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Buick vs Lexus Reliability

Nearly a tie: Buick averages 58/100 vs Lexus at 60/100 across 342 real pre-purchase inspections (38 Buick / 304 Lexus). 52% of Buicks and 57% of Lexus vehicles scored 60/100 or higher. The average car we check scores 61/100.

vs
Head to head
BuickLexus
Cars inspected38304
Average condition58/10060/100
In good shape (60+/100)52%57%
Repainted or replaced panel71%82%
Structural repair found0%3%
Fault codes recently cleared24%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
Buick
Excellent 26% Good 26% Mediocre 18% Poor 29%
Lexus
Excellent 25% Good 32% Mediocre 20% Poor 23%
How long do they stay good?
Good cars by mileage
▬ Buick▬ Lexus▬ all cars
0 25 50 75 100 Buick, 40–60k mi: 64%, drawn from the nearby bands (8 cars in this band)Buick, 60–80k mi: 65%, drawn from the nearby bands (5 cars in this band)Buick, 80–100k mi: 52%, drawn from the nearby bands (6 cars in this band)Buick, 100–120k mi: 32%, drawn from the nearby bands (5 cars in this band) Lexus, 0–20k mi: 100% in good shape (10 cars)Lexus, 20–40k mi: 94% in good shape (31 cars)Lexus, 40–60k mi: 91% in good shape (33 cars)Lexus, 60–80k mi: 67% in good shape (27 cars)Lexus, 80–100k mi: 73% in good shape (45 cars)Lexus, 100–120k mi: 56% in good shape (34 cars)Lexus, 120–140k mi: 36% in good shape (36 cars)Lexus, 140–160k mi: 29% in good shape (31 cars)Lexus, 160–180k mi: 15% in good shape (26 cars)Lexus, 180–200k mi: 19%, drawn from the nearby bands (10 cars in this band)Lexus, 200–220k mi: 25% in good shape (8 cars) 40k 80k 120k 160k 200k mileage when we inspected it
Good cars by age
▬ Buick▬ Lexus▬ all cars
0 25 50 75 100 Lexus, 2 years old: 93%, drawn from the nearby bands (8 cars this age)Lexus, 3 years old: 93%, drawn from the nearby bands (18 cars this age)Lexus, 4 years old: 83% in good shape (24 cars)Lexus, 5 years old: 81%, drawn from the nearby bands (12 cars this age)Lexus, 6 years old: 80% in good shape (10 cars)Lexus, 7 years old: 81%, drawn from the nearby bands (13 cars this age)Lexus, 8 years old: 90% in good shape (20 cars)Lexus, 9 years old: 76% in good shape (21 cars)Lexus, 10 years old: 74%, drawn from the nearby bands (13 cars this age)Lexus, 11 years old: 67% in good shape (21 cars)Lexus, 12 years old: 48% in good shape (25 cars)Lexus, 13 years old: 41% in good shape (27 cars)Lexus, 14 years old: 35%, drawn from the nearby bands (13 cars this age)Lexus, 15 years old: 31%, drawn from the nearby bands (18 cars this age)Lexus, 16 years old: 24%, drawn from the nearby bands (13 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
Buick
Oil leaks · Engine
61%
Tires condition & wear · Brakes and tires
45%
Fuel trim out of range · Engine
37%
Active error codes · Electronic equipment
34%
Oil leaks · Automatic transmission
24%
Lexus
Oil leaks · Engine
53%
Fuel trim out of range · Engine
36%
Tires condition & wear · Brakes and tires
35%
Active error codes · Electronic equipment
33%
Low coolant / cooling system issues · Engine
25%
Trajectory by generation
Buick

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

Lexus ▲ Newer Lexus vehicles are holding up better 40% 60% 80% 2012–14: 66% in good shape (age-adjusted; 19 cars, raw 63%) 66 2015–17: 85% in good shape (age-adjusted; 47 cars, raw 81%) 85 2018–20: 85% in good shape (age-adjusted; 20 cars, raw 90%) 85 2009–11 2012–14 2015–17 2018–20 2021+

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, Buick or Lexus?
Nearly a tie: Buick averages 58/100 vs Lexus at 60/100 across 342 real pre-purchase inspections (38 Buick / 304 Lexus). 52% of Buicks and 57% of Lexus vehicles scored 60/100 or higher.
?
What are the most common problems with used Buicks and Lexus vehicles?
On Buicks we flag oil leaks (61%), tires condition & wear (45%), fuel trim out of range (37%). On Lexus vehicles: oil leaks (53%), fuel trim out of range (36%), tires condition & wear (35%).
?
How many Buick and Lexus vehicles have you inspected?
38 Buicks and 304 Lexus vehicles — 342 real pre-purchase inspections. Updated Oct 27, 2026.
?
Should I still get a pre-purchase inspection?
Yes. Badge averages don't sort the good car from the tired one. We still find repainted panels on 71% of Buicks and 82% of Lexus vehicles, and recently cleared fault codes on 24% / 20%.
Buying a used Buick or Lexus? Get a pre-purchase inspection before you pay.
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Based on 342 inspections · updated Oct 27, 2026