Engines Market

BMW 730d SPECIALISTS

BMW 7 Series 730d Engine Replacement Compare 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.

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BMW 7 Series 730d Engine
from£3,500 to £7,000
  • Usedfrom £1,500
  • Reconditionedfrom £3,200
  • Common codesM57D30, N57D30, B57D30A
BMW 7-series 730d Used Engine — M57D30 / M57D30TU2BMW 7-seriesUsed Engine — M57D30 / M57D30TU2BMW 7-series 730d Reconditioned Engine — M57D30 / M57D30TU2BMW 7-seriesReconditioned Engine — M57D30 / M57D30TU2BMW 7-series 730d Rebuilt Engine — M57D30 / M57D30TU2BMW 7-seriesRebuilt Engine — M57D30 / M57D30TU2

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How it works

3 Simple Steps to Finding the Right Replacement Engine

Clear information first, then the right engine and specialist for your exact vehicle.

Variant History

BMW 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
  1. 2002

    M57D30, 3.0-litre inline-six turbodiesel, 218 hp (160 kW) / 500 Nm, launch of E65 730d

  2. 2005

    M57D30TU2 (facelift), 231 hp (170 kW) / 520 Nm, E65 LCI update

  3. 2008

    N57D30, 245 hp (180 kW) / 540 Nm, F01 7 Series launch

  4. 2015

    B57D30A, 265 hp (195 kW) / 620 Nm, G11 730d launch; N57 phased out

  5. 2020

    B57D30A (LCI update), 286 hp (210 kW) / 650 Nm, G11/G12 mild-hybrid

Every engine fitted to the BMW 7 Series 730d is covered below, with UK rebuilt pricing and known failure points.

Compatible Engines

BMW 7 Series 730d Engine Codes Specifications & Replacement Cost

Find your exact engine code, specs and UK replacement cost guide.

M57D30 / M57D30TU2 — 3.0L Straight-Six Diesel (2002-2008) engine

M57D30 / M57D30TU2 — 3.0L Straight-Six Diesel (2002-2008)

Power Output
218-231 hp (160-170 kW)
Torque
500-520 Nm
Years Fitted
2002-2008
Chassis
E65 (standard wheelbase), E66 (long wheelbase)
Displacement
2,993 cc
Fuel System
Common-rail direct injection

Can’t find your exact engine code?-> Get quotes for M57D30 BMW 7 Series 730d engine replacement

-> Get quotes for M57D30 BMW 7 Series 730d engine replacement

Common Problems

BMW 7 Series 730d Engine Problems Repair Cost vs Replacement

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.

Common failure points and repair options

Timing Chain Failure

Affected
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.

Repair options

Repair tierDealer priceSpecialist price
Timing chain and tensioner replacement£3,000-£4,500£1,900-£2,800
Full Replacement - rebuilt/reconditioned engine£7,000-£10,000£6,000-£8,500 (matches Section 4 rebuilt figure)
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.
-> Compare rebuilt N57D30 BMW 7 Series 730d engine prices

EGR Cooler Failure

Affected
BMW 7 Series 730d (B57D30A/B, 2015-present)
Typical failure mileage
60,000-100,000 miles
Root cause
The EGR cooler can develop internal leaks, allowing coolant to enter the exhaust system. This can lead to white smoke, coolant loss and potential fire risk - BMW issued recalls for this issue.

Repair options

Repair tierDealer priceSpecialist price
EGR cooler replacement£1,200-£2,000£800-£1,400
Full Replacement - rebuilt/reconditioned engine£6,500-£9,500£5,000-£7,000 (matches Section 4 rebuilt figure)
Our recommendation
Check your VIN against BMW's EGR cooler recall before spending any money - many B57-equipped 730ds are covered. If not covered, a specialist EGR cooler replacement is straightforward and significantly cheaper than a full engine replacement. If the car has overheated, get a compression test before deciding.
-> Compare rebuilt B57D30A/B BMW 7 Series 730d engine prices

DPF Clogging

Affected
BMW 7 Series 730d (all generations, all engine codes)
Typical failure mileage
80,000-120,000 miles (urban-driven cars)
Root cause
The 730d's diesel particulate filter relies on sustained motorway speeds for passive regeneration. Short, stop-start urban journeys prevent this, leading to clogging, warning lights and reduced performance.

Repair options

Repair tierDealer priceSpecialist price
DPF forced regeneration£300-£600£150-£350
DPF cleaning (off-car)£600-£1,000£400-£800
DPF replacement + full engine service£2,500-£4,000£1,800-£2,800
Our recommendation
DPF issues are preventable with regular motorway driving and proper maintenance. If you're mainly using your 730d in town, consider a petrol or hybrid alternative. If the DPF is clogged, start with a forced regeneration - it's the cheapest option. Only replace the DPF if it's physically damaged or cleaning fails repeatedly.
-> Compare BMW 7 Series 730d DPF replacement costs

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.

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FAQ

BMW 7 Series 730d Engine ReplacementFrequently Asked Questions

Everything BMW 7 Series 730d owners usually ask before choosing a rebuilt, reconditioned or used replacement engine.

Why Choose Us

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Comparing quotes for your BMW 7 Series 730d engine replacement is completely free and carries no obligation. Enter your registration or engine code (M57D30, N57D30, B57D30A or B57D30B) above, and our network of vetted UK specialists will provide transparent, itemised pricing for used, reconditioned, and rebuilt engines - all with warranty and nationwide delivery options.

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