IsItAGoodCar
Reliability Guide

Common Problems with the
2012–2017 Ford B-Max (B299)

We've identified 4 known issues that can affect the 2012–2017 Ford B-Max (B299). 2 of these are serious faults that could be expensive to repair.

4
Known Issues
2
Serious
2
Moderate
0
Minor

All Known Issues

PowerShift Gearbox Judder and Failure

SeriousGearbox & Transmission

The dry-clutch 6DCT250 PowerShift automatic is notoriously problematic. Juddering on pull-away, hesitation during gear changes and eventual clutch or mechatronic failure are common, especially on cars used in stop-start urban traffic.

Est. Repair Cost: £800-£2,500
Warning Signs:

Judder when pulling away, Hesitation on gear changes, Transmission malfunction warning

What to Inspect:
  • Drive in slow traffic from cold and fully warm
  • Check for smooth reverse engagement
  • Ask for proof of regular gearbox fluid changes
Verified by IsItAGoodCar Research Team

1.0 EcoBoost Wet Belt and Coolant Leaks

SeriousEngine

The 1.0 EcoBoost engine uses an oil-bath timing belt that degrades over time. The cooling system is also prone to leaks from the expansion tank and hoses. Left unfixed, coolant loss can lead to overheating and cylinder head damage.

Est. Repair Cost: £400-£4,000
Warning Signs:

Low oil pressure warning, Engine rattle on start-up, Low coolant warning, White smoke from exhaust

What to Inspect:
  • Demand full service history with correct Ford-spec oil
  • Check whether the wet belt has been replaced
  • Inspect coolant level and look for staining
Verified by IsItAGoodCar Research Team

Sliding Door Mechanism and Sensor Faults

ModerateBodywork & Rust

The innovative sliding rear doors can fail to lock properly, trigger dashboard warnings, or become difficult to close. Faulty door latches, sensor failures or worn wiring in the door channels are the usual culprits.

Est. Repair Cost: £100-£300
Warning Signs:

Door will not lock properly, Dashboard door ajar warning, Sliding door jamming or scraping noises

What to Inspect:
  • Open and close both sliding doors repeatedly
  • Check that all doors lock and unlock from the fob
  • Inspect the door rails for debris or damage
Verified by IsItAGoodCar Research Team

Electrical Gremlins and Battery Drain

ModerateElectrics & Electronics

The B-Max can develop battery drain issues especially if left unused for a few days. General electrical gremlins include infotainment glitches and heated windscreen failures.

Est. Repair Cost: £80-£400
Warning Signs:

Flat battery after standing, Slow to start, Infotainment screen freezing, Heated windscreen segments failing

What to Inspect:
  • Check battery age and state of charge
  • Test all electrical functions
  • Ask if the car has been left unused for extended periods
Verified by IsItAGoodCar Research Team

Buying Tips for 2012–2017 Ford B-Max (B299)

  • ✓The PowerShift automatic gearbox is a major reliability risk; avoid it unless it has a perfect service history and shifts flawlessly without juddering.
  • ✓On 1.0 EcoBoost models, verify the use of correct Ford-spec oil to protect the wet-belt, and check that the coolant degas hose has been upgraded.
  • ✓Test the sliding rear doors to ensure they open and latch smoothly; check the runners for dirt and ensure the heavy doors haven't sagged.
  • ✓Inspect the interior trim and seat fabrics, which can show heavy wear from the family use this car was designed for.
  • ✓Listen for knocking from the front suspension, as the B-Max shares the Fiesta's appetite for anti-roll bar drop links and lower arm bushes.
  • ✓Ensure the SYNC infotainment system works and connects to phones, as the first-generation system can be temperamental.
Check a 2012–2017 Ford B-Max (B299) by Registration