Folding hardtop roof mechanism motor and microswitch failures
- Typically appears
- 60,000+ miles
- What to inspect
- Operate the roof fully several times and listen for grinding or hesitation

A 2012 BMW Z4 is now 14 years old, so an average example has covered around 189,000 miles. A mid-run car · most launch faults had been addressed by this point, and wear items are the main risk at this age. Check the state safety inspection and service history alongside the documented faults below, which are sorted by whether a 2012 car has usually reached the mileage where they appear.
Compiled & reviewed by the VehicleFaults Research Team
The 2012 BMW Z4 is 14 years old, so an average example has covered roughly 189,000 miles. At that mileage 4 of the documented faults are already due, so check those first.
Documented onset mileage is at or below the ~189k miles an average 2012 car has covered.
Folding hardtop roof mechanism motor and microswitch failures
Water pump and thermostat failures on N20 and N54 engines
High-pressure fuel pump failures on N54 turbo petrol
Front control arm bushes wearing causing vague steering
Age, electronics and build-related issues that are not mileage-driven.
Convertible roof warning sensors and switch faults
Generate a tickable pre-purchase checklist for this exact year, mileage and variant · add photos and notes as you inspect.
Check this exact carIt can develop motor and sensor faults with age, so testing it fully before buying is essential.
The naturally aspirated six-cylinder units are generally more dependable than the N54 turbo.
Yes, water pumps and thermostats fail periodically, so check for a documented replacement history.
Roof and turbo engine repairs can be expensive, so a full history is valuable reassurance.