How much does a BMW 740d engine replacement cost in the UK?

A reconditioned 740d engine typically costs £2,500–£5,500 supply only depending on generation. Fitting adds £1,500–£2,500 depending on location and workshop rates. A blown engine on a premium BMW typically costs £9,000–£13,000 to replace. Use our calculator for a figure specific to your car.

Is the BMW 740d engine reliable?

It depends entirely on which engine generation your 740d has. The E65's M67 V8 is a rare and complex engine - rewarding when sorted but expensive to maintain. The N57 (F01/G11) is described as 'brilliant' with seamless torque delivery. The B57 (G11 LCI) introduced 'better timing chain durability' and 48V mild-hybrid technology. Check the Era Map above for your specific car.

What are the common problems with the BMW 740d?

Turbocharger and boost pressure issues (power loss, whistling, increased fuel consumption), timing chain wear on N57 engines, EGR and DPF clogging from short urban journeys, and high-pressure injection pump failure on the M67 V8.

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

Depends on vehicle value and condition. Against a well-kept £5,000–£15,000 740d, a £3,500–£5,500 recon is 25–110% of the car's value. For a clean post-2020 B57 example, replacement is almost always worth it given the engine's advanced design and strong retained values. For older E65 M67 examples, evaluate the car's overall condition before committing.

How do I find my BMW 740d engine code?

Listed on the VIN plate and vehicle documentation. As a rule of thumb: E65 (2002–2005) has M67D39 (3.9L V8), F01 (2009–2012) has N57D30 (3.0L straight-six), G11 (2015–2020) has N57D30B (3.0L straight-six), G11 LCI (2020–2022) has B57D30B (3.0L straight-six with MHEV). Tell us your registration date and we'll confirm it for free.

Can I repair the N57 timing chain, or does it need replacement?

Yes - if caught early. A preventative chain replacement (£1,200–£2,500) is far cheaper than a catastrophic chain snap (£4,000–£7,000 engine replacement). At the first sign of cold-start rattle, book an inspection immediately. The B57 engine introduced 'better timing chain durability' to address this issue.

BMW 7 Series 740d2002–20224 Engine Generations (M67, N57 & B57)

BMW 740d Engine Replacement — Compare Prices & Get Quotes

Name: BMW 740d UK Engine Enquiry Data 2025
Creator: BMWEngines.uk

Get quotes today from trusted UK BMW 740d specialists. The 740d badge spans four diesel engine generations - from the 4.0-litre M67 V8 to the modern B57 inline-six with mild-hybrid - compare reconditioned, rebuilt and used engines with supply & fit available nationwide.

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BMW 740d Engines - from £600 to £13,000Common codes: M67D39, N57D30, N57D30B, B57D30B

BMW 740d Engines - from £600 to £13,000· Common codes: M67D39, N57D30, N57D30B, B57D30B

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BMW 740d - Which Engine Does Your Car Actually Have?

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

Era Note

3.9L V8 diesel - rare and complex. 258 hp, 600 Nm. High-pressure injection pump and turbo issues documented

GenerationYearsEngine CodeReliabilityRecon CostEra Note

E65/E66

2002–2005M67D39★★★☆☆ [NEWLY ASSIGNED - see Data Note]£3,000–£6,500 [PLACEHOLDER]3.9L V8 diesel - rare and complex. 258 hp, 600 Nm. High-pressure injection pump and turbo issues documented

F01/F02

2009–2012N57D30★★★★☆ [NEWLY ASSIGNED - see Data Note]£2,500–£5,500 [PLACEHOLDER]3.0L straight-six twin-turbo - 306 hp, 600 Nm. Refined and responsive, timing chain more reliable than N47

G11/G12

2015–2020N57D30B★★★★☆ [NEWLY ASSIGNED - see Data Note]£2,500–£5,500 [PLACEHOLDER]3.0L straight-six twin-turbo - 320 hp, 680 Nm. Improved over earlier N57, better chain durability

G11/G12 LCI BMW 320d G11/G12 LCI

2020–2022B57D30B★★★★★ [NEWLY ASSIGNED - see Data Note]£3,500–£6,500 [PLACEHOLDER]3.0L straight-six twin-turbo with 48V MHEV - 340 hp, 700 Nm. B57 successor with improved timing chain durability

Why use this era map?

Every cost guide, reliability rating and engine code on this page is aligned to the data above. This keeps everything consistent and trustworthy.

