CarCostCheck

PEUGEOT 508 (2018)

Running costs, common problems, and reliability data based on 1,026 real MOT tests in 2024.

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MOT Pass Rate

95%

Total Tests (2024)

1,026

Avg Mileage

44,103 mi

Est. Annual Cost

£1,482

Is the 2018 PEUGEOT 508 reliable?

Excellent reliability. Very few MOT failures. That's 13 points above the national average of 82%. It also outperforms the PEUGEOT brand average of 83%.

At 6 years old, 95% of PEUGEOT 508s from 2018 passed their MOT first time in 2024. That's based on 1,026 tests across the UK. The average mileage at this age is 44,103 miles.

How does the 2018 PEUGEOT 508 compare?

Rank among all 2018 cars108th out of 649(top 17%)
Rank among all PEUGEOT models67th out of 726(top 9%)
vs national average+13% (82% avg)
vs 2018 cars average+6% (89% avg)
vs PEUGEOT average+12% (83% avg)

Mileage Analysis

The average 2018 PEUGEOT 508 has 44,103 miles on the clock, which is in line with the expected 44,400 miles for a 6-year-old car, suggesting normal everyday use.

How much does a 2018 PEUGEOT 508 cost to run?

⛽Fuel (Diesel, 1997cc)
£1,037
🏛️Road Tax
£190
🔧MOT Test
£55
🛠️Predicted Repairs
£200
Total per year£1,482
Per month£124/mo

Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT pass rate data. Insurance not included.

PEUGEOT 508 by Year

YearPass RateTestsAvg Mileage
202188%1,94835,816 mi
202087%2,66247,497 mi
201989%4,92847,447 mi
201895%1,02644,103 mi
201785%76576,001 mi
201681%1,67684,224 mi
201581%1,97496,741 mi
201480%2,630104,798 mi
201377%5,473114,840 mi
201278%6,805124,465 mi
201178%4,763126,235 mi

Checking a specific PEUGEOT 508?

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About the 2018 PEUGEOT 508

The 2018 PEUGEOT 508 is a family car with a 1997cc diesel engine. 1,026 of these vehicles were MOT tested in 2024, making it a reasonably common sight on UK roads. It ranks in the top 17% of all 2018 cars for reliability.

With an average of 44,103 miles at 6 years old, PEUGEOT 508 owners drive about as much as the UK average.

2018 PEUGEOT 508 Fuel Costs

The 1997cc diesel engine offers a reasonable balance between performance and economy. Expect around 48 mpg in mixed driving, which works out to roughly £1,037 per year at current diesel prices of 148p per litre (based on 7,400 miles per year). Diesel cars of this age should have their DPF (diesel particulate filter) checked, as replacements can be costly.

What does it cost to own a 2018 PEUGEOT 508?

Total estimated annual running cost is £1,482 (£124/month), broken down as £1037 fuel, £190 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 95% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.

PEUGEOT 508 Reliability Trend

Newer PEUGEOT 508s show better MOT pass rates than older ones, with an average improvement of 9 percentage points.

Buying a Used 2018 PEUGEOT 508

At 6 years old, the PEUGEOT 508 offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost.

Alternatives to the 2018 PEUGEOT 508

The PEUGEOT 508 is actually the most reliable option among similar diesel family cars from this era. Here are comparable diesel cars with similar engines: