BMW 840 (1998)

Estimated running costs and MOT pass rates from 417 MOT tests in 2024.

Annual Cost

£2,738

£228/month

MOT Pass Rate

87%

Good

Road Tax

£375

Estimated/year

Est. Insurance

Grp 35-50

4398cc Petrol

Solid Option

87% pass rate, £2,738/year to run. 5 points above average.

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Petrol4398cc28 years old417 tests99k miles avg

Annual Running Costs

Fuel (Petrol, 4398cc)

~30 mpg

£1,958

Road Tax

Pre-2001 engine size rate

£375

MOT Test

£55

Predicted Repairs

£350

Total per year£2,738

Per month£228/mo

Per week£53/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

87% 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.

87% of MOT tests on BMW 840s from 1998 ended in a pass in 2024, when they were about 26 years old. That's based on 417 tests across the UK, retests included. The average mileage recorded at those tests was 98,779 miles.

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How Does It Compare?

Rank among 1998 models41st of 325(top 13%)

Rank among BMW models1008th of 1,548(bottom half)

vs average of all models+5%(82% avg)

vs 1998 models average+12%(75% avg)

vs BMW average-1%(88% avg)

Mileage Analysis

98,779

Average miles

192,400

Expected for age

The average 1998 BMW 840 had 98,779 miles on the clock at its 2024 MOT, which is below the expected 192,400 miles for a 26-year-old car. This suggests lighter use than average, which generally means less wear on major components.

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Best Year to Buy?

Of the years with at least 100 tests, the 1997 model has the highest MOT pass rate at 89%, while the 1994 model has the lowest at 74%. The 1998 scores 87%. Newer cars usually pass more often simply because they are younger, so compare years of a similar age.

BMW 840 by Year

Year	Pass Rate	Tests	Avg Mileage
2019	100%	52	42,498 mi
1999	89%	309	100,587 mi
1998	87%	417	98,779 mi
1997	89%	567	114,610 mi
1996	82%	266	110,739 mi
1995	79%	384	120,572 mi
1994	74%	182	110,577 mi

Similar Cars to Consider

Jaguar XK8

1997 · 3995cc Petrol

£2,738/year

81%

-6%

Jaguar XJ

1998 · 3980cc Petrol

£2,888/year

77%

-10%

Land Rover Range Rover

1999 · 3950cc Petrol

£2,888/year

79%

-8%

TVR Chimaera

1998 · 3948cc Petrol

£2,588/year

92%

+5%

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About the 1998 BMW 840

The 1998 BMW 840 is a premium performance car. Our records list a 4398cc petrol engine, though engines vary between versions. 417 MOT tests were recorded on this model in 2024, making it a less common model in the UK market. It ranks in the top 13% of all 1998 models for MOT pass rate.

With an average of 98,779 miles recorded at its 2024 MOT tests, BMW 840 owners tend to use this car less than the typical driver.

1998 BMW 840 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 1998 BMW 840?

Total estimated annual running cost is £2,738 (£228/month), broken down as £1,958 fuel, £375 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 87% pass rate. Keeping on top of servicing will help avoid surprises.

BMW 840 Reliability Trend

Newer BMW 840s pass their MOT more often than older ones, by 10 percentage points on average, which is mostly down to age and wear.

Buying a Used 1998 BMW 840

At 28 years old, the BMW 840 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. If you're flexible on year, the 1997 model has the highest pass rate at 89%.

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 28 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

Medium risk

With an average of 99k 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 1998 BMW 840 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 840(1998)	87%	£1,958	£375	Grp 35-50	£2,738
Jaguar XK8(1997)	81%	£1,958	£375	Grp 35-50	£2,738same
Jaguar XJ(1998)	77%	£1,958	£375	Grp 35-50	£2,888+£150
Land Rover Range Rover(1999)	79%	£1,958	£375	Grp 35-50	£2,888+£150
TVR Chimaera(1998)	92%	£1,958	£375	Grp 35-50	£2,588-£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 1998 BMW 840

Is the 1998 BMW 840 reliable?

Good reliability. Occasional issues but generally solid. 87% of MOT tests on 1998 BMW 840s ended in a pass, from 417 tests (DVSA MOT data for tests in 2024, retests included). That's 5 points above the average of 82% across all models in the same data.

How much does a 1998 BMW 840 cost to run?

Our estimate is £2,738 a year (£228 a month): £1,958 fuel, £375 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 1998 BMW 840?

87% of 417 MOT tests on the 1998 BMW 840 ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 41st of 325 models first registered in 1998 (top 13%).

Which year BMW 840 has the best MOT pass rate?

Of the years with at least 100 tests, the 1997 BMW 840 has the highest MOT pass rate at 89% and the 1994 the lowest at 74%. Newer cars usually pass more often simply because they are younger and have done fewer miles.

What is the average mileage for a 1998 BMW 840?

The average mileage recorded at MOT tests on the 1998 BMW 840 is 98,779 miles, which is below the expected 192,400 miles for a 26-year-old car. This suggests lighter use than average, which generally means less wear on major components.