BMW 5 Series M550i Engine ReplacementCompare Prices & Get Quotes
Looking for a BMW 5 Series M550i engine replacement- Get quotes today from trusted UK BMW M550i engine specialists and compare prices on reconditioned, rebuilt and used engines for your G30 M550i xDrive.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
From £4,500 to £8,500 [ESTIMATED - using N63 family proxy]
Used from £2,500 · Reconditioned from £4,500 · Common codes: N63B44O2, N63B44T3, N63B44D
From £2,500
Tested, bare/short engine
From £4,500
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 5 Series M550i Replacement Engineto Finding the Best BMW 5 Series M550i Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryBMW 5 Series M550i - Engine History & Specs at a Glance
The BMW M550i xDrive was introduced in 2017 as the flagship M Performance model of the G30 5 Series range, sitting just below the full-fat M5. Powered by BMW's N63 4.4-litre twin-turbo V8, the M550i brought M Division-inspired performance to the executive saloon segment, offering a compelling balance of luxury, everyday usability and explosive power.
Variant HistoryBMW 5 Series M550i - Engine History & Specs at a Glance
The BMW M550i xDrive was introduced in 2017 as the flagship M Performance model of the G30 5 Series range, sitting just below the full-fat M5. Powered by BMW's N63 4.4-litre twin-turbo V8, the M550i brought M Division-inspired performance to the executive saloon segment, offering a compelling balance of luxury, everyday usability and explosive power.
BMW 5 Series M550i
Fuel TypePetrol
Engine Size Range4.4L (4,395cc)
Power Output Range456-530hp across the variant's historyEngine History Timeline
G30 M550i xDrive launched with N63B44O2 4.4L V8 producing 456hp (340kW) and 650Nm of torque
M550i receives the updated N63B44T3 V8 from the M850i boosting output to 523hp (390kW) and 750Nm
Further power increase to 530hp with N63B44D variant
G30 M550i production ends; V8 engine retired from non-M 5 Series models
Key Specs Snapshot
Fuel TypePetrolEngine Size Range4.4L (4,395cc)Power Output Range456-530hp across the variant's historyYears Produced2017-2023Every engine fitted to the BMW 5 Series M550i is covered below, with UK rebuilt pricing and known failure points.
BMW 5 Series M550i Engine Codes - Specifications & Replacement CostBMW 5 Series M550i Engine Codes - Specifications & Replacement Cost
4.4L Petrol V8 Twin-Turbo (G30: 2017-2019)
Power Output456hp (340kW)Years Fitted2017-2019
Compatible Trim Levels
- M550i xDrive
- M550i 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
£6,000-£8,500
Common Failure
Early N63 engines are known for excessive oil consumption, timing chain stretch, and turbocharger failures due to heat soak. The 'hot-vee' design places turbos between cylinder banks, generating extreme under-hood temperatures.
The BMW M550i's N63 V8 is a masterpiece of engineering, delivering effortless performance. However, the 'hot-vee' design - with turbos mounted between the cylinder banks - generates extreme heat that can accelerate wear on gaskets, seals and timing components. Later N63TU3 and N63B44D variants are notably more reliable. A rebuilt M550i engine through EnginesMarket includes upgraded components addressing the original failure points, plus a minimum 12-month unlimited-mileage warranty.
Why the BMW M550i N63 V8 Burns Oil
Affected Vehicles
BMW 5 Series M550i (N63B44O2, N63B44T3, N63B44D)
Typical Failure Mileage
40k-80k
Root Cause
Valve stem seals degrade prematurely due to heat from the hot-vee turbo layout. Many owners report adding a quart of oil every 700-1,000 miles.
Why It Happens
Valve stem seals degrade prematurely due to heat from the hot-vee turbo layout. Many owners report adding a quart of oil every 700-1,000 miles.
Dealer (parts + labour)
£2,500-£4,500
Specialist (parts + labour)
£1,500-£2,800
What it involves
Replacement of valve stem seals, often including cylinder head work
Suitability
Effective fix for oil consumption, but labour-intensive
1 - 2 daysDealer (parts + labour)
£7,000-£12,000
Specialist (parts + labour)
£4,500-£8,500
What it involves
Supply & fit, upgraded components, 12-month warranty
Suitability
When oil consumption is severe or other failures are present
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 |
|---|---|---|---|---|---|
 Valve stem seal replacement Minor | £2,500-£4,500 | £1,500-£2,800 | Replacement of valve stem seals, often including cylinder head work | Effective fix for oil consumption, but labour-intensive | 1 - 2 days |
 Full Replacement - rebuilt/reconditioned engine Best Value | £7,000-£12,000 | £4,500-£8,500 | Supply & fit, upgraded components, 12-month warranty | When oil consumption is severe or other failures are present | 1 - 2 days |
Our Recommendation
Our Recommendation
Valve stem seal replacement is a well-documented fix for N63 oil consumption. If caught early, this is a cost-effective specialist repair. If the engine has suffered from prolonged oil starvation or other failures, a rebuilt unit with warranty is the safer long-term choice.
