1999 Porsche 911 3.4L Petrol · T877 AGX
1999 Porsche 911 (3.4L, petrol). First registered 09 Apr 1999. Recorded mileage 185,231 miles. MOT valid until 23 Nov 2026.
- Make & Model
- PORSCHE 911
- Year / Origin
- 1999
- Safety Recall
- Unknown
- MOT Status
- Valid until 23 Nov 2026
- Road Tax
- —
- Recorded Mileage
- 185,231 mi
- ULEZ Compliance
- Check Required (Pre-Euro 4 Petrol)
- Fuel & Engine
- Petrol · 3.4L
- Reliability Guide
- Common Faults
Thinking of buying this vehicle? Free MOT and tax checks do not cover legal ownership. If outstanding finance exists, finance companies have legal right to repossess without compensation.
T877 AGX Key Findings
- 5 MOT tests recorded
- Latest MOT passed on 20/11/2025
- 185,231 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.
T877 AGX MOT History
Interpretation generated from the recorded test data above — not an official DVSA statement and not a substitute for an independent inspection.
5 MOT tests are recorded for this 1999 Porsche 911 (T877 AGX) between November 2021 and November 2025.
The record contains 5 passes and 0 failures.
No failures or advisories appear anywhere in the recorded tests, so the documented MOT record is relatively clean.
T877 AGX Mileage History
- 23/11/2021172,002 mi
- 24/11/2022176,259 mi+4,257 mi
- 03/11/2023180,155 mi+3,896 mi
- 11/11/2024182,475 mi+2,320 mi
- 20/11/2025185,231 mi+2,756 mi
Average of roughly 3,314 miles per year across 5 recorded odometer readings.
Technical Specifications
Core Specifications
Identification & Status
Dimensions & Weights
Diagnostic & Valuation Intelligence
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Known faults for Porsche Porsche 911 (996)
Our database tracks 4 specific mechanical faults and recurring failure patterns identified across UK MOT testing stations for this generation.
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.
Verify lender finance agreements, insurance write-offs, police stolen registers, and mileage rollback.
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PORSCHE 911 Model Intelligence & Reliability
Verified MOT failure trends, buying advice, and technical directory specifications.
Owner-reported defects, recurring MOT failure points, and estimated repair costs.
Browse production generations, registration statistics, and trim variants.
Historical MOT pass rates and DVLA records for 1999 model year cars.
- IMS Bearing FailureSerious
Early M96 engines can suffer intermediate shaft bearing failure, leading to major internal damage.
- Rear Main Seal Oil LeakModerate
The rear main seal between engine and gearbox degrades over time, causing oil to leak into the bellhousing area. Often mistaken for IMS failure.
- Coolant Pipe FailuresModerate
The coolant crossover pipes and thermostat housing o-rings perish, causing coolant loss and potential overheating. Plastic degrades with heat cycles.
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