BMW 7 Series 730d Engine ReplacementCompare Prices & Get Quotes
Get free, no-obligation quotes today from trusted UK BMW 7 Series 730d engine specialists. Compare prices on reconditioned, rebuilt and used 3.0-litre diesel engines for E65, F01 and G11 730d models.
Supply & Fit Available
12-Month Warranty
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From £3,500 to £7,000
Used from £1,500 · Reconditioned from £3,200 · Common codes: M57D30, N57D30, B57D30A, B57D30B
From £1,500
Tested, bare/short engine
From £3,200
Rod bearings addressed, tested
From quote
Upgraded bearings, full teardown, revised valvetrain
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3 Simple Steps3 Simple Stepsto Finding the Best BMW 7 Series 730d Replacement Engineto Finding the Best BMW 7 Series 730d Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryBMW 7 Series 730d - Engine History & Specs at a Glance
The BMW 730d has served as the entry-level diesel flagship of the 7 Series range since the E65 generation, offering a compelling blend of refinement, torque and fuel economy. Over four generations - E65, F01, G11 and G12 - the 730d has been powered by three successive 3.0-litre straight-six diesel families: M57, N57 and B57.
Variant HistoryBMW 7 Series 730d - Engine History & Specs at a Glance
The BMW 730d has served as the entry-level diesel flagship of the 7 Series range since the E65 generation, offering a compelling blend of refinement, torque and fuel economy. Over four generations - E65, F01, G11 and G12 - the 730d has been powered by three successive 3.0-litre straight-six diesel families: M57, N57 and B57.
BMW 7 Series 730d
Fuel TypeDiesel
Engine Size3.0L (2,993 cc)
Power Output Range218-286 hp (160-210 kW) across generationsEngine History Timeline
M57D30 3.0-litre inline-six turbodiesel, 218 hp (160 kW) / 500 Nm, launch of E65 730d
M57D30TU2 (facelift) 231 hp (170 kW) / 520 Nm, E65 LCI update
N57D30 245 hp (180 kW) / 540 Nm, F01 7 Series launch
B57D30A 265 hp (195 kW) / 620 Nm, G11 730d launch; N57 phased out
B57D30A (LCI update) 286 hp (210 kW) / 650 Nm, G11/G12 mild-hybrid
Key Specs Snapshot
Fuel TypeDieselEngine Size3.0L (2,993 cc)Power Output Range218-286 hp (160-210 kW) across generationsTorque Range500-650 NmYears Produced2002-presentEvery engine fitted to the BMW 7 Series 730d is covered below, with UK rebuilt pricing and known failure points.
BMW 7 Series 730d Engine Codes - Specifications & Replacement CostBMW 7 Series 730d Engine Codes - Specifications & Replacement Cost
3.0L Straight-Six Diesel (2002-2008)
Power Output218-231 hp (160-170 kW)Torque500-520 NmYears Fitted2002-2008ChassisE65 (standard wheelbase), E66 (long wheelbase)Displacement2,993 ccFuel SystemCommon-rail direct injection
Compatible Trim Levels
- 730d
- 730d SE
- 730d Sport
- 730d M Sport
Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£1,200-£2,500
Reconditioned
Addressed known issues, tested
£2,500-£4,000
Rebuilt
Full teardown, upgraded internals
£3,800-£5,500
Common Failure
The M57 engine is generally robust, but the earlier M57D30 can suffer from injector failure and EGR valve clogging, particularly on higher-mileage examples. The TU2 update improved reliability with revised injectors and turbocharger design.
The BMW 730d has been powered by three generations of 3.0-litre straight-six diesel - M57, N57 and B57 - each with its own reliability profile. While the M57 is broadly regarded as robust, the N57 is well-documented for timing chain issues, and the B57 (particularly early examples) can suffer from EGR cooler problems. Rebuilt engines supplied through EnginesMarket include upgraded timing chain components (N57), refreshed EGR systems (B57) and a minimum 12-month unlimited-mileage warranty.
Why the BMW 7 Series 730d N57D30 Wears Prematurely
Affected Vehicles
BMW 7 Series 730d (N57D30, 2008-2015)
Typical Failure Mileage
80,000-150,000 miles
Root Cause
Timing chain stretch and tensioner wear, particularly on pre-2013 models. The chain is located at the rear of the engine, making inspection and replacement labour-intensive.
Why It Happens
Timing chain stretch and tensioner wear, particularly on pre-2013 models. The chain is located at the rear of the engine, making inspection and replacement labour-intensive.
Dealer (parts + labour)
£3,000-£4,500
Specialist (parts + labour)
£1,900-£2,800
What it involves
Replace timing chain, guides and tensioner
Suitability
Catch it early - before chain skips or breaks
1 - 2 daysDealer (parts + labour)
£7,000-£10,000
Specialist (parts + labour)
£6,000-£8,500 (matches Section 4 rebuilt figure)
What it involves
Supply & fit, new timing chain components, upgraded tensioner, 12-month warranty
Suitability
If chain has already failed and caused internal damage
1 - 2 daysAll prices are indicative UK market ranges based on current UK specialist supplier data.| Repair Tier | Dealer (Parts + Labour) | Specialist (Parts + Labour) | What It Involves | Suitability | Estimated Time |
|---|---|---|---|---|---|
 Timing chain and tensioner replacement Minor | £3,000-£4,500 | £1,900-£2,800 | Replace timing chain, guides and tensioner | Catch it early - before chain skips or breaks | 1 - 2 days |
 Full Replacement - rebuilt/reconditioned engine Best Value | £7,000-£10,000 | £6,000-£8,500 (matches Section 4 rebuilt figure) | Supply & fit, new timing chain components, upgraded tensioner, 12-month warranty | If chain has already failed and caused internal damage | 1 - 2 days |
Vehicle Value Check
Vehicle Value Check
A typical 730d varies significantly by generation. An E65 730d (2002-2008) is worth approximately £1,500-£5,000; an F01 730d (2008-2015) sits at £4,000-£9,000; and a G11/G12 730d (2015-present) holds £15,000-£40,000+ [THIRD-PARTY - Parkers/Auto Trader market observation]. - Vehicle worth under ~£5,000: repair or used engine typically makes more sense than a full rebuilt unit. - Vehicle worth ~£5,000-£8,000: evaluate both; reconditioned is viable if keeping the car 2+ years. - Vehicle worth ~£8,000-£15,000: reconditioned/rebuilt usually justifies the premium via warranty and reliability. - Vehicle worth £15,000+: replacement cost is typically small relative to vehicle value.
