Peugeot 508 Allure S/S PHEV Auto (2021)

Estimated running costs and MOT pass rates from 64 MOT tests in 2024.

Annual Cost

£2,003

£167/month

MOT Pass Rate

84%

Good

Road Tax

£200

Standard rate/year

Est. Insurance

Grp 12-25

1600cc Hybrid

Solid Option

84% pass rate, £2,003/year to run. Close to the average across all models.

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Hybrid1600cc5 years old64 tests44k miles avg

Annual Running Costs

Fuel (Hybrid, 1600cc)

~42 mpg (petrol-engine estimate; hybrids usually use less)

£1,398

Road Tax

Standard rate (from April 2017)

£200

MOT Test

£55

Predicted Repairs

£350

Total per year£2,003

Per month£167/mo

Per week£39/wk

Estimates based on 7,400 miles/year (UK average), petrol at 174.57p 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

84% MOT pass rate(Good)

0%All-model avg: 82%100%

Good reliability. Occasional issues but generally solid. That's close to the average of 82% across all models in our data.

84% of MOT tests on Peugeot 508 Allure S/S PHEV Autos from 2021 ended in a pass in 2024, when they were about 3 years old. That's based on 64 tests across the UK, retests included. The average mileage recorded at those tests was 44,380 miles.

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How Does It Compare?

Rank among 2021 models3142nd of 3,336(bottom 6%)

Rank among Peugeot models394th of 709(bottom half)

vs average of all models+2%(82% avg)

vs 2021 models average-8%(92% avg)

vs Peugeot average+1%(83% avg)

Mileage Analysis

44,380

Average miles

22,200

Expected for age

The average 2021 Peugeot 508 Allure S/S PHEV Auto had 44,380 miles on the clock at its 2024 MOT, which is well above the expected 22,200 miles for a 3-year-old car. Check service history carefully, as high-mileage cars need consistent maintenance to stay reliable.

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Peugeot 508 Allure S/S PHEV Auto by Year

Year	Pass Rate	Tests	Avg Mileage
2021	84%	64	44,380 mi
2020	86%	152	40,092 mi

Similar Cars to Consider

Toyota Yaris

2019 · 1497cc Hybrid

£1,853/year

93%

+9%

MINI Cooper S

2019 · 1499cc Hybrid

£1,853/year

92%

+8%

Land Rover Range Rover Sport

2019 · 1997cc Hybrid

£2,086/year

94%

+10%

Toyota Prius

2019 · 1797cc Hybrid

£2,086/year

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+10%

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About the 2021 Peugeot 508 Allure S/S PHEV Auto

The 2021 Peugeot 508 Allure S/S PHEV Auto is a small family car. Our records list a 1600cc hybrid engine, though engines vary between versions. 64 MOT tests were recorded on this model in 2024, making it a rare model on UK roads. It sits in the bottom 6% of 2021 models for MOT pass rate.

With an average of 44,380 miles recorded at its 2024 MOT tests, Peugeot 508 Allure S/S PHEV Auto owners cover more miles than the average driver. High-mileage examples should be checked carefully for wear on suspension, brakes, and drivetrain components.

2021 Peugeot 508 Allure S/S PHEV Auto Fuel Costs

The 1600cc hybrid engine offers a reasonable balance between performance and economy. Our estimate uses around 42 mpg, the figure for a petrol engine of this size, which works out to roughly £1,398 per year with petrol at 174.57p per litre (GOV.UK weekly average, week of 19 October 2026; based on 7,400 miles per year). As a hybrid it should use less than that, and real-world fuel costs depend a lot on how much electric-only driving you do.

What does it cost to own a 2021 Peugeot 508 Allure S/S PHEV Auto?

Total estimated annual running cost is £2,003 (£167/month), broken down as £1,398 fuel, £200 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 84% pass rate. Keeping on top of servicing will help avoid surprises.

Buying a Used 2021 Peugeot 508 Allure S/S PHEV Auto

At 5 years old, the Peugeot 508 Allure S/S PHEV Auto offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost. Note: with only 64 tests in our data, these figures should be treated as indicative rather than definitive.

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.

Hybrid Battery Health

Medium risk

After 5 years, hybrid battery capacity may have reduced. A full replacement costs £2,000-£4,000, though reconditioning is cheaper at £500-£1,500.

Inverter and Power Electronics

Low risk

The inverter converts DC to AC for the electric motor. Failures are expensive (£1,500+) but relatively rare. Listen for unusual buzzing sounds.

Regenerative Braking

Medium risk

Brake discs can corrode from reduced use (the electric motor handles most braking). Surface rust is normal but deep pitting needs attention.

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 2021 Peugeot 508 Allure S/S PHEV Auto 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 Allure S/S PHEV Auto(2021)	84%	£1,398	£200	Grp 12-25	£2,003
Toyota Yaris(2019)	93%	£1,398	£200	Grp 12-25	£1,853-£150
MINI Cooper S(2019)	92%	£1,398	£200	Grp 12-25	£1,853-£150
Land Rover Range Rover Sport(2019)	94%	£1,631	£200	Grp 18-32	£2,086+£83
Toyota Prius(2019)	94%	£1,631	£200	Grp 18-32	£2,086+£83

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 2021 Peugeot 508 Allure S/S PHEV Auto

Is the 2021 Peugeot 508 Allure S/S PHEV Auto reliable?

Good reliability. Occasional issues but generally solid. 84% of MOT tests on 2021 Peugeot 508 Allure S/S PHEV Autos ended in a pass, from 64 tests (DVSA MOT data for tests in 2024, retests included). That's 2 points above the average of 82% across all models in the same data.

How much does a 2021 Peugeot 508 Allure S/S PHEV Auto cost to run?

Our estimate is £2,003 a year (£167 a month): £1,398 fuel, £200 road tax, £55 MOT and £350 predicted repairs, based on 7,400 miles a year. Insurance is not included.

What is the MOT pass rate for a 2021 Peugeot 508 Allure S/S PHEV Auto?

84% of 64 MOT tests on the 2021 Peugeot 508 Allure S/S PHEV Auto ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 3142nd of 3,336 models first registered in 2021 (bottom 6%).

What is the average mileage for a 2021 Peugeot 508 Allure S/S PHEV Auto?

The average mileage recorded at MOT tests on the 2021 Peugeot 508 Allure S/S PHEV Auto is 44,380 miles, which is well above the expected 22,200 miles for a 3-year-old car. Check service history carefully, as high-mileage cars need consistent maintenance to stay reliable.