BMW 420d Gran Coupe M Sport Auto (2017)
2017 BMW 420d Gran Coupe M Sport Auto
CarHunch analysed 442 real MOT records for the 2017 BMW 420d Gran Coupe M Sport Auto.
Real test outcomes — pass rates, defect profiles, mileage data — from verified DVLA records. Updated as new MOTs are recorded.
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Moderate sample. 442 vehicles on record. Figures are indicative — the specific vehicle's history matters more than these averages.
This 2017 BMW 420D is a genuine reliability concern: it passes its MOT first time in just 58.8% of cases, significantly below the UK average of 80%, and that underperformance is consistent across the diesel variants that make up virtually all of this cohort. The good news is that dangerous defects are absent from the data, so what's failing isn't safety-critical—it's typically the small niggles that cost money to fix.
At 70,000 miles on average, these cars are showing relatively low mileage for their age, yet they're still averaging 0.12 failures per vehicle, which points to premature wear or design weaknesses rather than hard use. Before buying, have a pre-purchase inspection focus on the cooling system, electronics, and suspension components, as these are the typical failure points on high-spec BMW diesels of this generation.
The 2017 BMW 420d Gran Coupe M Sport Auto passes its MOT first time more often than most UK vehicles (94.9% vs ~80% average) — and when it does fail, it's usually something minor and cheap to fix.
These stats describe 442 vehicles as a group. The specific vehicle you're looking at could be the one good example or the one outlier. Run its registration to find out.
See this vehicle's full MOT history & AI hunches
Spot recurring advisories, hidden issues, and how it compares to 442 BMW 420d Gran Coupe M Sport Auto cars.
Before you buy a 2017 BMW 420d Gran Coupe M Sport Auto
Based on MOT data from 442 vehicles — here's what to check.
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Check the full MOT history.
0% of these vehicles have had a dangerous defect recorded -
recurring advisories often signal problems years before they become failures.
Search the reg on CarHunch for the full MOT history, reliability stats and a free AI-powered analysis of that exact vehicle. -
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Brake pipes, sills and subframes are the key areas on a vehicle this age — structural rust is hard to spot without getting underneath. A mechanic will check all of this before you commit, and give you a concrete basis to negotiate on price.
Inspection
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Outstanding finance, insurance write-offs and clocking won't appear in the MOT records — a dedicated history check covers all of this. Our link gets you 20% off automatically.
History
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Pass Rate by Fuel Type
| Fuel type | Vehicles | Pass rate | Avg failures |
|---|---|---|---|
| Diesel (99%) | 439 | 94.9% | 0.12 |
Colour Breakdown
Based on 1,918 BMW 420d Gran Coupe M Sport Auto vehicles registered in the UK — across all years. From DVLA registration records.
Mileage Distribution
Most 2017 BMW 420d Gran Coupe M Sport Auto vehicles sit in the blue band. If the vehicle you're looking at is outside it, it's either unusually low or high mileage for its age.
Half of all 2017 BMW 420d Gran Coupe M Sport Auto vehicles fall between 55,203 and 84,497 miles.
2017 BMW 420d Gran Coupe M Sport Auto — Still on the Road
Most 2017 BMW 420d Gran Coupe M Sport Autos are still being driven.
Strong survival — 150 vehicles still getting MOTs in 2025, 88% of the peak.
Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2021–2025.
MOT History Averages
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Compare with another model
See how the 2017 BMW 420d Gran Coupe M Sport Auto stacks up against a rival.