How much does a BMW 7 Series 740i engine replacement cost in the UK?

A reconditioned 740i engine typically costs £2,500–£7,000 supply only depending on generation, with older M60/M62 units lower and the B58 higher. Fitting adds £1,000–£1,800. Use our calculator for a figure specific to your 740i.

Is the BMW 740i engine reliable?

It depends which generation your 740i is. The E38 M62 is the most reliable V8 with timing chain guides as its main weakness. The G11/G70 B58 is the most refined and reliable overall. The N54 and N62 are the most maintenance‑sensitive. Check the Era Map above for your specific car.

What are the common problems with the BMW 740i engine?

E32 M60: Nikasil liner degradation. E38 M62: timing chain guide failure. E65 N62: valve stem seal failure. F01 N54: HPFP failure. F01 N55: water pump. G11/G70 B58: coolant system and PCV valve. Each generation has its own character and watchpoints.

Is it worth replacing a 740i engine, or should I scrap the car?

Depends on vehicle value and generation. An E38 740i is a £3,000–£10,000 vehicle - a £3,000–£4,000 recon is 30–133% of the car's value. For lower‑value examples, replacement may exceed our 70% BMW scrap threshold. A G11/G70 740i is a £20,000–£50,000 vehicle - a £6,000–£7,000 recon is 12–35% of the car's value, making replacement viable. Evaluate carefully based on your car's generation and condition.

How do I find my BMW 740i engine code?

Listed on the VIN plate and vehicle documentation. The 740i covers M60 (E32), M62/M62TU (E38), N62 (E65), N54/N55 (F01), and B58 (G11/G70). Tell us your registration date and we'll confirm which one you have for free.

Can I prevent the common failures on a 740i?

On M62: timing chain guides replacement at 100,000 miles is recommended. On N62: regular oil changes with BMW LL‑01 spec oil can extend valve stem seal life. On N54: use high‑quality fuel and have HPFP inspected. On B58: regular coolant system checks and BMW‑spec oil changes. At the first sign of rattle, blue smoke or rough running, book an inspection immediately.

BMW 7 Series 740i1992–presentM60 / M62 / N62 / N54 / N55 / B58

BMW 7 Series 740i Engine Replacement — Compare Prices & Get Quotes

The 740i badge spans six generations of BMW's flagship saloon - from the original M60 V8 through to the modern B58 straight-six with 48V mild-hybrid technology. Get quotes from trusted UK specialists today.

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7 Series 740i Engines - from £800 to £8,500M60 / M62 / N62 / N54 / N55 / B58

7 Series 740i Engines - from £800 to £8,500· M60 / M62 / N62 / N54 / N55 / B58

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The 740i THROUGH TIME - Era Map

Four generations. Four eras. One guide to reliability, costs and what really matters.

GenerationYearsEngine CodeReliabilityRecon CostEra Note

Why use this era map?

This table is the single source every other section on this page matches - Sections 2, 4 and 6 reference it rather than restating conflicting figures.

Real UK Cost Data

Verified Reliability

Expert Insights

Updated for 2025

BMW 7 Series 740i Engine Replacement Costs

Supply Only£2,500–£7,000

Fitted (Indie)£3,500–£8,500

Warranty12–24 months

Best ForMost owners - best cost/warranty balance

Engine TypeSupply OnlyFitted (Indie)WarrantyBest For

Used Engine£800–£4,500£1,500–£6,0001–6 monthsBudget priority; older generations

Reconditioned Engine£2,500–£7,000£3,500–£8,50012–24 monthsMost owners - best cost/warranty balance

Rebuilt Engine£3,500–£8,500£4,500–£10,00012–24 monthsLong-term ownership; 3+ year horizon

Main Dealer New£6,000–£12,000 (where available)£7,200–£13,80024–36 monthsInsurance jobs, warranty claims

Figures above reflect the range across all generations; specific costs vary by era - see the Era Map above.

Labour estimate: Fitting a 740i engine typically takes 12–18 hours at £65–£95/hr (independent) or £110–£160/hr (London/SE dealer).

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Common Problems With BMW 320d Engines

1. Nikasil Cylinder Liner Degradation (M60, E32 1992–1994)

Symptoms: Misfires, rough idle, loss of compression, increased oil consumption, engine warning light.

Typical mileage: 60,000–100,000 miles

Repair cost: £3,000–£6,000 (engine rebuild or replacement)

Replacement cost: £3,000–£6,000 (full engine replacement)

🟠 Check - book inspection urgently if misfires occur

Our recommendation:

The M60 V8's Nikasil cylinder liners can degrade when exposed to high‑sulphur fuel. If you experience misfires or rough running, have a compression test performed immediately. Many early M60 engines have been replaced; if yours hasn't, budget for a bottom‑end rebuild or replacement.