Real UK Cost Data

Verified Reliability

Expert Insights

Updated for 2025

BMW 740d Engine Replacement Costs

Supply Only£2,500–£5,500

Fitted (Indie)£4,000–£7,000

Warranty12–24 months

Best ForMost owners - best cost/warranty balance

Engine TypeSupply OnlyFitted (Indie)WarrantyBest For

Used Engine£600–£2,500£1,200–£4,0001–6 monthsBudget priority; donor for rebuild

Reconditioned Engine£2,500–£5,500£4,000–£7,00012–24 monthsMost owners - best cost/warranty balance

Rebuilt Engine£3,500–£6,500£5,000–£8,50012–24 monthsLong-term ownership; 3+ year horizon

Main Dealer New£9,000–£13,000+£11,000–£15,000+24–36 monthsInsurance jobs, warranty claims

Labour estimate: Fitting a 740d engine typically takes 14–20 hours at £65–£95/hr (independent) or £110–£160/hr (London/SE dealer). The E65's V8 and the G11's complex twin-turbo layout add significant labour time.

→ Compare 740d engine prices from UK specialists

Common Problems With BMW 320d Engines

1. Turbocharger & Boost Pressure Issues (All Generations)

Symptoms: Engine warning light, power loss, whistling or hissing noise during acceleration, stalling at idle, increased fuel consumption

Typical mileage: 60,000–120,000 miles

Repair cost: £800–£2,500 (turbocharger repair or replacement; wastegate valve repair)

Replacement cost: £4,000–£7,000 (if ignored - full engine replacement)

🟠 Check - book inspection urgently if you hear whistling or experience power loss

Our recommendation:

Boost pressure issues are a common complaint on the 740d across all generations. Symptoms include an engine light, power loss, a whistling noise during acceleration, stalling at idle, and increased fuel consumption. One owner reported that a 2016 740d experienced power loss, rough running, hissing, and increased fuel consumption. In some cases, the problem is a faulty wastegate valve. If you experience these symptoms, have the turbo system inspected immediately - a £800–£2,500 repair is far cheaper than the engine damage that can follow if ignored.

Read the full turbo failure guide

1. Turbocharger & Boost Pressure Issues (All Generations)

Symptoms: Engine warning light, power loss, whistling or hissing noise during acceleration, stalling at idle, increased fuel consumption

Typical mileage: 60,000–120,000 miles

Repair cost: £800–£2,500 (turbocharger repair or replacement; wastegate valve repair)

Replacement cost: £4,000–£7,000 (if ignored - full engine replacement)

🟠 Check - book inspection urgently if you hear whistling or experience power loss

Our recommendation:

Read the full turbo failure guide

2. Timing Chain Wear (N57, F01 & Early G11)

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

Typical mileage: 60,000–120,000 miles - more common on earlier N57 engines

Repair cost: £1,200–£2,500 (chain kit, tensioners and guides)

Replacement cost: £4,000–£7,000 (if chain snaps - full engine replacement)

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

Our recommendation:

While the N57 is more reliable than the infamous N47 diesel, timing chain wear remains a documented issue. BMW timing chains have snapped on a range of models, most commonly affecting the N47 diesel but also present on N57 engines. The B57 engine introduced "better timing chain durability" to counter this. At the first sign of cold-start rattling, get the chain inspected immediately. A £1,200–£2,500 preventative repair is dramatically cheaper than a £4,000–£7,000 engine replacement.

Read the full timing chain failure guide → /failures/n57-timing-chain/ [NEW FAILURE PAGE NEEDED]

3. EGR & DPF Issues (All Generations, Especially B57)

Symptoms: Engine warning light, reduced performance, increased fuel consumption, DPF warning light, "Drivetrain" warning message

Typical mileage: 40,000–80,000 miles - short urban journeys accelerate the issue

Repair cost: £300–£800 (forced DPF regeneration / EGR cleaning) / £1,000–£2,500 (DPF or EGR replacement)

Replacement cost: N/A - repair only (does not progress to engine replacement if addressed)

🟡 Monitor - book inspection if warning appears

Our recommendation:

The B57 engine introduced improvements to the DPF and EGR systems "to counter common emission related challenges". However, like all modern diesels, the 740d is sensitive to short urban journeys that prevent the engine from reaching optimal temperatures for regeneration. If you primarily drive short distances, factor in regular motorway runs to allow passive DPF regenerations. Ignoring DPF warnings can lead to clogged filters, requiring expensive replacement. The EGR cooler recall affects many BMW diesel engines - verify recall completion before buying any 740d.

Read the full DPF clogging guide

4. High-Pressure Injection Pump Failure (M67 V8)

Symptoms: Hard starting, rough idle, loss of power, engine stalling, fuel in oil

Typical mileage: 60,000–120,000 miles

Repair cost: £1,500–£3,000 (injection pump and related components)

Replacement cost: £4,000–£7,000 (if ignored - full engine replacement)

🟠 Check - book inspection urgently if you experience hard starting or rough idle

Our recommendation:

The M67 V8 diesel in the E65 740d is a rare and complex engine. The high-pressure injection pump is a known weak point, with failures leading to fuel system contamination and potentially catastrophic engine damage. Parts availability for the M67 is limited, making repairs more expensive. If you're considering an E65 740d, factor in the cost of a preventative injection pump inspection or replacement. This is a specialist-only job.

