How much does a BMW X6 M50i or M60i engine replacement cost in the UK?

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.

Is the BMW X6 M50i engine reliable?

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.

Is the BMW X6 M60i engine reliable?

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.

What are the common problems with the BMW X6 M50i and M60i?

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.

Is it worth replacing a BMW X6 V8 engine, or should I scrap the car?

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.

How do I find my BMW X6 engine code?

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.

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

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

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

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

Instant QuotesNo Obligation100% FreeReconditionedRebuiltUsedSupply & Fit AvailableUK-Wide Network

The X6 M50i / M60i THROUGH TIME - Era Map

Four generations. Four 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.

GenerationYearsEngine CodeReliabilityRecon CostEra Note

G06 X6 M50i BMW 320d G06 X6 M50i

2019–2023N63B44T3 / N63TU3 (4.4L Twin-Turbo V8)★★★★☆ [NEWLY ASSIGNED - see Data Note]£6,000–£10,000 [PLACEHOLDER - confirm vs cost sheet]The most refined N63 generation - 523 hp, 750 Nm. Still requires diligent maintenance.

G06 X6 M60i BMW 320d G06 X6 M60i

2023–presentS68B44A (4.4L Twin-Turbo V8 MHEV)★★★½☆ [NEWLY ASSIGNED - see Data Note]£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?

This table is the single source every other section on this page matches - Sections 2, 4 and 6 reference it rather than restating conflicting figures.

Real UK Cost Data

Verified Reliability

Expert Insights

Updated for 2025

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 TypeSupply OnlyFitted (Indie)WarrantyBest For

Used Engine£4,500–£7,500£6,000–£9,0001–6 monthsBudget priority; lower-mileage examples

Reconditioned Engine£6,000–£10,000£7,500–£11,50012–24 monthsMost owners - best cost/warranty balance

Rebuilt Engine£8,000–£12,000£9,500–£14,00012–24 monthsLong-term ownership; 3+ year horizon

Main Dealer New£12,000–£18,000+£14,000–£21,000+24–36 monthsInsurance 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.

→ Compare X6 V8 engine prices from UK specialists

Common Problems With BMW 320d 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)

🟠 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

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)

🟠 Check - book inspection urgently

Our recommendation:

Read the full oil consumption guide

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)

🔴 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

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

🟠 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

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

Every 320d has a story. Make the right call with clear data, real-world costs, and honest guidance from UK specialists.

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

Every 320d has a story. Make the right call with clear data, real-world costs, and honest guidance from UK specialists.

Can It Be Repaired?

ProblemRepairable?Typical CostWhen It Makes SenseValve stem seal failure (N63)✅ Yes£1,500–£4,000Specialist repair; far cheaper than engine replacementTiming chain guide wear (N63)✅ Yes£1,500–£3,500Preventative - catches the fault before catastrophic failureOil leaks (N63/S68)✅ Yes£500–£1,200Well-understood repair; catch it earlyFuel injector failure (N63/S68)✅ Yes£600–£1,500Specialist repair; cheaper than engine replacementTiming chain snap (valve contact)❌ Usually No£6,000–£12,000Typically 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.

Don't guess.Get the right engine at the right price.

→ Compare X6 V8 engine prices before you buy

Don't Guess. Compare.

Get real quotes from vetted UK specialists and make the right call for your 320d.

→ Compare X6 V8 engine prices before you buy

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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:

Cold Start

Listen for rattling or ticking (timing chain guide warning - N63)

Smoke Check

Blue smoke on startup indicates valve stem seal failure (N63)

Oil Consumption

How often does it need topping up? (1 quart per 600–1,000 miles is typical but excessive - N63)

Service History

including which engine (N63TU3 or S68) and confirmed oil-change intervals using BMW LL-01 approved oil

Oil Leak Check

Any evidence of oil leaks around the valve covers or oil filter housing?

Coolant Check

Any history of coolant loss or overheating?

Engine Warning Light

Have codes been read? Any unresolved timing, oil, or fuel system issues?

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 320d pitfalls.

Buy smart. Drive with confidence.

A few checks today can save thousands tomorrow. Use this checklist to avoid the most common 320d pitfalls.

BMW 320d Engine Codes

This table's rows match Section 1B's Era Map exactly.

Engine CodeYearsPower2025 EnquiriesAvg. Recon Cost

Technical Specs

N63B44T3 (M50i)Displacement: 4,395 cc · Cylinders: V8, 90° configuration, 4 valves per cylinder · Compression Ratio: 10.5:1 · Fuel: Direct injection · Turbo: Two twin-scroll turbochargers (hot-vee) · Valvetrain: Double VANOS

S68B44A (M60i)Displacement: 4,395 cc · Cylinders: V8, 90° configuration, 4 valves per cylinder · Compression Ratio: 10.5:1 · Fuel: Direct injection · Turbo: Two twin-scroll turbochargers (hot-vee) · 48V mild-hybrid system

→ Compare X6 V8 engine prices for your BMW

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Market Intelligence

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 - confirm vs cost sheet]

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

London20%

South East18%

North West12%

PATTERN DATA

Regional Demand Breakdown

20%London

18%South East

12%North West

BMW 320d - Frequently Asked Questions

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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As standard

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