Peugeot 508 (2018)

Estimated running costs and MOT pass rates from 1,026 MOT tests in 2024.

Annual Cost

£1,852

£154/month

MOT Pass Rate

95%

Excellent

Road Tax

£200

Standard rate/year

Est. Insurance

Grp 18-32

1997cc Diesel

Great Choice

95% pass rate, £1,852/year to run. 13 points above average.

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Diesel1997cc8 years old1,026 tests44k miles avg

Annual Running Costs

Fuel (Diesel, 1997cc)

~48 mpg

£1,397

Road Tax

Standard rate (from April 2017)

£200

MOT Test

£55

Predicted Repairs

Low estimate due to excellent reliability

£200

Total per year£1,852

Per month£154/mo

Per week£36/wk

Estimates based on 7,400 miles/year (UK average), diesel at 199.33p a litre (GOV.UK weekly average, week of 19 October 2026), GOV.UK road tax rates and repair likelihood from MOT data. Insurance not included. Cars registered from April 2017 pay the £200 standard rate, plus £440 a year for five years (from the second year) if they cost over £40,000 new (over £50,000 for electric cars).

Reliability Verdict

95% MOT pass rate(Excellent)

0%All-model avg: 82%100%

Excellent reliability. Very few MOT failures. That's 13 points above the average of 82% across all models in our data. It also outperforms the Peugeot brand average of 83%.

95% of MOT tests on Peugeot 508s from 2018 ended in a pass in 2024, when they were about 6 years old. That's based on 1,026 tests across the UK, retests included. The average mileage recorded at those tests was 44,103 miles.

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How Does It Compare?

Rank among 2018 models97th of 607(top 16%)

Rank among Peugeot models67th of 709(top 10%)

vs average of all models+13%(82% avg)

vs 2018 models average+6%(89% avg)

vs Peugeot average+12%(83% avg)

Mileage Analysis

44,103

Average miles

44,400

Expected for age

The average 2018 Peugeot 508 had 44,103 miles on the clock at its 2024 MOT, which is in line with the expected 44,400 miles for a 6-year-old car, suggesting normal everyday use.

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Peugeot 508 by Year

Year	Pass Rate	Tests	Avg Mileage
2021	88%	1,948	35,816 mi
2020	87%	2,662	47,497 mi
2019	89%	4,928	47,447 mi
2018	95%	1,026	44,103 mi
2017	85%	765	76,001 mi
2016	81%	1,676	84,224 mi
2015	81%	1,974	96,741 mi
2014	80%	2,630	104,798 mi
2013	77%	5,473	114,840 mi
2012	78%	6,805	124,465 mi
2011	78%	4,763	126,235 mi

Similar Cars to Consider

Volkswagen Golf

2017 · 1598cc Diesel

£1,674/year

91%

-4%

Ford Focus

2019 · 1499cc Diesel

£1,824/year

89%

-6%

Volkswagen Polo

2018 · 1598cc Diesel

£1,824/year

84%

-11%

Audi A3

2016 · 1598cc Diesel

£1,644/year

90%

-5%

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About the 2018 Peugeot 508

The 2018 Peugeot 508 is a family car. Our records list a 1997cc diesel engine, though engines vary between versions. 1,026 MOT tests were recorded on this model in 2024, making it a reasonably common sight on UK roads. It ranks in the top 16% of all 2018 models for MOT pass rate.

With an average of 44,103 miles recorded at its 2024 MOT tests, 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 £1,397 per year with diesel at 199.33p per litre (GOV.UK weekly average, week of 19 October 2026; 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 £1,852 (£154/month), broken down as £1,397 fuel, £200 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 pass their MOT more often than older ones, by 9 percentage points on average, which is mostly down to age and wear.

Buying a Used 2018 Peugeot 508

At 8 years old, this is a solid used buy if you find one with good service history. Depreciation has levelled off, so you won't lose much more value. Focus on condition over mileage.

Common Issues to Watch For

These are typical issues for cars of this age, fuel type and engine size, not faults recorded on this model's MOT tests. Use them as a checklist when you view one.

DPF (Diesel Particulate Filter)

Watch out

Short journeys clog the DPF. Replacement costs £1,000-£2,500. Check the DPF warning light and ask about driving patterns.

Turbo Wear

Watch out

Diesel turbos work harder and wear faster. Listen for whining noises and check for oil leaks around the turbo housing.

AdBlue System

Medium risk

Post-2015 diesels use AdBlue for emissions. Sensor failures and tank heater issues are common. Budget £200-£500 for repairs.

EGR Valve

Watch out

Exhaust Gas Recirculation valves clog with carbon deposits, causing rough running and poor economy. Cleaning costs £150-£300, replacement £300-£600.

Suspension Wear

Medium risk

Shock absorbers, springs, and anti-roll bar links typically need attention around this age. Listen for clunks over bumps and check for uneven tyre wear.

Service History

Low risk

Always request a full service history. Regular servicing is the single best indicator of how well a car has been maintained, regardless of mileage.

Running Costs Compared

How the 2018 Peugeot 508 stacks up against similar cars for estimated annual running costs, insurance group, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Est. Ins. Group	Total/yr
Peugeot 508(2018)	95%	£1,397	£200	Grp 18-32	£1,852
Volkswagen Golf(2017)	91%	£1,219	£200	Grp 12-25	£1,674-£178
Ford Focus(2019)	89%	£1,219	£200	Grp 12-25	£1,824-£28
Volkswagen Polo(2018)	84%	£1,219	£200	Grp 12-25	£1,824-£28
Audi A3(2016)	90%	£1,219	£170	Grp 12-25	£1,644-£208

Estimates based on 7,400 miles/year, GOV.UK average pump prices for the week of 19 October 2026, GOV.UK road tax rates and MOT data. Insurance groups are our rough estimate from engine size, not official groups. Actual costs vary by driver, location, and usage.

Questions about the 2018 Peugeot 508

Is the 2018 Peugeot 508 reliable?

Excellent reliability. Very few MOT failures. 95% of MOT tests on 2018 Peugeot 508s ended in a pass, from 1,026 tests (DVSA MOT data for tests in 2024, retests included). That's 13 points above the average of 82% across all models in the same data.

How much does a 2018 Peugeot 508 cost to run?

Our estimate is £1,852 a year (£154 a month): £1,397 fuel, £200 road tax, £55 MOT and £200 predicted repairs, based on 7,400 miles a year. Insurance is not included.

What is the MOT pass rate for a 2018 Peugeot 508?

95% of 1,026 MOT tests on the 2018 Peugeot 508 ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 97th of 607 models first registered in 2018 (top 16%).

Which year Peugeot 508 has the best MOT pass rate?

Of the years with at least 100 tests, the 2018 Peugeot 508 has the highest MOT pass rate at 95% and the 2013 the lowest at 77%. Newer cars usually pass more often simply because they are younger and have done fewer miles.

What is the average mileage for a 2018 Peugeot 508?

The average mileage recorded at MOT tests on the 2018 Peugeot 508 is 44,103 miles, which is in line with the expected 44,400 miles for a 6-year-old car, suggesting normal everyday use.