Mercedes Benz G 400 Amg Line Prem D 4matic A (2021)
2021 Mercedes Benz G 400 Amg Line Prem D 4matic A
CarHunch analysed 125 real MOT records for the 2021 Mercedes Benz G 400 Amg Line Prem D 4matic A. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
This G-Class diesel is underperforming on first MOT, with a 71.9% pass rate versus the UK average of 80%—a meaningful gap that suggests owners are hitting issues earlier than typical. The good news is dangerous defects are uncommon at 7.2%, so failures tend to be fixable rather than deal-breaking.
At 31,972 miles median for a 2021, these cars are running well within normal wear parameters, yet averaging 1.0 advisory per test indicates minor niggles are emerging. If you're buying one, budget for small repairs during ownership and request a pre-purchase inspection that specifically checks brake fluid condition, suspension components, and emissions systems, where this model's early failures cluster.
What to check before buying a 2021 Mercedes Benz G 400 Amg Line Prem D 4matic A
Practical pre-purchase checks for this age and model.
- 📋 Check the full MOT history. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. Enter the reg below for a full AI analysis.
- 🔍 Inspect for corrosion in person. Brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that's expensive to fix and can fail an MOT.
- 🛞 Check tyres and brakes. The most common advisory items at this age. Budget for replacement if they're near the limit — factor this into your offer price.
- 📄 Run an HPI check. The MOT history won't show outstanding finance, insurance write-offs, or stolen status — an HPI check will.
Before you buy a Mercedes Benz G 400 Amg Line Prem D 4matic A
MOT history is one piece of the puzzle. These checks can reveal what CarHunch can't.
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Mileage Distribution
Most 2021 Mercedes Benz G 400 Amg Line Prem D 4matic A vehicles sit in the blue band. If the car you're looking at is outside it, it's either unusually low or high mileage for its age.
Half of all 2021 Mercedes Benz G 400 Amg Line Prem D 4matic A vehicles fall between 24,891 and 41,118 miles.
MOT History Averages
Found a specific Mercedes Benz G 400 Amg Line Prem D 4matic A?
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