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BMW N62B48 Engine - Replacement Cost, Problems & CompatibilityProblems & Compatibility
The BMW N62B48 is the 4.8-litre V8 petrol engine that powered the E65 7-Series, E60 5-Series, E53 X5 and E63/E64 6-Series between 2002 and 2009 - reconditioned units from approximately £2,500-£4,000, with steady demand from owners of this high-performance V8.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
Used from
£1,200
Reconditioned from
£2,500
Rebuilt from
£4,000
GB
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Key Specs
BMW N62B48 - Specifications at a Glance
Engine Code
N62B48 (N62/TU variants)
Fuel
Petrol
Configuration
4.8L V8, DOHC 32-valve, Double VANOS, Valvetronic
Power Output(s)
355-367 hp (260-270 kW) depending on application
Years Produced
2002-2009
UK Models Fitted
4 BMW model families - full list in Compatibility below
2025 UK Replacement Requests
Replaced
[M62B44 - LINK PENDING - page not in current inventory]
Replaced By
[N63B44 - LINK PENDING - page not in current inventory]
Most Common Failure
Coolant leaks / valve stem seal wear
Reconditioned Price Range
£2,500-£4,000 supply-only
Vetted UK specialists for N62B48 replacements
Minimum 12-month warranty on reconditioned and rebuilt options
Fitted To
Which BMW Models Use the N62B48-
**TAG:** Fitted To
| Model | Generation/Chassis | Badge(s) | Years | Link |
|---|---|---|---|---|
 BMW 7 Series | E65/E66 | 750i / 750Li (360 hp) | 2002-2008 | |
 BMW 5 Series | E60/E61 | 550i (367 hp) | 2005-2009 | |
| BMW 6 Series | E63/E64 | 650i (367 hp) | 2005-2009 | |
| BMW X5 | E53 | X5 4.8is (355 hp) | 2004-2006 | |
| BMW X5 | E70 | X5 4.8i (350 hp) | 2006-2009 |
02
BMW 5 Series
03
BMW 6 Series
04
BMW X5
05
BMW X5
CROSS-BRAND
N62B48 is documented across 5 BMW applications spanning BMW 7 Series, BMW 5 Series, BMW 6 Series, BMW X5. Registration lookup confirms the exact suffix before quotes are sent.
Not sure which engine your car has?
Not sure which engine your car has- Enter your registration above - we'll confirm your exact N62B48 fitment before any quotes are sent.
Prices
BMW N62B48 Engine Replacement Cost (UK)
Condition | Supply Only | Fitted (Independent Specialist) | Typical Warranty |
|---|---|---|---|
Used | £1,200-£2,200 | £1,800-£3,200 | 3-6 months |
Reconditioned | £2,500-£4,000 | £3,100-£4,800 | 12-24 months |
Rebuilt | £4,000-£6,000 | £4,600-£6,800 | 12-24 months |
All figures . Fitted = supply price + labour band below.
Labour Guide
Fitting an N62B48 typically takes 14-18 hours at £65-£91/hr (independent specialist) - confirm exact labour when comparing quotes.
Price Factors
What moves the price on an N62B48 is the condition of the cooling system, whether the valve stem seals have been replaced, and whether the alternator bracket oil leak has been addressed. A reconditioned unit that includes new seals, coolant pipes and gaskets commands a premium over a used take-out. The rare X5 4.8is variant may carry a premium due to lower production numbers. See our full reconditioned engine cost guide.
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Common Problems
BMW N62B48 Engine Problems - What Actually Fails
Every engine has its weak points. Here are the known issues with the N62B48, based on real-world data and verified failure patterns.
Verified issue focus: Coolant leaks / valve stem seal wear.
1. Cooling System Leaks - Valley Pan & Coolant Pipes
1. Cooling System Leaks - Valley Pan & Coolant Pipes
Typical onset:
60,000-100,000 miles
What happens:
The N62's cooling system has several known weak points. The valley pan (under the intake manifold) is a common source of coolant leaks, as are the plastic coolant pipes that run across the engine. The N62/TU variant improved some of the coolant routing but still suffers from plastic component degradation with age. These leaks can cause overheating if left unaddressed, leading to warped cylinder heads.
Repair vs replace:
If caught early, valley pan and coolant pipe replacement is a manageable repair (£800-£1,500) - though it's labour-intensive due to intake manifold removal. If the engine has overheated, head gasket failure or warped heads are likely - in which case a full replacement is often more cost-effective. Read our full cooling system failure guide
Read more about this issue
2. Valve Stem Seal Wear - Blue Smoke on Start-Up
2. Valve Stem Seal Wear - Blue Smoke on Start-Up
Typical onset:
50,000-90,000 miles
What happens:
The N62's valve stem seals degrade over time, allowing oil to seep past them into the combustion chambers. This manifests as blue smoke on cold start-up, and in severe cases, during driving. This is one of the most well-documented N62 issues and affects both the 4.4L and 4.8L variants.
Repair vs replace:
Valve stem seal replacement is a labour-intensive job (£2,000-£3,500) and requires specialist tooling. If the engine is out for other work (e.g., clutch, timing chain), many owners combine this with the seal replacement. If the car is high-mileage and the engine has other issues, a reconditioned unit may be more cost-effective. Read our full valve stem seal failure guide
Read more about this issue
3. Alternator Bracket Oil Leak - The "N62 Nightmare"
3. Alternator Bracket Oil Leak - The "N62 Nightmare"
Typical onset:
60,000-120,000 miles
What happens:
The N62's alternator bracket contains an oil passage that is sealed by O-rings. These O-rings fail over time, causing a slow oil leak that can be difficult to diagnose. The leak drips onto the exhaust manifold, creating a burning oil smell. If ignored, oil loss can lead to low oil pressure and bearing damage.
