IsItAGoodCar
Reliability Guide

Common Problems with the
2018 Infiniti Q50

We've identified 1 known issue that can affect the 2018 Infiniti Q50. None are considered critical, but they're worth knowing about before you buy.

1
Known Issues
0
Serious
1
Moderate
0
Minor

All Known Issues

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 2018 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.
20172019–2020
Check a 2018 Infiniti Q50 by Registration