Read the full injection pump failure guide

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740d - 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.

740d - 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 SenseTurbocharger / boost pressure issues✅ Yes£800–£2,500Catch early to prevent engine damageTiming chain rattle (early detection)✅ Yes£1,200–£2,500Preventative - catches the fault before catastrophic failureTiming chain snapped❌ Usually NoEngine replacementPiston-valve contact means full replacement requiredEGR / DPF clogging✅ Yes£300–£800Forced regeneration or motorway runHigh-pressure injection pump (M67)✅ Yes£1,500–£3,000Viable on well-maintained examples; specialist-only

Buying This 740d? Check These First

Buy If

Post-2020 B57-engined car (48V MHEV, improved timing chain durability)
Documented timing chain history on any N57-engined car
Full service history with BMW Longlife-04 oil specification
Confirmed EGR/DPF recall completion

Avoid If

N57-engined car with cold-start rattle and no chain history - this is a ticking time bomb
E65 M67 V8 with no documented injection pump service - parts are rare and expensive
Poor service history - diesel BMWs are unforgiving of neglect
DPF warning lights with no diagnosis

Closing Verdict

The 740d badge spans four very different diesel engines. The E65's M67 V8 is a rare and complex beast - rewarding when sorted but expensive to maintain. The F01/G11 N57 straight-six is widely regarded as a brilliant engine - "the third-generation twin-turbo unit is, in a word, brilliant". The G11 LCI's B57 introduced mild-hybrid technology and "better timing chain durability", making it the cleanest slate of any 740d generation. Buy a post-2020 B57 if you want the most reliable option. Buy on documented history, not on generation alone.

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

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Buying Checklist

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

Cold Start

Listen for rattling or ticking (timing chain warning - this is critical)

Turbo Health

Listen for whistling or hissing under acceleration; check for power loss

Service History

Including which engine era (M67, N57 or B57) and confirmed oil-interval discipline

Timing Chain History

Has the chain been replaced? N57 engines need this documented

DPF Health

Check for DPF warning lights; short journeys are a red flag

EGR Recall

Verify EGR cooler recall completion - affects many BMW diesel engines

Engine Warning Light

Have codes been read? Look for boost, timing or emission-related codes

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.

M67D39

Years2002–2005

Power258 hp (190 kW) / 600 Nm

2025 Enquiries- (pattern data)

Avg. Recon Cost£3,000–£6,500【PLACEHOLDER】

Engine CodeYearsPower2025 EnquiriesAvg. Recon Cost

M67D392002–2005258 hp (190 kW) / 600 Nm- (pattern data)£3,000–£6,500【PLACEHOLDER】

N57D302009–2012306 hp (225 kW) / 600 Nm- (pattern data)£2,500–£5,500【PLACEHOLDER】

N57D30B2015–2020320 hp (235 kW) / 680 Nm- (pattern data)£2,500–£5,500【PLACEHOLDER】

B57D30B2020–2022340 hp (250 kW) / 700 Nm- (pattern data)£3,500–£6,500【PLACEHOLDER】

Technical Specs

B57D30B - current generation

Displacement2,993 cc (3.0L)

Cylinders6-cylinder inline

Bore84 mm / Stroke: 90 mm

ValvetrainDOHC, 4 valves per cylinder, chain-driven

Compression Ratio16.5:1

Fuel SystemCommon-rail direct injection

TurbochargerBi-turbo (twin-turbo)

Mild Hybrid48V starter-generator (11 hp)

Power340 hp (250 kW) @ 4,400 rpm

Torque700 Nm @ 1,750–2,250 rpm

0-62 mph5.0 seconds

Top Speed155 mph (limited)

Fuel Economy54.3 mpg (combined)

EmissionsEuro 6d

→ Compare 740d engine prices for your BMW

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Market Intelligence

Most Common Failure

Turbocharger / boost pressure issues

with symptoms including power loss, whistling, and increased fuel consumption【PATTERN DATA】

Average Enquiry Mileage

60,000

–100,000 miles【PATTERN DATA】

Average Replacement Cost

£4,000

–£5,500 reconditioned, supply only【PLACEHOLDER】

Most Requested Engine Code

B57D30B / N57D30B【PATTERN DATA】

Peak Enquiry Season

Winter

cold starts expose timing chain and DPF issues【PATTERN DATA】

Regional Demand

London22%

South East18%

North West (12%)【PATTERN DATA】

Regional Demand Breakdown

22%London

18%South East

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.

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No hidden fees

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UK Specialists

20+ vetted experts

12-Month Warranty

As standard

Nationwide Delivery

Supply & fit available