Reliability Guide

Common Problems with the
2014–2017 Infiniti QX70 (FX)

We've identified 2 known issues that can affect the 2014–2017 Infiniti QX70 (FX). None are considered critical, but they're worth knowing about before you buy.

Known Issues

Serious

Moderate

Minor

The 2014–2017 period has 1 more issue than the Infiniti QX70 (FX) average across all year periods.

All Known Issues

V9X Diesel EGR and DPF Clogging

ModerateEngine

The 3.0L diesel engine is prone to carbon buildup in the EGR valve and DPF, especially if used for short urban trips.

Most affected: 3.0d / 30d

Estimated cost: £300–£1,200Affects: 2010–2017Often appears around: 50,000+ miles

Typical symptoms

•Limp mode
•Engine warning light
•Poor fuel economy
•Hesitation

What to inspect before you buy

✓Check for DPF regeneration history
✓Take the car for a long motorway run to ensure no lights appear

Brake Disc Warping

ModerateBrakes

The FX/QX70 is a heavy car, and spirited driving can lead to warped front brake discs, causing vibration under braking.

Estimated cost: £300–£500Affects: 2008–2018Often appears around: 30,000+ miles

Typical symptoms

•Steering wheel judder when braking
•Pulsing brake pedal

What to inspect before you buy

✓Apply the brakes firmly from 60mph (where safe) and feel for vibrations

Buying Tips for the 2014 Infiniti QX70 (FX)

✓Check the massive 21-inch alloy wheels for curbing; replacement tyres of this size are very expensive.
✓Listen for a whining noise from the rear differential or transfer case, indicating impending bearing failure.
✓On the 3.0d V6 diesel, verify the service history meticulously; oil dilution and DPF issues can occur if not driven on long runs.
✓Test the heavily contoured sports seats for full electrical adjustment, as the seat motors can occasionally fail.
✓Inspect the dashboard for any signs of the material bubbling or cracking under the windscreen in direct sunlight.
✓Check the brakes for judder; the heavy vehicle is very hard on brake discs, requiring frequent replacements.