Infiniti Q30 / QX30
The Q30 and its crossover sibling, the QX30, were Infiniti's attempt at premium compact cars, heavily based on the Mercedes-Benz A-Class and GLA. They share platforms, engines, and gearboxes with Mercedes, meaning they inherit both German refinement and specific mechanical weaknesses.
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Common Faults & Reliability
These are the most common documented problems for the Infiniti Q30 / QX30, sorted by their typical impact and frequency.
DCT Gearbox Sensor and Software Issues
high severityThe Mercedes-sourced 7-speed dual-clutch transmission can suffer from jerky shifts or failing speed sensors, which can put the car into limp mode.
OM651 Diesel Timing Chain Tensioner
high severityThe 2.1-litre diesel engine (badged as 2.2d) is known for timing chain tensioner wear. If left unaddressed, the chain can stretch or snap, leading to catastrophic engine failure.
Suspension Component Wear
low severityShared with the GLA, the front suspension bushes and drop links can wear prematurely, leading to knocks and vague steering.
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