Our Recommendation
Our Recommendation
If your 730d has a rattling timing chain on cold start, act immediately - ignoring it will lead to catastrophic failure. A specialist timing chain replacement (£1,900-£2,800) is the most cost-effective solution if caught early. If the chain has already snapped or the engine has jumped timing, a rebuilt engine with upgraded components is the only reliable fix.
Don't Let Engine Failure Write Off Your BMW 7 Series 730d
The 730d's 3.0-litre straight-six diesel is one of BMW's most enduring engines, but timing chain wear (N57), EGR cooler leaks (B57) and DPF clogging can turn expensive quickly. A rebuilt engine through EnginesMarket addresses these issues with upgraded components and comes with a 12-month unlimited-mileage warranty. Compare quotes from UK specialists today and keep your 730d on the road for years to come.
Compare rebuilt N57D30 BMW 7 Series 730d engine prices
12-Month Minimum
UK Specialists Vetted
Best Price GuidanceImportant Information
Important Information
"All prices are indicative UK market ranges based on historical quote data and repair requests from our network of engine specialists. Dealer pricing is estimated based on published main dealer labour rates and genuine OEM parts pricing. Specialist pricing reflects actual quote data from EnginesMarket's UK network. Actual costs vary depending on damage severity, vehicle condition, variant, and workshop location within the UK. Use our free comparison tool to get tailored quotes for your specific BMW 7 Series 730d. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier."
BMW 7 Series 730d Engine ReplacementFrequently Asked Questions
Question 1How much does a BMW 730d engine replacement cost in the UK-
A replacement 3.0-litre diesel engine for a BMW 730d costs £1,200-£3,500 for a used unit (M57/N57), £3,200-£5,800 for a reconditioned unit, and £3,800-£8,500 for a fully rebuilt engine depending on generation. Supply and fit adds approximately £780-£1,040 in specialist labour (12-16 hours at £65/hr).
- Used engines: lowest cost, variable condition and mileage
- Reconditioned engines: restored to OEM tolerances, balanced cost and reliability
- Rebuilt engines: fully stripped and rebuilt with new components, best warranty
Question 2What are the signs of N57 timing chain failure in a 730d-
The most common sign is a rattling noise from the engine on cold start, particularly from the rear of the engine bay. Other symptoms include:
- Rough idle and poor performance
- Check engine light with timing-related fault codes
- Metallic debris in the oil
- Catastrophic failure if ignored - chain snap destroys the engine
Question 3Is it worth replacing the engine in a BMW 730d-
It depends on the generation and condition. An E65 730d is worth £1,500-£5,000 - a rebuilt engine (£3,800-£5,500) may exceed the car's value. An F01 730d (£4,000-£9,000) makes replacement viable if the car is otherwise in good condition. A G11/G12 730d (£15,000-£40,000+) easily justifies a replacement engine.
- Check MOT history and bodywork before committing
- Low-mileage, well-maintained examples justify the investment
- LWB (730Ld) and xDrive variants hold value better
Question 4How long does a BMW 730d engine replacement take-
Most BMW 730d engine replacements take 2-4 days for supply and fit at a specialist garage. The M57/N57/B57 straight-six is a relatively straightforward engine to remove and refit on the 7 Series chassis. Allow additional time if the car requires:
- Timing chain components (N57)
- EGR cooler replacement (B57)
- DPF cleaning or replacement
- Collection and delivery (1-2 days depending on location)
Question 5Do BMW 730d replacement engines come with a warranty-
Yes - all rebuilt and reconditioned BMW 730d engines supplied through EnginesMarket include a minimum 12-month unlimited-mileage warranty. Used engines typically have a 3-6 month warranty depending on the supplier. Extended warranty options are available with some specialists.
- Rebuilt engines: 12-24 month warranty, unlimited mileage
- Reconditioned engines: 12-month warranty, unlimited mileage
- Used engines: 3-6 month warranty, mileage-dependent
Question 6What's the difference between the 730d, 740d and 750d engines-
The 730d uses a single-turbo 3.0-litre straight-six diesel (M57/N57/B57) producing 218-286 hp. The 740d uses a twin-turbo version of the same 3.0-litre engine producing 313-340 hp. The 750d (G11/G12) uses a quad-turbo B57S producing 400 hp. Engines are not interchangeable between variants without significant ECU and hardware changes.
- 730d: single turbo, 218-286 hp, most economical
- 740d: twin turbo, 313-340 hp, best all-rounder
- 750d: quad turbo, 400 hp, ultra-premium performance diesel
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