Mercedes Sprinter 314 Premium CDI (2021)

Estimated running costs and MOT pass rates from 91 MOT tests in 2024.

Annual Cost

£2,631

£219/month

MOT Pass Rate

63%

Below Avg

Road Tax

£200

Standard rate/year

Est. Insurance

n/a

2143cc Diesel

Proceed With Caution

63% pass rate, £2,631/year to run. 19 points below average.

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Diesel2143cc5 years old91 tests54k miles avg

Annual Running Costs

Fuel (Diesel, 2143cc)

~40 mpg

£1,676

Road Tax

Car rate estimate; vans are taxed differently

£200

MOT Test

£55

Predicted Repairs

Higher estimate due to low pass rate

£700

Total per year£2,631

Per month£219/mo

Per week£51/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

63% MOT pass rate(Below Avg)

0%All-model avg: 82%100%

Below average reliability. Budget extra for maintenance and repairs. That's 19 points below the average of 82% across all models in our data. It falls below the Mercedes brand average of 87%.

63% of MOT tests on Mercedes Sprinter 314 Premium CDIs from 2021 ended in a pass in 2024, when they were about 3 years old. That's based on 91 tests across the UK, retests included. The average mileage recorded at those tests was 54,380 miles.

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How Does It Compare?

Rank among 2021 models3336th of 3,336(bottom 1%)

Rank among Mercedes models1366th of 1,376(bottom 1%)

vs average of all models-19%(82% avg)

vs 2021 models average-29%(92% avg)

vs Mercedes average-24%(87% avg)

Mileage Analysis

54,380

Average miles

22,200

Expected for age

The average 2021 Mercedes Sprinter 314 Premium CDI had 54,380 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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Similar Cars to Consider

Ford Transit Custom

2019 · 2000cc Diesel

£2,002/year

87%

+24%

Volkswagen Transporter

2019 · 1968cc Diesel

£2,002/year

88%

+25%

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About the 2021 Mercedes Sprinter 314 Premium CDI

The 2021 Mercedes Sprinter 314 Premium CDI is a van. Our records list a 2143cc diesel engine, though engines vary between versions. 91 MOT tests were recorded on this model in 2024, making it a rare model on UK roads. It sits in the bottom 1% of 2021 models for MOT pass rate.

With an average of 54,380 miles recorded at its 2024 MOT tests, Mercedes Sprinter 314 Premium CDI owners cover more miles than the average driver. High-mileage examples should be checked carefully for wear on suspension, brakes, and drivetrain components.

2021 Mercedes Sprinter 314 Premium CDI Fuel Costs

The 2143cc diesel engine offers a reasonable balance between performance and economy. Expect around 40 mpg in mixed driving, which works out to roughly £1,676 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 2021 Mercedes Sprinter 314 Premium CDI?

Total estimated annual running cost is £2,631 (£219/month), broken down as £1,676 fuel, £200 road tax, £55 MOT, and £700 predicted repairs. The higher repair estimate reflects the 63% MOT pass rate. Cars in this bracket tend to need work on suspension, brakes, and emissions components.

Buying a Used 2021 Mercedes Sprinter 314 Premium CDI

At 5 years old, the Mercedes Sprinter 314 Premium CDI 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 91 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.

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

Medium risk

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

Low risk

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

Dual Mass Flywheel

Medium risk

Larger diesel engines put extra strain on the dual mass flywheel. Listen for rattling at idle. Replacement with clutch is £800-£1,500.

Higher Than Average Failure Rate

Watch out

With a 63% MOT pass rate, this model fails more often than most. Budget for unexpected repairs and get a thorough pre-purchase inspection.

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 Mercedes Sprinter 314 Premium CDI 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
Mercedes Sprinter 314 Premium CDI(2021)	63%	£1,676	£200	n/a	£2,631
Ford Transit Custom(2019)	87%	£1,397	£200	n/a	£2,002-£629
Volkswagen Transporter(2019)	88%	£1,397	£200	n/a	£2,002-£629

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 Mercedes Sprinter 314 Premium CDI

Is the 2021 Mercedes Sprinter 314 Premium CDI reliable?

Below average reliability. Budget extra for maintenance and repairs. 63% of MOT tests on 2021 Mercedes Sprinter 314 Premium CDIs ended in a pass, from 91 tests (DVSA MOT data for tests in 2024, retests included). That's 19 points below the average of 82% across all models in the same data.

How much does a 2021 Mercedes Sprinter 314 Premium CDI cost to run?

Our estimate is £2,631 a year (£219 a month): £1,676 fuel, £200 road tax, £55 MOT and £700 predicted repairs, based on 7,400 miles a year. Insurance is not included.

What is the MOT pass rate for a 2021 Mercedes Sprinter 314 Premium CDI?

63% of 91 MOT tests on the 2021 Mercedes Sprinter 314 Premium CDI ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 3336th of 3,336 models first registered in 2021 (bottom 1%).

What is the average mileage for a 2021 Mercedes Sprinter 314 Premium CDI?

The average mileage recorded at MOT tests on the 2021 Mercedes Sprinter 314 Premium CDI is 54,380 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.