BMW Z4 (2021)
2021 BMW Z4
CarHunch analysed 1,001 real MOT records for the 2021 BMW Z4. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
What to check before buying a 2021 BMW Z4
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 Z4
MOT history is one piece of the puzzle. These checks can reveal what CarHunch can't.
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Mileage Distribution
Most 2021 BMW Z4 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 Z4 vehicles fall between 13,425 and 26,294 miles.
2021 BMW Z4 — Still on the Road
Strong survival — 980 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
Most Common MOT Issues — 2021 BMW Z4
Based on actual MOT test records for this model. Percentage shows how often each item appears across all vehicles in this cohort.
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22.2%
Offside Rear Tyre worn close to legal limit/worn on edge
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21.4%
Nearside Rear Tyre worn close to legal limit/worn on edge
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13.3%
Offside Front Tyre worn close to legal limit/worn on edge
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10.9%
Nearside Front Tyre worn close to legal limit/worn on edge
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9.2%
Nearside Front Tyre has ply or cords exposed
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8.2%
Offside Front Tyre slightly damaged/cracking or perishing
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7.1%
Offside Rear Nail in tyre ()
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6.9%
Nearside Front Tyre slightly damaged/cracking or perishing
Data covers a 3-year window centred on 2021. Counts include advisories and failures.
Found a specific BMW Z4?
Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.