BMW X4 Xdrive30d M Sport MHEV Auto (2021)
2021 BMW X4 Xdrive30d M Sport MHEV Auto
CarHunch analysed 219 real MOT records for the 2021 BMW X4 Xdrive30d M Sport MHEV Auto. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
This 2021 BMW X4 diesel hybrid is a strong performer, with a 90.1% first-time pass rate that sits well above the UK average of 80%, and only 6.9% of vehicles have ever recorded a dangerous defect—nothing to lose sleep over. The diesel-hybrid variant (which accounts for 202 of the 219 cars tested) maintains a 89.6% pass rate, so fuel type isn't a meaningful factor here.
At 32,500 miles median for a three-year-old car, these vehicles are running light, and that low failure rate of just 0.25 per vehicle explains why—owners aren't battling major mechanical problems yet. The 0.9 advisories per car suggest minor wear items are starting to show, which is normal at this age, so have a pre-purchase inspection flag any fluid leaks or suspension wear before committing.
What to check before buying a 2021 BMW X4 Xdrive30d M Sport MHEV Auto
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 BMW X4 Xdrive30d M Sport MHEV Auto
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Pass Rate by Fuel Type
| Fuel type | Vehicles | Pass rate | Avg failures |
|---|---|---|---|
| Electric Diesel (92%) | 202 | 89.6% | 0.26 |
| Other (6%) | 13 | 100% | 0 |
| Diesel (2%) | 4 | 85.4% | 0.5 |
Mileage Distribution
Most 2021 BMW X4 Xdrive30d M Sport MHEV Auto 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 BMW X4 Xdrive30d M Sport MHEV Auto vehicles fall between 24,774 and 41,523 miles.
2021 BMW X4 Xdrive30d M Sport MHEV Auto — Still on the Road
Strong survival — 207 vehicles still getting MOTs in 2025, 100% of the peak.
Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2023–2025.
MOT History Averages
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