BMW 5 Series M550d Engine ReplacementCompare Prices & Get Quotes
Get quotes today from trusted UK BMW 5 Series M550d engine specialists. Compare prices on reconditioned, rebuilt and used engines for your M Performance diesel - featuring the N57S tri-turbo or B57 quad-turbo 3.0-litre straight-six.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
From £4,500 to £8,500
Used from £2,500 · Reconditioned from £4,500 · Common codes: N57D30C, B57D30S0, B57D30C
From £2,500
Tested, bare/short engine
From £4,500
Rod bearings addressed, tested
From quote
Upgraded bearings, full teardown, revised valvetrain
Secure enquiry - no spam, no pressure. Genuine quotes only from vetted UK BMW 5 Series M550d specialists.
3 Simple Steps3 Simple Stepsto Finding the Best BMW 5 Series M550d Replacement Engineto Finding the Best BMW 5 Series M550d Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryBMW 5 Series M550d - Engine History & Specs at a Glance
The BMW M550d was the flagship diesel M Performance model of the 5 Series range, positioned below the M5 but offering immense torque and all-weather performance. It debuted in 2012 with a revolutionary tri-turbo straight-six, later replaced by an even more extreme quad-turbo setup in the G30 generation.
Variant HistoryBMW 5 Series M550d - Engine History & Specs at a Glance
The BMW M550d was the flagship diesel M Performance model of the 5 Series range, positioned below the M5 but offering immense torque and all-weather performance. It debuted in 2012 with a revolutionary tri-turbo straight-six, later replaced by an even more extreme quad-turbo setup in the G30 generation.
BMW 5 Series M550d
Fuel TypeDiesel
Engine Size3.0L (2,993cc)
Power Output Range381-400hp across the variant's historyEngine History Timeline
2016 (F10/F11) - N57D30C (N57S) 3.0L straight-six diesel tri-turbo, 381hp, 740Nm
2023 (G30/G31) - B57D30S0 (B57S) 3.0L straight-six diesel quad-turbo, 400hp, 760Nm
present (G60) - M550d discontinued; replaced by electrified M Performance models
Key Specs Snapshot
Fuel TypeDieselEngine Size3.0L (2,993cc)Power Output Range381-400hp across the variant's historyYears Produced2012-2023Every engine fitted to the BMW 5 Series M550d is covered below, with UK rebuilt pricing and known failure points.
BMW 5 Series M550d Engine Codes - Specifications & Replacement CostBMW 5 Series M550d Engine Codes - Specifications & Replacement Cost
3.0L Tri-Turbo Straight-Six Diesel (2012-2016)
Power Output381hp (280kW)Torque740NmYears Fitted2012-2016 (F10/F11 generation)
Compatible Trim Levels
- M550d xDrive Saloon
- M550d xDrive Touring
- M550d xDrive M Sport
Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£2,500-£4,000
Reconditioned
Addressed known issues, tested
£4,500-£6,500
Rebuilt
Full teardown, upgraded internals
£5,500-£8,000
Common Failure
The N57S is known for timing chain tensioner failure - the N57 engine suffers from rear-positioned timing chain issues similar to the N47. Turbocharger failures are also reported, often due to oil starvation. Fuel injector problems can cause rough idling. Some M550d and 750d units received incorrect software updates intended for X5/X6 M50d models, causing exhaust purification issues.
The BMW M550d uses two very different engines depending on generation - the N57S tri-turbo (F10/F11) and the B57S quad-turbo (G30/G31). The N57S is more prone to timing chain and turbocharger issues, while the B57S is significantly more reliable but still has its weak points. Rebuilt engines through EnginesMarket include upgraded components addressing the original failure points, plus a minimum 12-month unlimited-mileage warranty.
Why the N57S M550d Is at Risk
Affected Vehicles
BMW 5 Series M550d (N57D30C, 2012-2016)
Typical Failure Mileage
80,000-120,000 miles
Root Cause
The N57 engine suffers from the same rear-positioned timing chain issues as the N47. The timing chain tensioner can fail, leading to chain stretch and, if ignored, catastrophic engine damage.
Why It Happens
The N57 engine suffers from the same rear-positioned timing chain issues as the N47. The timing chain tensioner can fail, leading to chain stretch and, if ignored, catastrophic engine damage.
Dealer (parts + labour)
£2,000-£3,500
Specialist (parts + labour)
£1,200-£2,200
What it involves
Replace chain, tensioner and guides - engine-out job
Suitability
Best if caught early with rattle symptoms
1 - 2 daysDealer (parts + labour)
£8,000-£12,000
Specialist (parts + labour)
£5,500-£8,000
What it involves
Supply & fit, upgraded components, 12-month warranty
Suitability
Best if chain has failed causing valve/piston 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 replacement Minor | £2,000-£3,500 | £1,200-£2,200 | Replace chain, tensioner and guides - engine-out job | Best if caught early with rattle symptoms | 1 - 2 days |
 Full Replacement - rebuilt/reconditioned engine Best Value | £8,000-£12,000 | £5,500-£8,000 | Supply & fit, upgraded components, 12-month warranty | Best if chain has failed causing valve/piston damage | 1 - 2 days |
Vehicle Value Check
Vehicle Value Check
A typical used BMW M550d (F10/F11, 2012-2016) sits in the £12,000-£25,000 bracket. For a car worth under £15,000, a full engine replacement may represent 30-50% of the vehicle's value - evaluate carefully. For well-maintained, low-mileage examples worth £20,000+, replacement is usually justified.
