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Kia vs Porsche Reliability

Nearly a tie: Kia averages 70/100 vs Porsche at 69/100 across 272 real pre-purchase inspections (143 Kia / 129 Porsche). 70% of Kias and 72% of Porsche vehicles scored 60/100 or higher. The average car we check scores 61/100.

vs
Head to head
KiaPorsche
Cars inspected143129
Average condition70/10069/100
In good shape (60+/100)70%72%
Holds up to (avg dips below decent)~124k mi~98k mi
Repainted or replaced panel68%77%
Structural repair found1%4%
Fault codes recently cleared22%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
Kia
Excellent 43% Good 27% Mediocre 20% Poor 11%
Porsche
Excellent 33% Good 39% Mediocre 20% Poor 9%
How long do they stay good?
Good cars by mileage
▬ Kia▬ Porsche▬ all cars
0 25 50 75 100 Kia, 0–20k mi: 100% in good shape (11 cars)Kia, 20–40k mi: 88% in good shape (26 cars)Kia, 40–60k mi: 85%, drawn from the nearby bands (13 cars in this band)Kia, 60–80k mi: 70% in good shape (27 cars)Kia, 80–100k mi: 61% in good shape (23 cars)Kia, 100–120k mi: 48%, drawn from the nearby bands (18 cars in this band)Kia, 120–140k mi: 43%, drawn from the nearby bands (6 cars in this band)Kia, 140–160k mi: 33%, drawn from the nearby bands (10 cars in this band)Kia, 160–180k mi: 29%, drawn from the nearby bands (6 cars in this band) Porsche, 0–20k mi: 97%, drawn from the nearby bands (13 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: 49%, drawn from the nearby bands (12 cars in this band)Porsche, 100–120k mi: 39%, drawn from the nearby bands (13 cars in this band) 40k 80k 120k 160k 200k mileage when we inspected it
Good cars by age
▬ Kia▬ Porsche▬ all cars
0 25 50 75 100 Kia, 1 years old: 95%, drawn from the nearby bands (11 cars this age)Kia, 2 years old: 94%, drawn from the nearby bands (15 cars this age)Kia, 3 years old: 90% in good shape (21 cars)Kia, 4 years old: 77%, drawn from the nearby bands (9 cars this age)Kia, 5 years old: 69%, drawn from the nearby bands (10 cars this age)Kia, 6 years old: 59%, drawn from the nearby bands (14 cars this age)Kia, 7 years old: 58%, drawn from the nearby bands (16 cars this age)Kia, 8 years old: 58%, drawn from the nearby bands (15 cars this age)Kia, 9 years old: 50%, drawn from the nearby bands (10 cars this age)Kia, 10 years old: 53%, drawn from the nearby bands (6 cars this age)Kia, 11 years old: 71%, drawn from the nearby bands (5 cars this age) Porsche, 2 years old: 100% in good shape (6 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: 89%, 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: 62%, 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: 41%, 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
Kia
Oil leaks · Engine
45%
Tires condition & wear · Brakes and tires
34%
Fuel trim out of range · Engine
31%
Low coolant / cooling system issues · Engine
22%
Active error codes · Electronic equipment
16%
Porsche
Oil leaks · Engine
50%
Tires condition & wear · Brakes and tires
36%
Low coolant / cooling system issues · Engine
30%
Worn brake rotors · Brakes and tires
27%
Active error codes · Electronic equipment
24%
FAQ
?
Which is more reliable, Kia or Porsche?
Nearly a tie: Kia averages 70/100 vs Porsche at 69/100 across 272 real pre-purchase inspections (143 Kia / 129 Porsche). 70% of Kias and 72% of Porsche vehicles scored 60/100 or higher.
?
What are the most common problems with used Kias and Porsche vehicles?
On Kias we flag oil leaks (45%), tires condition & wear (34%), fuel trim out of range (31%). On Porsche vehicles: oil leaks (50%), tires condition & wear (36%), low coolant / cooling system issues (30%).
?
How many Kia and Porsche vehicles have you inspected?
143 Kias and 129 Porsche vehicles — 272 real pre-purchase inspections. Updated Oct 27, 2026.
?
How long do Kias and Porsche vehicles stay in good shape?
In our data, the average Kia dips below “decent” around ~124k mi; Porsche around ~98k mi. Individual cars vary — get the one you’re buying inspected.
Buying a used Kia or Porsche? Get a pre-purchase inspection before you pay.
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Based on 272 inspections · updated Oct 27, 2026