as the hatch
  • ✓Inspect the rear arches, boot floor, and roof drains for trapped moisture and corrosion
  • ✓Cooper S convertibles need the same supercharger service evidence as the hatch
2006–2008
Check a 2004–2005 MINI Convertible (R52) by Registration