Infiniti Q50 Common Problems & Reliability
The Infiniti Q50 is a sleek, handsome executive saloon that was Nissan’s luxury division's attempt to challenge the BMW 3 Series and Mercedes C-Class. It offered a high level of standard equipment, a comfortable ride, and uniquely aggressive Japanese styling. In the UK, it struggled to gain a foothold due to the dominance of German brands, making it a rare and depreciated used buy. The most controversial feature was the "Direct Adaptive Steering" (steer-by-wire system) on certain models, which felt artificial to driving enthusiasts. Reliability is generally robust, especially the Mercedes-sourced 2.2-litre diesel, making it a left-field bargain for buyers wanting a distinctive, reliable executive cruiser.
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Detailed fault breakdown, symptoms, and estimated repair bills by production year.
Most Common Infiniti Q50 Faults & Repair Costs
Direct Adaptive Steering (DAS) Glitches
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.
Steering wheel not straight when driving straight, Warning light on dash, Loss of steering feel/weight
2.2d Turbo and Injector Issues
The Mercedes-sourced 2.1L diesel (2.2d) can suffer from turbocharger actuator failure and piezo-injector leaks as it ages.
Loss of power, Black smoke from exhaust, Diesel smell in the cabin, Engine stuttering
Hybrid 12V Battery Parasitic Drain
The auxiliary battery on Hybrid models can drain in as little as 10 days if left unused, leaving the car unable to start.
Car won't unlock or start, Multiple warning lights, Infotainment settings lost
Buying a used Infiniti Q50? Always check for hidden finance and write-off history.
Mechanical problems are only half the battle. Over 1 in 3 UK used cars checked have unpaid finance or accident write-off records that could cause you to lose the car or thousands in value.