BMW X6 M50i / M60i2019–present4.4L Twin-Turbo V8

BMW X6 M50i & M60i Engine Replacement —Compare Prices &
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Name: BMW X6 V8 UK Engine Enquiry Data 2025
Creator: BMWEngines.uk

Get quotes today from trusted UK BMW X6 specialists. Compare reconditioned, rebuilt and used 4.4-litre twin-turbo V8 engines — from the N63 to the latest S68 — supply & fit available nationwide.

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BMW X6 M50i/M60i Engines — from £5,500 to £14,000Common codes: N63B44T3, S68B44A

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No Obligation
100% Free
Reconditioned
Rebuilt
Used
Supply & Fit Available
UK-Wide Network

The X6 M50i / M60i Through Time — Era Map

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

Era Note

The most refined N63 generation — 523 hp, 750 Nm. Still requires diligent maintenance.

Era Note

BMW's latest V8 — 523 hp with 48V mild-hybrid. Improved but still early in its reliability cycle.

Generation	Years	Engine Code	Reliability	Recon Cost (Guide)	Era Note
G06 X6 M50i	2019–2023	N63B44T3 / N63TU3(4.4L Twin-Turbo V8)		£6,000–£10,000[PLACEHOLDER]	The most refined N63 generation — 523 hp, 750 Nm. Still requires diligent maintenance.
G06 X6 M60i	2023–present	S68B44A(4.4L Twin-Turbo V8 MHEV)		£7,000–£12,000[PLACEHOLDER]	BMW's latest V8 — 523 hp with 48V mild-hybrid. Improved but still early in its reliability cycle.

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 UKCost Data
VerifiedReliability
ExpertInsights
Updated for2025

BMW X6 M50i / M60i Engine Replacement Costs

Supply Only£6,000 – £10,000
Fitted (Indie)£7,500 – £11,500
Warranty12–24 months
Best ForMost owners — best cost/warranty balance

Engine Type	Supply Only	Fitted (Indie)	Warranty	Best For
Used Engine	£4,500 – £7,500	£6,000 – £9,000	1–6 months	Budget priority; lower-mileage examples
Reconditioned Engine	£6,000 – £10,000	£7,500 – £11,500	12–24 months	Most owners — best cost/warranty balance
Rebuilt Engine	£8,000 – £12,000	£9,500 – £14,000	12–24 months	Long-term ownership; 3+ year horizon
Main Dealer New	£12,000 – £18,000+	£14,000 – £21,000+	24–36 months	Insurance jobs, warranty claims

Figures above reflect the N63 and S68 4.4-litre twin-turbo V8 engines. Used N63 engines typically sit in the £4,500–£7,500 band; reconditioned units range from £6,000–£10,000. The S68 is newer and rarer, commanding higher prices. Labour times for a full V8 replacement can exceed 30 hours.

Labour estimate: Fitting an X6 V8 engine typically takes 18–25 hours at £80–£120/hr (independent) or £140–£200/hr (London/SE dealer). The hot-vee V8 design and tight engine bay make this a labour-intensive job.

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Common Problems With BMW X6 M50i / M60i Engines

1. Excessive Oil Consumption — N63(M50i)

Symptoms: Low oil level warning light, need to add 1 quart of oil every 600–1,000 miles, blue smoke from exhaust on startup, visible oil consumption between services.
Typical Mileage: 30,000–80,000 miles
Repair Cost: £1,500–£4,000 (valve stem seal replacement)【PLACEHOLDER — confirm vs cost sheet】
Replacement Cost: £6,000–£12,000 (if oil starvation leads to engine failure)
Urgency: Check — book inspection urgently

Our recommendation:

The N63's most notorious issue is excessive oil consumption. Class action lawsuits have been filed alleging owners had to add 6–8 quarts of oil between services. The primary cause is valve stem seal failure, allowing oil to enter the combustion chamber. If you notice blue smoke on startup or are constantly topping up oil, have the valve stem seals inspected. Ignoring this can lead to catalytic converter failure and, in extreme cases, engine damage from oil starvation.

Read the full oil consumption guide /failures/n63-oil-consumption

1. Excessive Oil Consumption — N63(M50i)

Symptoms: Low oil level warning light, need to add 1 quart of oil every 600–1,000 miles, blue smoke from exhaust on startup, visible oil consumption between services.
Typical Mileage: 30,000–80,000 miles
Repair Cost: £1,500–£4,000 (valve stem seal replacement)【PLACEHOLDER — confirm vs cost sheet】
Replacement Cost: £6,000–£12,000 (if oil starvation leads to engine failure)
Urgency: Check — book inspection urgently

Our recommendation:

Read the full oil consumption guide /failures/n63-oil-consumption

2. Timing Chain Guide Wear — N63(M50i)

Symptoms: Rattling noise on cold start, metallic ticking from the engine, engine warning light, reduced performance.
Typical Mileage: 60,000–100,000 miles
Repair Cost: £1,500–£3,500 (timing chain guide replacement)【PLACEHOLDER — confirm vs cost sheet】
Replacement Cost: £6,000–£12,000 (if chain skips and valves contact pistons)
Urgency: Immediate — if you hear rattle, book an inspection today

Our recommendation:

The N63's timing chain guides are a known weak point. Plastic guides can become brittle and break over time, sending metal fragments through the engine. The N63TU3 (M50i) has improved guides, but the issue hasn't been eliminated. At the first sign of cold-start rattle, get the chain and guides inspected immediately. Regular oil changes using BMW LL-01 approved oil are essential.

