Used car guide

2014 Mercedes-Benz G-Class: common problems and MOT failures

What MOT testers find on the Mercedes-Benz G-Class first registered in 2014: we looked at the 352 MOTs these cars had during 2023–2025. Plus known faults and what to look at before you buy one.

Small sample: there were only 352 MOTs of these cars during 2023–2025, so treat the percentages as rough. The known faults below don't depend on it.

352MOTs of 2014 cars, done in 2023–2025
81%pass first time (all 2014 cars: 70%)
5,600typical miles a year
17%had brakes flagged

Common 2014 Mercedes-Benz G-Class MOT failures and advisories

The share of 2014 Mercedes-Benz G-Class MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.

  • Brakes
    17% of testsRough price £150–£350

    At the viewing: Look for a lip on the disc edges and feel for judder or pulling when braking firmly from about 40mph.

  • Tyres
    12% of testsRough price £70–£150

    At the viewing: Check the tread on all four tyres, including the inside edges, and look for cracks or bulges.

  • Suspension
    11% of testsRough price £120–£400

    At the viewing: Listen for knocks over speed bumps, and look behind each front wheel for a snapped coil spring.

  • Lights and electrics
    10% of testsRough price £10–£80

    At the viewing: Ask a friend to check every light, including brake lights and indicators, while you operate them.

  • Oil and fluid leaks
    9% of testsRough price £80–£600

    At the viewing: Look under the engine and on the ground where the car is usually parked for fresh oil or fluid.

  • Exhaust and emissions
    6% of testsRough price £100–£1,200

    At the viewing: Look for black soot in the tailpipe, listen for blowing from the exhaust and check for engine or DPF warning lights.

Questions to ask the seller before buying a 2014 Mercedes-Benz G-Class

Ask before you travel to see it. A seller who knows the car will have answers, and receipts.

  1. Can I see the service history and receipts for any big jobs?

Looking at a Mercedes-Benz G-Class?

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Other years

Every year of the Mercedes-Benz G-Class compared

YearMOT testsMost flagged
2026–Too new for MOT data
2025–Too new for MOT data
2024–Too new for MOT data
2023–Too new for MOT data
2022452Tyres 16%
20211,041Tyres 18%
20201,163Tyres 14%
20191,419Tyres 16%
2018763Tyres 16%
2017690Tyres 17%
2016508Tyres 18%
2015436Brakes 17%
2013318Brakes 17%
2012172Brakes 20%
2011129Brakes 18%

Where this comes from: the DVSA's anonymised results for every MOT test done in Great Britain during 2023–2025, counting the MOTs of Mercedes-Benz G-Class cars first registered in 2014. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score