Porsche Unknown Reliability, MOT Pass Rate & Common Faults
Free Porsche Unknown car check
Is the Porsche Unknown reliable? We analysed 988 real MOT tests across 361 vehicles to find out.
Got a specific Porsche Unknown? Enter the reg for a free check:
The Porsche Unknown is above average for reliability based on real UK MOT data. Common problems include brake pipe excessively corroded, headlamp aim beam image kick up to the offside and headlamp aim too high. Here's everything you need to know before buying a used Porsche Unknown.
Porsche Unknown Number Plates
Number plates registered to a Porsche Unknown. Click on any registration for full vehicle details — including MOT history, mileage records, previous owners and damage history.
Porsche Unknown MOT Pass Rate by Year
How likely is a Porsche Unknown to pass its MOT? Here's the pass rate for each registration year, newest first.
Porsche Unknown Problems — What Goes Wrong?
The most common reasons a Porsche Unknown fails its MOT, ranked by how often they occur. Check for these problems before you buy.
Porsche Unknown Common Faults & Problems
These are the most common serious faults found on Porsche Unknown models during MOT testing — flagged as dangerous or major failures that need immediate attention.
Porsche Unknown Mileage — What's Normal?
How many miles does a typical Porsche Unknown owner drive per year? Use this to check if a car you're looking at has suspiciously low or high mileage.
Porsche Unknown MOT Data by Registration Year
Full breakdown of pass rate and mileage for each year. Use this to compare the Porsche Unknown year you're looking at.
| Year | Tests | Pass Rate | Low Mi. | Typical Mi. | High Mi. |
|---|---|---|---|---|---|
| 2016 | 126 | 86.5% | 14,709 | 32,135 | 61,371 |
| 2015 | 62 | 90.3% | 21,660 | 39,030 | 70,446 |
How Long Does a Porsche Unknown Last?
Based on 361 Porsche Unknown vehicles on UK roads.
Porsche Unknown Mileage Distribution
Total mileage recorded across all Porsche Unknown MOT tests. If the car you're looking at is above the 75th percentile, it's done more miles than most.
Best Year to Buy a Used Porsche Unknown
Based on MOT pass rates across all registration years with sufficient test data.
90.3% MOT pass rate from 62 tests
86.5% MOT pass rate from 126 tests
The best year to buy a used Porsche Unknown is 2015, which has the highest MOT pass rate at 90.3% across 62 tests. The 2016 model year has the lowest pass rate at 86.5% — if you're looking at one from that year, budget for potential repairs and get a thorough pre-purchase inspection.
How Does the Porsche Unknown Compare?
MOT pass rates compared to similar models. Click any model for the full breakdown.
| Model | Pass Rate | Tests | Typical Mileage | Lifespan |
|---|---|---|---|---|
| Porsche Unknown THIS CAR | 86.8% | 988 | 58,042 mi | 11 yrs |
| Porsche 911 | 85.2% | 977,057 | 55,056 mi | 47 yrs |
| Porsche Boxster | 82.8% | 726,695 | 55,739 mi | 29 yrs |
| Porsche Cayenne | 84.5% | 388,697 | 65,616 mi | 23 yrs |
| Audi A6 S Ln Blk ED 45 TFSI QUAT Sa | 91.8% | 1,885 | 33,770 mi | — yrs |
Compared to the Porsche 911 (85.2% pass rate) and the Porsche Boxster (82.8% pass rate), the Porsche Unknown outperforms both on MOT reliability.
Found a Porsche Unknown you like?
Run a full vehicle history check on the specific car. See finance, stolen, write-off, mileage and MOT data for that exact vehicle.
Check a specific Porsche UnknownShould you buy a used Porsche Unknown?
The Porsche Unknown has an overall MOT pass rate of 86.8% across 988 real MOT tests — comfortably above the UK average, which puts it among the more reliable models on UK roads.
The most common problems on the Porsche Unknown are brake pipe excessively corroded (9 recorded failures), headlamp aim beam image kick up to the offside (8), and headlamp aim too high (8). These are the faults most likely to cause an MOT failure on this model, so check for them carefully on any test drive or pre-purchase inspection. Many are wear-and-tear items that can be budgeted for, but a car that's already failing on multiple fronts may signal neglected maintenance.
On the safety side, the most frequently flagged dangerous fault is parking brake efficiency less than 50% of the required value. Dangerous faults cause an immediate MOT failure and mean the vehicle is not roadworthy until repaired. If you're viewing a Porsche Unknown with an expired or recently passed MOT, ask the seller whether any dangerous faults were found and fixed during the last test.
A typical Porsche Unknown owner drives around 1,282 miles per year. If the car you're looking at is significantly above this, expect more wear on suspension, brakes and tyres. If it's well below, the vehicle may have been sitting unused — check for perished rubber, corroded discs and stale fluids.
In terms of longevity, most Porsche Unknown models stay on UK roads for around 11 years. If you're buying one that's already approaching that window, the data suggests it has plenty of life left provided it's been maintained.
Before committing to a purchase, we recommend running a full vehicle history check on the specific car. This will reveal any outstanding finance, stolen markers, write-off history and mileage discrepancies that the seller may not disclose — and that the MOT data alone can't tell you.