BMW 645 (2005)

Estimated running costs and MOT pass rates from 1,061 MOT tests in 2024.

Annual Cost

£3,153

£263/month

MOT Pass Rate

86%

Good

Road Tax

£790

Estimated/year

Est. Insurance

Grp 35-50

4398cc Petrol

Solid Option

86% pass rate, £3,153/year to run. Close to the average across all models.

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Petrol4398cc21 years old1,061 tests104k miles avg

Annual Running Costs

Fuel (Petrol, 4398cc)

~30 mpg

£1,958

Road Tax

Estimated CO2 band

£790

MOT Test

£55

Predicted Repairs

£350

Total per year£3,153

Per month£263/mo

Per week£61/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.

Reliability Verdict

86% 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.

86% of MOT tests on BMW 645s from 2005 ended in a pass in 2024, when they were about 19 years old. That's based on 1,061 tests across the UK, retests included. The average mileage recorded at those tests was 103,715 miles.

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How Does It Compare?

Rank among 2005 models71st of 504(top 15%)

Rank among BMW models1064th of 1,548(bottom half)

vs average of all models+4%(82% avg)

vs 2005 models average+14%(72% avg)

vs BMW average-2%(88% avg)

Mileage Analysis

103,715

Average miles

140,600

Expected for age

The average 2005 BMW 645 had 103,715 miles on the clock at its 2024 MOT, which is below the expected 140,600 miles for a 19-year-old car. This suggests lighter use than average, which generally means less wear on major components.

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BMW 645 by Year

Year	Pass Rate	Tests	Avg Mileage
2011	85%	52	76,143 mi
2005	86%	1,061	103,715 mi
2004	83%	2,538	105,730 mi

Similar Cars to Consider

BMW X5

2005 · 4799cc Petrol

£3,303/year

77%

-9%

Land Rover Range Rover

2006 · 4197cc Petrol

£3,153/year

80%

-6%

Land Rover Range Rover Sport

2005 · 4394cc Petrol

£3,153/year

82%

-4%

Volvo XC90

2006 · 4414cc Petrol

£3,303/year

73%

-13%

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About the 2005 BMW 645

The 2005 BMW 645 is a premium performance car. Our records list a 4398cc petrol engine, though engines vary between versions. 1,061 MOT tests were recorded on this model in 2024, making it a reasonably common sight on UK roads. It ranks in the top 15% of all 2005 models for MOT pass rate.

With an average of 103,715 miles recorded at its 2024 MOT tests, BMW 645 owners tend to use this car less than the typical driver.

2005 BMW 645 Fuel Costs

The 4398cc petrol engine is on the larger side, so fuel won't be this car's strong point. Expect around 30 mpg in mixed driving, which works out to roughly £1,958 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).

What does it cost to own a 2005 BMW 645?

Total estimated annual running cost is £3,153 (£263/month), broken down as £1,958 fuel, £790 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 86% pass rate. Keeping on top of servicing will help avoid surprises.

Buying a Used 2005 BMW 645

At 21 years old, the BMW 645 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

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.

Timing Chain / Belt

Watch out

At 21 years old, check whether the timing belt has been replaced (typically due every 5-7 years or 60,000-100,000 miles). A snapped belt can destroy the engine.

Oil Consumption

Medium risk

Larger petrol engines can develop higher oil consumption as they age. Check the oil level and look for blue smoke from the exhaust.

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 104k 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.

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 2005 BMW 645 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
BMW 645(2005)	86%	£1,958	£790	Grp 35-50	£3,153
BMW X5(2005)	77%	£1,958	£790	Grp 35-50	£3,303+£150
Land Rover Range Rover(2006)	80%	£1,958	£790	Grp 35-50	£3,153same
Land Rover Range Rover Sport(2005)	82%	£1,958	£790	Grp 35-50	£3,153same
Volvo XC90(2006)	73%	£1,958	£790	Grp 35-50	£3,303+£150

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 2005 BMW 645

Is the 2005 BMW 645 reliable?

Good reliability. Occasional issues but generally solid. 86% of MOT tests on 2005 BMW 645s ended in a pass, from 1,061 tests (DVSA MOT data for tests in 2024, retests included). That's 4 points above the average of 82% across all models in the same data.

How much does a 2005 BMW 645 cost to run?

Our estimate is £3,153 a year (£263 a month): £1,958 fuel, £790 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 2005 BMW 645?

86% of 1,061 MOT tests on the 2005 BMW 645 ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 71st of 504 models first registered in 2005 (top 15%).

Which year BMW 645 has the best MOT pass rate?

Of the years with at least 100 tests, the 2005 BMW 645 has the highest MOT pass rate at 86% and the 2004 the lowest at 83%. Newer cars usually pass more often simply because they are younger and have done fewer miles.

What is the average mileage for a 2005 BMW 645?

The average mileage recorded at MOT tests on the 2005 BMW 645 is 103,715 miles, which is below the expected 140,600 miles for a 19-year-old car. This suggests lighter use than average, which generally means less wear on major components.