Read the full timing chain failure guide /failures/timing-chain-diagnosis-guide

3. Oil Leaks & Cooling System Issues — N63 & S68(M50i & M60i)

Symptoms: Oil spots under the car, burning oil smell from the engine bay, low oil level warning, visible oil residue around the valve covers or oil filter housing area, coolant loss.
Typical Mileage: 30,000–80,000 miles
Repair Cost: £500–£1,200 (gasket replacement)【PLACEHOLDER — confirm vs cost sheet】
Replacement Cost: N/A — repair only
Urgency: Check — book inspection urgently

Our recommendation:

Oil leaks from the valve cover gaskets and oil filter housing are common on the N63. The hot-vee design means the engine runs hot, which accelerates gasket degradation. The S68 has also been reported to suffer from oil leaks, with some owners experiencing issues within the first 50,000 miles. If you notice oil spots or a burning smell, have the engine inspected promptly. Left unchecked, oil loss can lead to low oil levels and potential engine damage.

Read the full oil leak guide /failures/n55-valve-cover-oil-leak

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X6 M50i / M60i — Repair, Buy, or Replace?

Not every issue means a new engine.Here’s what can be repaired, when it makes sense, and what to check before you buy.

Can It Be Repaired?

Problem	Repairable?	Typical Cost	When It Makes Sense
Valve stem seal failure (N63)	Yes	£1,500 – £4,000	Specialist repair; far cheaper than engine replacement
Timing chain guide wear (N63)	Yes	£1,500 – £3,500	Preventative — catches the fault before catastrophic failure
Oil leaks (N63/S68)	Yes	£500 – £1,200	Well-understood repair; catch it early
Fuel injector failure (N63/S68)	Yes	£600 – £1,500	Specialist repair; cheaper than engine replacement
Timing chain snap (valve contact)	Usually No	£6,000 – £12,000	Typically requires full engine replacement or complete rebuild

ProblemRepairable? · Typical Cost

Valve stem seal failure (N63)

Yes£1,500 – £4,000

Specialist repair; far cheaper than engine replacement

Timing chain guide wear (N63)

Yes£1,500 – £3,500

Preventative — catches the fault before catastrophic failure

Oil leaks (N63/S68)

Yes£500 – £1,200

Well-understood repair; catch it early

Fuel injector failure (N63/S68)

Yes£600 – £1,500

Specialist repair; cheaper than engine replacement

Timing chain snap (valve contact)

Usually No£6,000 – £12,000

Typically requires full engine replacement or complete rebuild

Buying This X6 V8? Check These First

Buy if:

Documented valve stem seal replacement history (N63)
Timing chain guides inspected or replaced (N63)
Oil consumption within acceptable limits (not requiring constant top-ups)
Full service history with BMW LL-01 approved oil
Post-2023 S68 preferred for the latest technology (though long-term reliability is unproven)

Avoid if:

Blue smoke on startup (valve stem seals — N63)
Cold-start rattle (timing chain guides — N63)
Excessive oil consumption with no documented repair (N63)
Poor service history — these V8s are unforgiving of neglect
Engine warning light with no diagnosis

Closing verdict

The X6 M50i and M60i represent the pinnacle of BMW's V8 SUV engineering. The M50i's N63TU3 is the most refined version of BMW's original twin-turbo V8 — significantly improved over early iterations but still demanding meticulous maintenance. The M60i's S68 is BMW's latest V8, featuring a 48V mild-hybrid system and representing a technological leap — but it's too new to have a long-term reliability track record. Both are powerful, luxurious, and rewarding machines. Buy on documented history, not on faith. A well-maintained X6 V8 is a £40,000–£80,000 performance SUV; a neglected one is a £10,000 engine replacement waiting to happen.

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Buying Checklist

Before you buy a used BMW X6 M50i or M60i (or before you commit to an engine replacement), check these:

1. Cold Start
Listen for rattling or ticking (timing chain guide warning — N63)
2. Smoke Check
Blue smoke on startup indicates valve stem seal failure (N63)
3. Oil Consumption
How often does it need topping up? (1 quart per 600–1,000 miles is typical but excessive — N63)
4. Service History
Including which engine (N63TU3 or S68) and confirmed oil-change intervals using BMW LL-01 approved oil
5. Oil Leak Check
Any evidence of oil leaks around the valve covers or oil filter housing?
6. Coolant Check
Any history of coolant loss or overheating?
7. Engine Warning Light
Have codes been read? Any unresolved timing, oil, or fuel system issues?
8. MOT History
Check for emissions-related failures

Why this matters

A 10-minute check now can save you thousands later. The right X6 M50i / M60i is a superb long-term car — the wrong one can be expensive fast.

