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Porsche 911 vs Porsche 911 s: reliability comparison

MOT pass rates, common faults and mileage compared from real UK MOT data.

Porsche 911
85%
MOT pass rate · 74,656 vehicles
Porsche 911 s
75%
MOT pass rate · 20 vehicles
Verdict: On MOT pass rate the Porsche 911 (85%) and Porsche 911 s (75%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Porsche 911 Porsche 911 s
MOT pass rate 85% ✓ 75%
MOT failure rate 15% ✓ 25%
Faults & advisories per test 1.1 ✓ 1.6
Dangerous-fault share 1% 1%
Average mileage 70,982 mi 55,167 mi
Sample size (vehicles) 74,656 20

Most common faults

Porsche 911

  1. Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
  2. Offside Rear Tyre worn close to the legal limit (4.1.E.1)
  3. Under-trays fitted obscuring some underside components
  4. Nearside Front Tyre worn close to the legal limit (4.1.E.1)
  5. Offside Front Tyre worn close to the legal limit (4.1.E.1)
  6. Oil leak, but not excessive (8.4.1 (a) (i))

Porsche 911 s

  1. Nearside Front wheel bearing has slight play (2.5.A.3c)
  2. Offside Front wheel bearing has slight play (2.5.A.3c)
  3. Windscreen washer provides insufficient washer liquid (8.2.3)
  4. Oil leak
  5. Nearside Rear Anti-roll bar linkage has slight play in a pin/bush (2.4.G.2)
  6. Nearside Rear Direction indicator slightly discoloured (1.4.A.2f)

Reliability FAQ

On MOT pass rate the Porsche 911 (85%) and Porsche 911 s (75%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Porsche 911 report Full Porsche 911 s report Most reliable cars

Pass rates are computed over completed (pass/fail) MOT tests. Reliability also depends on age, mileage and upkeep — see each model's page for the full picture.