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BMW vs Porsche Reliability

In our inspections, BMW’s average condition stays above the “decent” threshold to around 101k miles, about the same as Porsche at 98k.

Based on 343 BMWs and 130 Porsche vehicles. “Decent” means a condition score of 55/100.

vs
Head to head
BMWPorsche
Cars inspected343130
Average condition67/10069/100
In good shape (60+/100)66%71%
Holds up to (avg dips below decent)~101k mi~98k mi
Repainted or replaced panel71%77%
Structural repair found2%4%
Fault codes recently cleared27%20%

Green = the better number of the pair. Condition reflects the mix of cars that came to us — age, price, model — so treat small gaps as a tie.

How they score
BMW
Excellent 33% Good 33% Mediocre 19% Poor 15%
Porsche
Excellent 32% Good 39% Mediocre 20% Poor 8%
How long do they stay good?
Good cars by mileage
▬ BMW▬ Porsche▬ all cars
0 25 50 75 100 BMW, 0–20k mi: 97% in good shape (33 cars)BMW, 20–40k mi: 98% in good shape (62 cars)BMW, 40–60k mi: 86% in good shape (57 cars)BMW, 60–80k mi: 59% in good shape (56 cars)BMW, 80–100k mi: 49% in good shape (55 cars)BMW, 100–120k mi: 43% in good shape (37 cars)BMW, 120–140k mi: 19% in good shape (21 cars)BMW, 140–160k mi: 12%, drawn from the nearby bands (12 cars in this band) Porsche, 0–20k mi: 96%, drawn from the nearby bands (14 cars in this band)Porsche, 20–40k mi: 89% in good shape (36 cars)Porsche, 40–60k mi: 86% in good shape (28 cars)Porsche, 60–80k mi: 67%, drawn from the nearby bands (17 cars in this band)Porsche, 80–100k mi: 48%, drawn from the nearby bands (12 cars in this band)Porsche, 100–120k mi: 40%, drawn from the nearby bands (13 cars in this band) 40k 80k 120k 160k 200k mileage when we inspected it
Good cars by age
▬ BMW▬ Porsche▬ all cars
0 25 50 75 100 BMW, 1 years old: 98%, drawn from the nearby bands (15 cars this age)BMW, 2 years old: 96% in good shape (26 cars)BMW, 3 years old: 98%, drawn from the nearby bands (15 cars this age)BMW, 4 years old: 100% in good shape (30 cars)BMW, 5 years old: 94% in good shape (32 cars)BMW, 6 years old: 77% in good shape (35 cars)BMW, 7 years old: 58% in good shape (26 cars)BMW, 8 years old: 53% in good shape (30 cars)BMW, 9 years old: 52% in good shape (21 cars)BMW, 10 years old: 52%, drawn from the nearby bands (18 cars this age)BMW, 11 years old: 42%, drawn from the nearby bands (19 cars this age)BMW, 12 years old: 33%, drawn from the nearby bands (19 cars this age)BMW, 13 years old: 18%, drawn from the nearby bands (7 cars this age)BMW, 14 years old: 20%, drawn from the nearby bands (8 cars this age)BMW, 15 years old: 18%, drawn from the nearby bands (10 cars this age) Porsche, 2 years old: 100% in good shape (7 cars)Porsche, 3 years old: 100%, drawn from the nearby bands (7 cars this age)Porsche, 4 years old: 95%, drawn from the nearby bands (13 cars this age)Porsche, 5 years old: 92%, drawn from the nearby bands (11 cars this age)Porsche, 6 years old: 90%, drawn from the nearby bands (6 cars this age)Porsche, 7 years old: 78%, drawn from the nearby bands (12 cars this age)Porsche, 8 years old: 63%, drawn from the nearby bands (10 cars this age)Porsche, 9 years old: 58%, drawn from the nearby bands (11 cars this age)Porsche, 10 years old: 63%, drawn from the nearby bands (7 cars this age)Porsche, 11 years old: 51%, drawn from the nearby bands (6 cars this age)Porsche, 12 years old: 40%, drawn from the nearby bands (8 cars this age) 2y 4y 6y 8y 10y 12y 14y 16y vehicle age when we inspected it

Share in good shape (scoring 60+/100) by mileage and by age when we inspected them (each dot ≥5 cars; a band under 20 cars follows the nearby bands, so a run above the all-cars line stays above it, and a band of 20 or more uses the rate we measured; where a band has too few cars, the line follows the trend between the bands on either side; rolled-back odometers excluded from the mileage curve). Dashed grey = all cars we check.

Most common faults
BMW
Oil leaks · Engine
55%
Active error codes · Electronic equipment
36%
Tires condition & wear · Brakes and tires
34%
Low coolant / cooling system issues · Engine
27%
Leaking or worn shock absorbers · Suspension
17%
Porsche
Oil leaks · Engine
50%
Tires condition & wear · Brakes and tires
35%
Low coolant / cooling system issues · Engine
30%
Worn brake rotors · Brakes and tires
27%
Active error codes · Electronic equipment
24%
Trajectory by generation
BMW ▲ Newer BMWs are holding up better 40% 60% 80% 2012–14: 52% in good shape (age-adjusted; 34 cars, raw 53%) 52 2015–17: 66% in good shape (age-adjusted; 50 cars, raw 64%) 66 2018–20: 75% in good shape (age-adjusted; 52 cars, raw 81%) 75 2009–11 2012–14 2015–17 2018–20 2021+
Porsche

Not enough Porsches at the 5–10 year checkpoint yet to draw a generation trend.

Share in good shape when inspected at the same age (5–10 years, age-adjusted), by model-year generation; dashed = all-brand average. All brands →

FAQ
?
Which is more reliable, BMW or Porsche?
In our inspections, BMW’s average condition stays above the “decent” threshold to around 101k miles, about the same as Porsche at 98k.
?
What are the most common problems with used BMWs and Porsche vehicles?
On BMWs we flag oil leaks (55%), active error codes (36%), tires condition & wear (34%). On Porsche vehicles: oil leaks (50%), tires condition & wear (35%), low coolant / cooling system issues (30%).
?
How many BMW and Porsche vehicles have you inspected?
343 BMWs and 130 Porsche vehicles — 473 real pre-purchase inspections. Updated Nov 11, 2026.
?
How long do BMW and Porsche stay in decent condition?
In our data, decent is a 55/100 score. The average BMW dips below it around 101k mi; Porsche around 98k mi. Individual cars vary — get the one you’re buying inspected.
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Based on 473 inspections · updated Nov 11, 2026