Buying Checklist

Before you buy a used BMW X6 M50i or M60i (or before you commit to an engine replacement), check these:

1
Cold Start
Listen for rattling or ticking (timing chain guide warning — N63)
2
Smoke Check
Blue smoke on startup indicates valve stem seal failure (N63)
3
Oil Consumption
How often does it need topping up? (1 quart per 600–1,000 miles is typical but excessive — N63)
4
Service History
Including which engine (N63TU3 or S68) and confirmed oil-change intervals using BMW LL-01 approved oil
5
Oil Leak Check
Any evidence of oil leaks around the valve covers or oil filter housing?
6
Coolant Check
Any history of coolant loss or overheating?
7
Engine Warning Light
Have codes been read? Any unresolved timing, oil, or fuel system issues?
8
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 X6 M50i / M60i pitfalls.

Market Intelligence

Real data from thousands of X6 M50i / M60i enquiries in 2025.

Most Common Failure (M50i)Excessive oil consumption

Valve stem seal failure is the primary cause; class action lawsuits have been filed

Most Common Failure (M60i)Oil leaks

Early reports indicate valve cover gasket and oil filter housing issues

Average Enquiry Mileage

30,000–60,000

miles

[PATTERN DATA]

Average Replacement Cost

£6,000–£10,000

reconditioned, supply only

[PLACEHOLDER]

Most Requested Engine Code

N63B44T3 / S68B44A

[PATTERN DATA]

Peak Enquiry Season

Winter

Cold starts expose timing chain and valve seal issues

[PATTERN DATA]

Regional Demand

London: 20%
South East: 18%
North West: 12%
Other Regions: 50%

[PATTERN DATA]

Regional Demand Breakdown

20%London18%South East12%North West50%Other Regions

Frequently Asked Questions

A reconditioned N63 or S68 4.4-litre V8 engine typically costs £6,000–£12,000 supply only. Used engines are available from £4,500–£7,500. Fitting adds £1,500–£2,500 depending on your location and workshop. Labour times can exceed 30 hours for a full V8 replacement. Main dealer new engines can exceed £15,000.

The N63TU3 (M50i) is the most refined version of BMW's original twin-turbo V8. Early N63s (2008–2013) had a well-documented reputation for excessive oil consumption, valve stem seal failure, timing chain stretch, and failing injectors. The N63TU3 addressed many of these issues, but the engine still demands meticulous maintenance. According to some sources, the N63 remains a demanding engine that requires careful ownership.

The S68 is BMW's latest V8, introduced in 2022. It's too new to have a long-term reliability track record. Early reports indicate potential issues with oil leaks, fuel injector failures, and overheating. The engine is complex and requires regular maintenance. It's promising but unproven long-term.

M50i (N63TU3): Excessive oil consumption (valve stem seal failure), timing chain guide wear, oil leaks from valve cover gaskets and oil filter housing, turbocharger issues, and cooling system failures. M60i (S68): Oil leaks, fuel injector failures, overheating, and electrical issues. The specific issues depend on which engine you have.

Depends on vehicle value and which generation. Against a well-kept £40,000 M50i, an £8,000 recon is 20% — worth it. Against a tired £20,000 example, the same recon approaches our 70% BMW threshold — get a scrap valuation first. M60i values are higher — a £9,000 recon against a £60,000 car is 15% — definitely worth it.

Listed on the VIN plate and vehicle documentation. G06 M50i (2019–2023): N63B44T3 / N63TU3. G06 M60i (2023–present): S68B44A. The chassis code and badge are the easiest tells — M50i for 2019–2023, M60i for 2023–present.

Disclaimer: 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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BMW X6 M50i & M60i Engine Replacement —Compare Prices &Get Quotes

The X6 M50i / M60i Through Time — Era Map

BMW X6 M50i / M60i Engine Replacement Costs

Common Problems With BMW X6 M50i / M60i Engines

1. Excessive Oil Consumption — N63(M50i)

2. Timing Chain Guide Wear — N63(M50i)

3. Oil Leaks & Cooling System Issues — N63 & S68(M50i & M60i)

1. Excessive Oil Consumption — N63(M50i)

2. Timing Chain Guide Wear — N63(M50i)

3. Oil Leaks & Cooling System Issues — N63 & S68(M50i & M60i)

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X6 M50i / M60i — Repair, Buy, or Replace?

Can It Be Repaired?

Buying This X6 V8? Check These First

Buying Checklist

Buying Checklist

Market Intelligence

Regional Demand Breakdown

Frequently Asked Questions

Why UK BMW X6 V8 Owners Trust BMWEngines.uk

Trusted X6 V8 Suppliers

Compare X6 V8 Engine Replacement Companies

UK Engine Replacement Services for X6 V8

BMW X6 M50i & M60i Engine Replacement —Compare Prices &
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