1. Nikasil Cylinder Liner Degradation (M60, E32 1992–1994)

Symptoms: Misfires, rough idle, loss of compression, increased oil consumption, engine warning light.

Typical mileage: 60,000–100,000 miles

Repair cost: £3,000–£6,000 (engine rebuild or replacement)

Replacement cost: £3,000–£6,000 (full engine replacement)

🟠 Check - book inspection urgently if misfires occur

Our recommendation:

2. Timing Chain Guide Failure (M62 / M62TU, E38 1995–2001)

Symptoms: Rattling noise on cold start, metallic ticking, engine warning light, loss of power.

Typical mileage: 80,000–150,000 miles

Repair cost: £1,500–£3,500 (chain guides and tensioner replacement)

Replacement cost: N/A - repair only (if caught before chain jumps)

🔴 Immediate - if you hear rattle, book an inspection today

Our recommendation:

The M62's timing chain guides are the defining weakness - they become brittle and can shatter, causing the chain to jump. If you hear a rattling noise on cold start, have the guides inspected immediately. Regular oil changes with the correct spec are essential. Many owners replace the guides preventatively around 100,000 miles.

3. Valve Stem Seal Failure (N62, E65 2002–2008)

Symptoms: Blue smoke on startup, excessive oil consumption (1L per 1,000 miles+), fouled spark plugs.

Typical mileage: 60,000–100,000 miles

Repair cost: £2,500–£5,000 (valve stem seal replacement)

Replacement cost: N/A - repair only (if caught before catalytic converter damage)

🟡 Monitor - book inspection soon

Our recommendation:

The N62 V8 is notorious for valve stem seal failure - the seals harden and allow oil to leak into the combustion chamber. If you see blue smoke on startup or excessive oil consumption, have the valve stem seals inspected. Replacing them is labour‑intensive but far cheaper than a full engine replacement. Some owners use oil additives to temporarily reduce consumption, but this is not a permanent fix.

4. High‑Pressure Fuel Pump Failure (N54, F01 2008–2012)

Symptoms: Long crank on start, rough idle, loss of power, engine stalling, engine warning light.

Typical mileage: 40,000–80,000 miles

Repair cost: £600–£1,200 (HPFP replacement)

Replacement cost: N/A - repair only

🟠 Check - book inspection urgently if symptoms appear

Our recommendation:

The N54's HPFP is its defining weakness - a well‑documented issue that plagued early cars. If you experience long cranking or loss of power, have the fuel pressure tested. BMW issued recalls for this, but many cars are now out of warranty. Replacing the HPFP with a revised unit is the permanent fix.

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740i - Repair, Buy, or Replace?

Every 320d has a story. Make the right call with clear data, real-world costs, and honest guidance from UK specialists.

740i - Repair, Buy, or Replace?

Every 320d has a story. Make the right call with clear data, real-world costs, and honest guidance from UK specialists.

Can It Be Repaired?

ProblemRepairable?Typical CostWhen It Makes SenseNikasil liner degradation (M60)⚠️ Sometimes£3,000–£6,000Often requires full rebuild; assess overall engine healthTiming chain guides (M62)✅ Yes£1,500–£3,500Catch it early - before chain jumpsValve stem seals (N62)✅ Yes£2,500–£5,000Labour‑intensive but cheaper than replacementHPFP failure (N54)✅ Yes£600–£1,200Straightforward - replace with revised unitSevere engine damage❌ Usually NoEngine replacementLittle left to salvage - replacement is the only option

Buying This 740i? Check These First

Buy If

E32 M60: Nikasil liners replaced or compression test passed
E38 M62: timing chain guides replaced or inspected
E65 N62: valve stem seals replaced (or budget for it)
F01 N54: HPFP replaced with revised unit
Full service history with BMW-spec oil for the correct era

Avoid If

E32: misfires or rough running - Nikasil may be degrading - walk away
E38: cold‑start rattle - timing chain guides may be failing
E65: blue smoke on startup - valve stem seals are failing
F01 N54: long cranking - HPFP may be failing

Closing Verdict

The 740i badge is a journey through BMW flagship engineering - from the first V8s to the modern B58 straight‑six. The E38 M62 is the most reliable V8; the G11/G70 B58 is the most refined and reliable overall. The N54 and N62 are the most maintenance‑sensitive. Buy on generation‑specific history - and never ignore a cold‑start rattle or blue smoke.

Don't guess.Get the right engine at the right price.

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Buying Checklist

Before you buy a used BMW 7 Series 740i (or before you commit to an engine replacement), check these:

Cold Start

Listen for rattling (M62 timing chain guides) or blue smoke (N62 valve stem seals)

Misfires (E32)

Check for rough running; Nikasil liner degradation indicator

Cranking Time (N54)

Check for long cranking; HPFP failure indicator

Service History

including which generation (E32/E38/E65/F01/G11/G70) and confirmed maintenance

Oil Consumption

Does it use more than 1L per 1,000 miles? (N62 valve stem seals)

Coolant Level (B58)

Check for unexplained loss; water pump may be failing

Engine Warning Light

Have codes been read? Any unresolved issues?

