IsItAGoodCar
Reliability Guide

Common Problems with the
2015 Infiniti Q50

We've identified 3 known issues that can affect the 2015 Infiniti Q50. 1 of these are serious faults that could be expensive to repair.

3
Known Issues
1
Serious
2
Moderate
0
Minor

All Known Issues

2.2d Turbo and Injector Issues

SeriousEngine

The Mercedes-sourced 2.1L diesel (2.2d) can suffer from turbocharger actuator failure and piezo-injector leaks as it ages.

Est. Repair Cost: £600–£1,800
Warning Signs:

Loss of power, Black smoke from exhaust, Diesel smell in the cabin, Engine stuttering

What to Inspect:
  • Look for "black death" (carbon buildup) around the injectors under the engine cover
  • Test for smooth power delivery without hesitation
Verified by IsItAGoodCar Research Team

Direct Adaptive Steering (DAS) Glitches

ModerateSteering

The steer-by-wire system can suffer from software bugs or hardware sensor failures. In rare cases, the system can lose its calibration, requiring a complex dealer-level reset.

Est. Repair Cost: £200 (Software) / £2,000+ (Hardware)
Warning Signs:

Steering wheel not straight when driving straight, Warning light on dash, Loss of steering feel/weight

What to Inspect:
  • Perform a series of slow, full-lock turns and ensure the wheel returns to center correctly
  • Check if the car tracks straight on a flat road
Verified by IsItAGoodCar Research Team

Hybrid 12V Battery Parasitic Drain

ModerateElectrics & Electronics

The auxiliary battery on Hybrid models can drain in as little as 10 days if left unused, leaving the car unable to start.

Est. Repair Cost: £150–£250
Warning Signs:

Car won't unlock or start, Multiple warning lights, Infotainment settings lost

What to Inspect:
  • Check the age of the 12V battery
  • Ask the owner if they use a trickle charger
Verified by IsItAGoodCar Research Team

Buying Tips for 2015 Infiniti Q50

  • ✓If the car has "Direct Adaptive Steering" (steer-by-wire), test it extensively; ensure there are no warning lights, as repairs are highly specialized.
  • ✓Check the dual-screen infotainment system, which is known to be laggy and can occasionally freeze or reboot unexpectedly.
  • ✓On the 2.2d (Mercedes-sourced diesel), check for smooth power delivery and ensure the DPF is not blocked from short city trips.
  • ✓Listen for suspension knocking, particularly from the front anti-roll bar drop links.
  • ✓Inspect the interior trim; while luxurious, the leather on the driver's seat bolsters can wear prematurely.
  • ✓Ensure the automatic gearbox shifts smoothly without hesitation, particularly when downshifting under load.
Check a 2015 Infiniti Q50 by Registration