2021 BMW I4 M50 Electric · 129 JON
2021 BMW I4 M50 (electric). First registered 06 Dec 2021. Recorded mileage 37,976 miles. MOT valid until 05 Dec 2026. Taxed until 01 Aug 2027.
- Make & Model
- BMW I4 M50
- Year / Origin
- 2021
- Safety Recall
- Unknown
- MOT Status
- Valid until 05 Dec 2026
- Road Tax
- Taxed (01 Aug 2027)
- Recorded Mileage
- 37,976 mi
- ULEZ Compliance
- ULEZ Exempt (Zero Emissions)
- Fuel & Engine
- Electric
- Reliability Guide
- Common Faults
AI-generated interpretation of this vehicle’s MOT record — not an official statement and not a substitute for an independent inspection.
129 JON Key Findings
- 3 MOT tests recorded
- Latest MOT passed on 11/11/2025
- 37,976 miles recorded at latest MOT
- 1 historical MOT failure
- 3 defects noted at the latest MOT
- Recurring tyres items (3 mentions)
Derived directly from the recorded DVSA and DVLA data shown on this page.
MOT Roadworthiness: Good
This rating reflects historical MOT pass rates and recurring advisory wear patterns from official DVSA test logs. Note that roadworthiness does not verify outstanding finance, insurance write-offs, or stolen records.
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129 JON Mileage History
- 05/11/202427,368 mi
- 06/11/202427,368 mi
- 11/11/202537,976 mi+10,608 mi
Average of roughly 10,447 miles per year across 3 recorded odometer readings.
129 JON MOT History
Interpretation generated from the recorded test data above — not an official DVSA statement and not a substitute for an independent inspection.
3 MOT tests are recorded for this 2021 BMW I4 M50 (129 JON) between November 2024 and November 2025.
The record contains 2 passes and 1 failure.
The most recent test on 11 November 2025 was a pass, although the earlier record includes 1 failure that buyers may want to investigate.
Across all tests, the most frequently flagged areas are: Tyres (3 issues). Repeated mentions in one area can indicate an ongoing pattern worth checking in person.
In total 3 advisory notices are recorded. Advisories flag items that passed but may need attention before the next test; they are not evidence of how well the vehicle has been serviced.
Recorded failure items include: “Nearside Side repeater not working (4.4.1 (a) (ii))”.
Buyer's Guide & Inspection Advisory
Expert automotive synthesis from historical MOT defect records and market benchmarks.
Our Verdict
This BMW i4 M50 represents a sensible us
Given the i4 M50 is a high-performance variant producing up to 544hp in Boost mode, prioritise a battery state-of-health report from BMW or a specialist such as Tesla Service Centres or independent EV diagnostics firms — the MOT cannot verify battery condition. The November 2025 MOT advisory on all four tyres at 3mm means you should budget around £600-£900 for a quality set (correct sizes are typically 245/40 R19 front and 255/40 R19 rear) and use this as a negotiation point. Insist on seeing any BMW i brand service records, though note that EVs require minimal scheduled maintenance — typically brake fluid, cabin filter, and tyre rotations. Confirm the wallbox or charging history if possible, as DC fast charging habits can affect long-term battery longevity.
The single MOT failure on 5 November 2024 was for a nearside side repeater not working — almost certainly a failed LED unit or simple bulb replacement costing under £50. The vehicle passed the very next day, confirming a trivial fix. This pattern suggests the car has not been neglected; rather, it caught a minor electrical issue at an inconvenient moment. When viewing, check that all indicators, including the side repeaters in the wing mirrors, function correctly. Also confirm the high-voltage battery warranty remains in force — BMW provides an 8-year/100,000-mile warranty on i4 batteries, which would still apply to this car until December 2029.
Electricity costs for the i4 M50 depend heavily on home charging versus public rapid charging. With an 80.7 kWh usable battery and a real-world range of around 250-280 miles, home charging at 30p/kWh delivers approximately 4-5p per mile, translating to roughly £1,400-£1,800 in annual electricity if covering 10,000 miles. Use of public rapid chargers at 60p/kWh or more will push this significantly higher. Vehicle Excise Duty is £0 for BEVs, and the i4 M50 sits in insurance group 44-45E, suggesting premiums of £900-£1,400 annually for experienced drivers.
Routine maintenance is minimal compared with a petrol BMW — no oil changes, spark plugs, or exhaust servicing. Expect annual costs of around £150-£250 for tyre rotations, brake fluid (every two years), cabin filter, and inspection. The front brakes on an EV often last 80,000+ miles due to regenerative braking, but the rears can corrode from underuse. Budget a £200-£400 EV-specific service every two years at a BMW centre or specialist. Overall estimated annual running cost sits in the £2,400-£2,900 bracket, dominated by insurance and electricity.
Begin with the four tyres — the November 2025 MOT recorded all four at 3mm tread, the legal minimum. By the time of purchase in 2026, these are almost certainly due for replacement. Check the sidewalls for uneven wear, which on the i4 M50 can indicate alignment issues given the powerful drivetrain. Examine the charging port flap and cable for damage, and verify the Type 2 and CCS connectors operate smoothly. Inspect the 19-inch or optional 20-inch alloy wheels for kerb rash, which is common on performance BMWs.
Inside, test all seat memory functions, the curved display, and the iDrive 8.5 infotainment system for software glitches — early i4 models occasionally required over-the-air updates to resolve infotainment bugs. Check the driver assistance features including adaptive cruise, lane departure warning, and parking sensors. Under the bonnet (frunk), there is no serviceable item but check for damage from poorly stored charging cables. On the test drive, listen for any suspension clonks over speed humps — the M50's adaptive M suspension can be costly to refurbish if dampers fail. Finally, confirm the high-voltage battery certificate or diagnostic report shows at least 90% state of health for a 2021 car.
Registered in December 2021, this black BMW i4 M50 has accumulated 37,976 miles across its first four years, slightly above the model's average annual mileage of 9,684 (which would equate to roughly 38,736 miles by late 2025). The MOT history is essentially clean: three passes and one trivial failure for a non-functioning side repeater lamp. The most recent test noted all four tyres wearing close to the legal limit at 3mm, which is the only standing concern and points to an immediate replacement budget. Against a model fleet of over 7,300 vehicles with an 85% pass rate, this individual car sits comfortably within the better-performing cohort.
The BMW i4 enjoys an 85% MOT pass rate across 7,376 vehicles analysed, placing it broadly in line with the all-electric vehicle segment average. Common failure reasons centre on tyres and washer fluid, both relatively trivial items, suggesting the underlying electric drivetrain is robust in MOT terms.
Reviewed by the IsItAGoodCar editorial team — Verified automotive analysis synthesized from official vehicle registries.
Data Sources
DVSA
Official MOT test logs & failure reasons
DVLA
Tax, registration & powertrain specs
Experian
Finance, stolen markers & total loss
AI Analysis
Historical fault & advisory patterns
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