Our Recommendation
Our Recommendation
If you hear a cold-start rattle from your N57S M550d, get the timing chain inspected immediately. A £1,200-£2,200 chain replacement is far cheaper than a £5,500+ full engine replacement if the chain fails catastrophically.
Don't Let Engine Failure Write Off Your BMW 5 Series M550d
The M550d is a rare and special car - a diesel M Performance model with immense torque and capability. Whether you're facing timing chain issues on an N57S, turbocharger problems on either generation, or the rare need for a full replacement, EnginesMarket connects you with vetted UK specialists who understand the M550d's complex powertrain. Every rebuilt engine comes with a 12-month warranty, upgraded components, and nationwide delivery options - all at a fraction of dealer pricing.
Compare rebuilt N57D30C BMW 5 Series M550d 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 5 Series M550d. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier."
BMW 5 Series M550d Engine ReplacementFrequently Asked Questions
Question 1How much does a BMW 5 Series M550d engine replacement cost in the UK-
A BMW M550d engine replacement is a significant investment due to the complex tri-turbo or quad-turbo setup. For the N57D30C (F10/F11, 2012-2016), rebuilt units range from £5,500-£8,000. For the B57D30S0 (G30/G31, 2017-2023), expect £6,000-£8,500. Labour for supply and fit adds approximately £1,300-£2,000 (20-30 hours at independent specialist rates) due to the engine's complexity.
- Used engine: £2,500-£4,500 depending on code
- Reconditioned: £4,500-£7,500
- Rebuilt: £5,500-£8,500
- Supply & fit: add £1,300-£2,000 in labour
Question 2Does the BMW M550d have timing chain problems-
Yes - but it depends on the generation. The N57S engine (F10/F11, 2012-2016) suffers from the same rear-positioned timing chain issues as the N47, with chain stretch and tensioner failure possible between 80,000-120,000 miles. The B57S engine (G30/G31, 2017-2023) is significantly more robust, with timing chain stretch and guide failures being exceedingly rare.
- N57S: timing chain is a known weak point
- B57S: timing chain issues are rare
- Cold-start rattle is the first warning sign on N57S
Question 3Is it worth replacing the engine in a BMW M550d-
It depends on the generation and the car's value. A typical F10/F11 M550d (2012-2016) is worth £12,000-£25,000, making a £5,500-£8,000 replacement a significant but often viable investment for well-maintained examples. A G30/G31 M550d (2017-2023) is worth £25,000-£45,000, making a £6,000-£8,500 replacement easily justified. For cars at the lower end of the value spectrum, evaluate carefully.
- F10/F11 M550d: replacement typically 25-50% of vehicle value
- G30/G31 M550d: replacement typically 15-25% of vehicle value
- Rebuilt engines include 12-month warranty
Question 4What's the difference between the N57S and B57S engines in the M550d-
The N57S (F10/F11, 2012-2016) is a 3.0-litre tri-turbo straight-six diesel producing 381hp and 740Nm. The B57S (G30/G31, 2017-2023) is a 3.0-litre quad-turbo straight-six diesel producing 400hp and 760Nm. The B57S is significantly more reliable, with far fewer timing chain issues, though both engines share turbocharger complexity.
- N57S: tri-turbo, 381hp, 740Nm - timing chain is a known issue
- B57S: quad-turbo, 400hp, 760Nm - more reliable, timing chain issues rare
Question 5How long does a BMW M550d engine replacement take-
A typical BMW M550d engine replacement takes 4-7 working days for supply and fit through an independent specialist. The complex tri-turbo or quad-turbo setup requires significantly more labour than a standard diesel engine. Allow additional time for parts sourcing and any ancillary work.
- Typical turnaround: 4-7 working days
- Supply only: 1-3 days for dispatch
- Full replacement: 5-8 days including testing
- Complex turbo system adds to labour time
Question 6What warranty comes with a BMW M550d replacement engine-
Every rebuilt and reconditioned BMW M550d engine supplied through EnginesMarket carries a minimum 12-month unlimited-mileage warranty. Terms vary by supplier - some offer extended coverage up to 24 months on premium rebuilds. Used engines typically come with a shorter warranty (30-90 days) depending on the supplier and mileage.
- Rebuilt/reconditioned: 12 months minimum, unlimited mileage
- Premium rebuilds: up to 24 months available
- Used engines: 30-90 days typically
- Always confirm exact terms with your chosen supplier
Why Choose UsCompare BMW 5 Series M550dEngine PricesToday
50+ BMW M550d engines supplied through our network
12-Month Warranty on every rebuilt M550d engine
Nationwide UK delivery
supply & fit available
Comparing quotes for your BMW 5 Series M550d is free, quick, and carries no obligation. Enter your registration above to get matched with vetted UK specialists who stock the correct engine for your specific generation - whether that's the N57S tri-turbo (F10/F11) or the B57S quad-turbo (G30/G31). Whether you need a used, reconditioned, or fully rebuilt unit - with or without fitment - we'll connect you with the right supplier at the right price.
Enter your registration
and get matched with verified BMW 5 Series M550d specialists.