How much does a 2008 BMW 635 cost to run?

Estimated annual running cost is £2,045 (£170/month), including £1245 fuel, £395 road tax, £55 MOT, and £350 predicted repairs.

What is the MOT pass rate for a 2008 BMW 635?

The 2008 BMW 635 has a 82% MOT pass rate based on 1,312 tests in 2026. This ranks 165 out of 589 cars from 2008.

Which year BMW 635 is most reliable?

The 2010 BMW 635 has the highest MOT pass rate at 86%. The least reliable year is 2008 at 82%.

What is the average mileage for a 2008 BMW 635?

The average mileage for a 2008 BMW 635 is 132,952 miles, which is in line with the expected 133,200 miles for a 18-year-old car, suggesting normal everyday use.

BMW 635 (2008)

Q: Is the 2008 BMW 635 reliable?

Good reliability. Occasional issues but generally solid. 82% of BMW 635s from 2008 passed their MOT first time in 2026, based on 1,312 tests. That's 0 points above the national average of 82%.

Running costs, reliability data, and common problems from 1,312 real MOT tests.

Annual Cost

£2,045

£170/month

MOT Pass Rate

82%

Good

Road Tax

£395

Based on CC/year

Insurance

Grp 30-42

2993cc Diesel

Solid Option

82% pass rate, £2045/year to run. Close to the national average.

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Diesel2993cc18 years old1,312 tests133k miles avg

Annual Running Costs

Fuel (Diesel, 2993cc)

~40 mpg

£1,245

Road Tax

Based on 2993cc

£395

MOT Test

£55

Predicted Repairs

£350

Total per year£2,045

Per month£170/mo

Per week£39/wk

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

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Reliability Verdict

82% MOT pass rate(Good)

0%National avg: 82%100%

Good reliability. Occasional issues but generally solid. That's close to the national average of 82%. It falls below the BMW brand average of 88%.

At 18 years old, 82% of BMW 635s from 2008 passed their MOT first time in 2026. That's based on 1,312 tests across the UK. The average mileage at this age is 132,952 miles.

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How Does It Compare?

Rank among 2008 cars165th of 589(top 28%)

Rank among BMW models1257th of 1,564(top 80%)

vs national average+0%(82% avg)

vs 2008 cars average+9%(73% avg)

vs BMW average-6%(88% avg)

Mileage Analysis

132,952

Average miles

133,200

Expected for age

The average 2008 BMW 635 has 132,952 miles on the clock, which is in line with the expected 133,200 miles for a 18-year-old car, suggesting normal everyday use.

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Best Year to Buy?

The most reliable year is the 2010 model with a 86% MOT pass rate, while the 2008 model has the lowest at 82%. Consider a different year if reliability is a priority.

BMW 635 by Year

Year	Pass Rate	Tests	Avg Mileage
2010	86%	1,060	114,691 mi
2009	86%	1,018	124,198 mi
2008	82%	1,312	132,952 mi
2007	85%	460	141,392 mi
1990	79%	47	101,349 mi

Similar Cars to Consider

BMW 3 SERIES

2008 · 2926cc Diesel

£1,900/year

80%

-2%

AUDI A5

2010 · 2967cc Diesel

£1,900/year

82%

same

JAGUAR XF

2010 · 2993cc Diesel

£1,900/year

80%

-2%

LAND ROVER DISCOVERY

2006 · 2495cc Diesel

£2,050/year

78%

-4%

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About the 2008 BMW 635

The 2008 BMW 635 is a premium performance with a 2993cc diesel engine. 1,312 of these vehicles were MOT tested in 2026, making it a reasonably common sight on UK roads. Among all cars from 2008, the average MOT pass rate is 73%, and this model beats that benchmark.

With an average of 132,952 miles at 18 years old, BMW 635 owners drive about as much as the UK average.

2008 BMW 635 Fuel Costs

The 2993cc diesel engine is on the larger side, so fuel won't be this car's strong point. Expect around 40 mpg in mixed driving, which works out to roughly £1,245 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 2008 BMW 635?

Total estimated annual running cost is £2,045 (£170/month), broken down as £1245 fuel, £395 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 82% pass rate. Keeping on top of servicing will help avoid surprises.

BMW 635 Reliability Trend

The BMW 635 has maintained consistent MOT pass rates across model years, varying by only 3 percentage points.

Buying a Used 2008 BMW 635

At 18 years old, the BMW 635 is firmly in budget territory. Purchase prices are low, but check for rust, worn suspension bushes, and electrical gremlins. A full service history is especially valuable at this age.

Common Issues to Watch For

Based on the 2008 BMW 635's fuel type, age, and engine size, these are the most likely problem areas to check.

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.

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.

Dual Mass Flywheel

Watch out

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

Rust and Corrosion

Watch out

At 10+ years, check wheel arches, sills, subframe, and brake lines for rust. Structural corrosion is an MOT failure. Prevention is far cheaper than repair.

Suspension Bushings

Watch out

Rubber suspension bushes harden and crack with age, causing knocking noises and vague handling. A full refresh costs £300-£800 depending on the car.

Clutch Wear

Watch out

With an average of 133k miles, clutch replacement may be due (typical lifespan 60,000-100,000 miles). Budget £400-£800 for a new clutch kit.

Brake Discs and Pads

Medium risk

High-mileage cars often need brake disc replacement, not just pads. A full set of discs and pads costs £200-£500 per axle.

Engine Mounts

Medium risk

Worn engine mounts cause excessive vibration and movement. Replacement costs £150-£400 per mount. Check for vibration at idle with the bonnet open.

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 2008 BMW 635 stacks up against similar cars for annual running costs, insurance, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Insurance	Total/yr
BMW 635(2008)	82%	£1245	£395	Grp 30-42	£2045
BMW 3 SERIES(2008)	80%	£1245	£250	Grp 30-42	£1900-£145
AUDI A5(2010)	82%	£1245	£250	Grp 30-42	£1900-£145
JAGUAR XF(2010)	80%	£1245	£250	Grp 30-42	£1900-£145
LAND ROVER DISCOVERY(2006)	78%	£1245	£250	Grp 25-38	£2050+£5

Estimates based on 7,400 miles/year, current fuel prices, and MOT data. Insurance groups are indicative. Actual costs vary by driver, location, and usage.