2017 Mercedes-Benz A-Class 2.1L Diesel · KN51 OXY
2017 Mercedes-Benz A-Class (2.1L, diesel). First registered 12 Jul 2017. Recorded mileage 66,233 miles. MOT expired on 21 Aug 2026.
- Make & Model
- MERCEDES-BENZ A-CLASS
- Year / Origin
- 2017 · Northampton
- Safety Recall
- Unknown
- MOT Status
- Expired on 21 Aug 2026
- Road Tax
- —
- Recorded Mileage
- 66,233 mi
- ULEZ Compliance
- ULEZ Compliant (Euro 6 Diesel)
- Fuel & Engine
- Diesel · 2.1L
- Reliability Guide
- Common Faults
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KN51 OXY Key Findings
- 4 MOT tests recorded
- Latest MOT passed on 22/08/2025
- 66,233 miles recorded at latest MOT
- No defects recorded at the latest MOT
Derived directly from the recorded DVSA and DVLA data shown on this page.
KN51 OXY MOT History
Interpretation generated from the recorded test data above — not an official DVSA statement and not a substitute for an independent inspection.
4 MOT tests are recorded for this 2017 Mercedes-Benz A-Class (KN51 OXY) between October 2022 and August 2025.
The record contains 4 passes and 0 failures.
No failures or advisories appear anywhere in the recorded tests, so the documented MOT record is relatively clean.
KN51 OXY Mileage History
- 07/10/202246,773 mi
- 05/10/202355,088 mi+8,315 mi
- 30/09/202460,642 mi+5,554 mi
- 22/08/202566,233 mi+5,591 mi
Average of roughly 6,769 miles per year across 4 recorded odometer readings.
Technical Specifications
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Known faults for Mercedes-Benz Mercedes-Benz A-Class (W176)
Our database tracks 6 specific mechanical faults and recurring failure patterns identified across UK MOT testing stations for this generation.
MOT Roadworthiness: Average
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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MERCEDES-BENZ A-CLASS Model Intelligence & Reliability
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Owner-reported defects, recurring MOT failure points, and estimated repair costs.
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Historical MOT pass rates and DVLA records for 2017 model year cars.
- OM651 Diesel Chain Tensioner Oil LeakModerate
On 1.8-litre and 2.1-litre OM651 diesel engines, the timing chain tensioner seal is a well-documented weak point. Over time the rubber O-ring gasket degrades, leading to persistent engine oil weeping down the right flank of the engine block. Left unaddressed, loss of oil pressure at the tensioner can cause timing chain rattle on startup and premature stretch.
- DCT gearbox judder and clutch wearModerate
The 7G-DCT dual-clutch transmission (Getrag/Mercedes 724.0) suffers from low-speed lurching, clutch shudder, and software calibration drift, particularly on cars driven primarily in stop-start urban traffic. Neglecting the mandatory 4-year/40,000-mile transmission fluid and dual-filter service accelerates clutch pack wear and mechatronic solenoid sticking.
- M270 Petrol Timing Chain StretchSerious
The 1.6-litre and 2.0-litre M270 turbocharged four-cylinder petrol engines can experience timing chain elongation and tensioner fatigue, especially when subject to extended variable service intervals. An elongated chain causes camshaft timing deviation, triggering check engine warnings and in severe cases skipping teeth.
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