1999 Porsche 911 3.4L Petrol · GNZ 606
1999 Porsche 911 (3.4L, petrol). First registered 12 Mar 1999. Recorded mileage 79,563 miles. MOT valid until 18 Feb 2027. Taxed until 01 Aug 2027.
- Make & Model
- PORSCHE 911
- Year / Origin
- 1999 · Maidstone
- Safety Recall
- Unknown
- MOT Status
- Valid until 18 Feb 2027
- Road Tax
- Taxed (01 Aug 2027)
- Recorded Mileage
- 79,563 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.
GNZ 606 Key Findings
- 5 MOT tests recorded
- Latest MOT passed on 19/02/2026
- 79,563 miles recorded at latest MOT
- 2 historical MOT failures
- No defects recorded at the latest MOT
- Recurring exhaust & emissions items (4 mentions)
Derived directly from the recorded DVSA and DVLA data shown on this page.
GNZ 606 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 (GNZ 606) between December 2023 and February 2026.
The record contains 3 passes and 2 failures.
The most recent test on 19 February 2026 was a pass, although the earlier record includes 2 failures that buyers may want to investigate.
Across all tests, the most frequently flagged areas are: Exhaust & Emissions (4 issues), Tyres (1 issue). Repeated mentions in one area can indicate an ongoing pattern worth checking in person.
Recorded failure items include: “Offside Front Tyre fouling a part of the vehicle (5.2.3 (f))”; “Exhaust carbon monoxide content at idle exceeds manufacturer's specified limits (8.2.1.2 (b))”; “Exhaust Lambda reading after 2nd fast idle outside specified limits (8.2.1.2 (c))”.
GNZ 606 Mileage History
- 15/12/202378,053 mi
- 15/12/202378,084 mi+31 mi
- 11/12/202478,581 mi+497 mi
- 16/02/202679,562 mi+981 mi
- 19/02/202679,563 mi+1 mi
Average of roughly 692 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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