Don't Let Engine Failure Write Off Your BMW 5 Series M550i
The M550i represents the pinnacle of BMW's M Performance V8 engineering. With regular preventative maintenance - particularly oil consumption monitoring, timing chain inspection and cooling system attention - your M550i can keep delivering that signature twin-turbo V8 character for years to come. If replacement is required, EnginesMarket connects you with UK specialists offering rebuilt N63 units with 12-month warranty and nationwide delivery.
Compare rebuilt BMW 5 Series M550i engine prices
12-Month Minimum
UK Specialists Vetted
Best Price GuidanceImportant Information
Important Information
BMW 5 Series M550i Engine ReplacementFrequently Asked Questions
Question 1How much does a BMW M550i engine replacement cost in the UK-
A BMW M550i N63 V8 engine replacement typically costs £4,500-£8,500 for a rebuilt unit supply-only, with fitted prices ranging from £5,500-£12,000 depending on the specialist. Used engines can be found from £2,500-£5,000.
- Rebuilt N63B44O2 supply: £6,000-£8,500 [ESTIMATED]
- Rebuilt N63B44T3 supply: £6,500-£9,000 [ESTIMATED]
- Rebuilt N63B44D supply: £7,000-£9,500 [ESTIMATED]
- Full supply & fit: £5,500-£12,000 depending on variant and workshop
Question 2What engine codes were used in the BMW M550i-
The BMW M550i xDrive has used three N63 V8 engine codes: N63B44O2 (2017-2019, 456hp), N63B44T3 (2020-2021, 523hp, shared with M850i), and N63B44D (2021-2023, 530hp). The engine code is stamped on the engine block and can also be verified via your VIN.
-> Compare M550i engine prices by codeQuestion 3Is the BMW M550i reliable-
The M550i's reliability depends on the engine iteration. The early N63B44O2 has a reputation for oil consumption, timing chain issues and turbocharger problems. The later N63B44T3 and N63B44D are significantly more reliable, addressing many of the early hot-vee design weaknesses.
- N63B44O2 (2017-2019): Watch for oil consumption and timing chain wear
- N63B44T3 (2020-2021): Improved reliability, coolant leaks remain a concern
- N63B44D (2021-2023): Most robust iteration
Question 4What are the common problems with the BMW M550i engine-
The most common issues across all N63 variants are excessive oil consumption (valve stem seals), timing chain stretch and guide wear, cooling system leaks, and turbo oil feed line failures. The hot-vee design generates extreme under-hood heat which accelerates gasket and seal degradation.
- Valve stem seal replacement: £1,500-£2,800 at specialist
- Timing chain guide replacement: £1,200-£2,500 at specialist
- Cooling system refresh: £600-£1,200 at specialist
- Full engine replacement: £4,500-£8,500 supply-only
Question 5Is it worth replacing the engine in a BMW M550i-
It depends on your M550i's age, mileage and condition. A low-mileage 2020+ M550i (£30,000-£45,000) easily justifies replacement costs. A high-mileage 2017-2019 example (£18,000-£25,000) requires careful evaluation - assess the car's overall condition, service history and whether it's had the N63 customer care package applied.
- Check for full BMW service history - critical for N63 longevity
- Factor in the car's overall condition, not just the engine
- Post-2020 examples with updated N63TU3 are more viable for replacement
Question 6Can I still find parts for the BMW M550i N63 engine-
Yes - the N63 V8 has strong aftermarket and OEM parts support in the UK. Specialists stock timing components, valve stem seals, cooling system parts, turbo oil feed lines and full rebuilt units. The N63 is shared across multiple BMW models (550i, 650i, 750i, X5, X6, X7), ensuring parts availability.
- Timing chain and guide kits readily available
- Valve stem seal kits in good supply
- Full rebuilt units available through EnginesMarket for all N63 codes
Why Choose UsCompare BMW 5 Series M550iEngine PricesToday
N63B44O2, N63B44T3 & N63B44D engines supplied through our network
12-Month Warranty on every rebuilt BMW M550i engine
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Comparing quotes for your BMW 5 Series M550i engine replacement is free, no-obligation, and specific to your exact generation and N63 engine code - whether that's the early 456hp N63B44O2, the 523hp N63B44T3 from the M850i, or the final 530hp N63B44D. Enter your registration above to receive tailored quotes from UK specialists who understand the unique challenges of the hot-vee V8.
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