MOT History

Check for emissions‑related failures

Buy smart. Drive with confidence.

A few checks today can save thousands tomorrow. Use this checklist to avoid the most common 320d pitfalls.

Buy smart. Drive with confidence.

A few checks today can save thousands tomorrow. Use this checklist to avoid the most common 320d pitfalls.

BMW 320d Engine Codes

This table's rows match Section 1B's Era Map exactly.

M60B40 (4.0 V8)

Years1992–1994

Power286 hp (210 kW) @ 5,800 rpm; 400 Nm @ 4,500 rpm

2025 Enquiries- (pattern data)

Avg. Recon Cost£1,500–£3,000 [PLACEHOLDER]

Engine CodeYearsPower2025 EnquiriesAvg. Recon Cost

M60B40 (4.0 V8)1992–1994286 hp (210 kW) @ 5,800 rpm; 400 Nm @ 4,500 rpm- (pattern data)£1,500–£3,000 [PLACEHOLDER]

M62B44 (4.4 V8)1995–1998282–286 hp @ 5,700 rpm; 420 Nm @ 3,900 rpm- (pattern data)£1,800–£3,500 [PLACEHOLDER]

M62TUB44 (4.4 V8, VANOS)1998–2001282–286 hp @ 5,700 rpm; 420 Nm @ 3,900 rpm- (pattern data)£2,000–£3,800 [PLACEHOLDER]

N62B40 (4.0 V8)2002–2008306 hp (225 kW) @ 6,300 rpm; 390 Nm @ 3,500 rpm- (pattern data)£2,500–£4,500 [PLACEHOLDER]

N54B30A (3.0 twin-turbo I6)2008–2012326 hp (240 kW) @ 5,800 rpm; 450 Nm @ 1,500–4,500 rpm- (pattern data)£3,500–£5,500 [PLACEHOLDER]

N55B30A (3.0 single-turbo I6)2012–2015320 hp (235 kW) @ 5,800 rpm; 450 Nm @ 1,300–4,500 rpm- (pattern data)£4,000–£6,000 [PLACEHOLDER]

B58B30M0 (3.0 turbo I6)2015–2019326 hp (240 kW); 450 Nm- (pattern data)£5,000–£7,500 [PLACEHOLDER]

B58B30C (3.0 turbo I6)2019–2022340 hp (250 kW); 450 Nm- (pattern data)£5,500–£8,000 [PLACEHOLDER]

B58B30M2 (3.0 turbo I6, 48V MHEV)2022–present375 hp (280 kW) @ 5,200 rpm; 520 Nm @ 1,850 rpm- (pattern data)£6,000–£8,500 [PLACEHOLDER]

Technical Specs

B58B30M2 3.0 straight-six, G70

Displacement2,998 cc

Cylinders6-cylinder inline

Compression Ratio11.0:1

Fuel SystemDirect injection

TurbochargerSingle-turbo (twin-scroll) + 48V MHEV starter-generator

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Market Intelligence

Most Common Failure

E38: timing chain guides; E65: valve stem seals; F01 N54: HPFP; B58: coolant system

[PATTERN DATA]

Average Enquiry Mileage

75,000

miles

[PATTERN DATA]

Average Replacement Cost

£3,000

–£6,000 reconditioned, supply only

[PLACEHOLDER - confirm vs cost sheet]

Most Requested Engine Code

N62B40 / M62B44

40%

of 740i enquiries

[PATTERN DATA]

Peak Enquiry Season

Autumn/Winter

cold starts expose chain and seal issues

[PATTERN DATA]

Regional Demand

South East18%

London16%

North West12%

PATTERN DATA

Regional Demand Breakdown

18%South East

16%London

12%North West

BMW 320d - Frequently Asked Questions

All prices are indicative UK market ranges based on historical quote data from our network of engine specialists. Actual costs vary by variant, engine code, damage severity and workshop location. Use our free comparison tool to get tailored quotes. Every engine supplied through EnginesMarket carries a minimum 12‑month unlimited‑mileage warranty - always confirm terms with your chosen supplier.

Find the best BMW 7 Series 740i engine replacement UK drivers rely on. Compare prices from trusted specialists on EnginesMarket today and get back on the road with confidence - from £800 for a used unit to £8,500 for a fully rebuilt flagship engine.

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100% Free

No hidden fees

No Obligation

Get quotes with zero pressure

UK Specialists

20+ vetted experts

12-Month Warranty

As standard

Nationwide Delivery

Supply & fit available