Repair vs replace:
Alternator bracket seal replacement is a specialist job (£500-£1,000) requiring the alternator and associated components to be removed. While not catastrophic on its own, combined with valve stem seal wear and cooling system issues, it can make a used engine a poor investment. A reconditioned unit will have all these seals refreshed.
Read more about this issue
The N62/TU (Technical Update) variant, introduced from 2005 onwards, improved some of the cooling system routing and used updated software. However, the valve stem seal and alternator bracket issues affect all N62 engines regardless of production year - these are material degradation issues, not production-run problems.
Compare rebuilt N62B48 prices with the cooling system and seals already addressed
Engine Variants
N62B48 Sub-Codes Explained - Which One Is in Your Car-
The N62B48 was produced in several variants across the BMW range, with output varying from 350 hp in the E70 X5 to 367 hp in the E60 550i. The differences are primarily in ECU calibration and intake/exhaust tuning rather than hardware changes. - Fitted to: E65/E66 750i / 750Li (2002-2008) - Key technical difference: Standard N62 configuration, 360 hp, electronic throttle, specific intake and exhaust tuning for luxury saloon application - Sub-code-specific failure note: Shares the family cooling system and valve stem seal failure patterns above - Interchange note: Not a straight swap with the E53 X5 variant - X5 uses different engine mounts, sump and ancillaries - Fitted to: E60/E61 550i (2005-2009), E63/E64 650i (2005-2009) - Key technical difference: Revised ECU calibration, freer-flowing intake and exhaust, 367 hp output, Valvetronic calibration optimised for sportier response - Sub-code-specific failure note: Shares the family valve stem seal wear pattern; higher output may accelerate wear on high-mileage examples - Interchange note: Not a straight swap with 7-Series variant - ECU, wiring and ancillaries differ. Requires full electronics transplant if swapping between chassis - Fitted to: E53 X5 4.8is (2004-2006), E70 X5 4.8i (2006-2009) - Key technical difference: Lower output (350-355 hp) for SUV application, different oil sump and engine mounts to suit SUV chassis, reinforced ancillaries - Sub-code-specific failure note: Shares the family cooling system issues; the E53 4.8is is particularly prone to cooling system stress due to towing and off-road use - Interchange note: Not a straight swap with saloon/coupe variants - sump, mounts and ancillaries differ significantly. Use the correct variant for your chassis - Fitted to: All N62B48 applications from 2005 onwards - Key technical difference: Technical Update with revised cooling system routing, updated DME calibration, improved Valvetronic software, minor hardware refinements - Sub-code-specific failure note: Improved cooling system design but still shares the family valve stem seal and alternator bracket oil leak issues - Interchange note: Later TU engines can be fitted to earlier cars with ECU reflash, but always match the engine management version. Not a straight plug-and-play swap
How to confirm your code: The engine code is stamped on a metal plate on the left-hand side of the block, near the timing cover. The V5C logbook lists the full engine number (the first 7 characters identify the variant). For TU variants, the engine number may include a "TU" designation on the code plate. Enter your registration above and we'll confirm your exact variant before any quotes are sent.
Easily Confused
M62B44
LINK PENDING - page not in current inventory] - the 4.4-litre V8 that preceded the N62 family in the E39 5-Series and E38 7-Series. The M62 used simpler single/double VANOS without Valvetronic - less complex but suffered from timing chain guide failure that the N62 largely resolved.
Alternative / Next-Gen Code
N63B44
LINK PENDING - page not in current inventory] - the 4.4-litre twin-turbo V8 that replaced the N62 family from 2008 onwards. Introduced the hot-vee design (turbos inside the V) and produced 400-450 hp - but suffered from its own set of heat-related issues.
Confirm the exact N62B48 fitment
How to confirm your code: The engine code is stamped on a metal plate on the left-hand side of the block, near the timing cover. The V5C logbook lists the full engine number (the first 7 characters identify the variant). For TU variants, the engine number may include a "TU" designation on the code plate. Enter your registration above and we'll confirm your exact variant before any quotes are sent.
Buying Guide
Buying a Replacement N62B48 - What to Choose
Choosing the right replacement route depends on your budget, risk tolerance, and ownership goals. Here's a breakdown of your options.
Used:
A used N62B48 can make sense for lower-value E65 750i or E53 X5 owners where the car's value doesn't justify a recon unit. However, the N62's known issues (cooling system leaks, valve stem seal wear, alternator bracket oil leaks) mean only consider a used unit with documented proof of recent work in these areas. Without that, factor in £2,000-£4,000 for preventative work (valve stem seals, coolant pipes, alternator bracket seals). Link once: /services/used-engines
Reconditioned:
A proper N62B48 recon is the best option for owners planning to keep their car long-term. A quality recon should include: full strip and inspection, new valve stem seals (critical), replacement of all plastic coolant pipes and valley pan, alternator bracket seals, new gaskets and seals, and a full test. With a 12-24 month warranty, this gives you peace of mind that the engine's known weaknesses have been engineered out - well worth the £2,500-£4,000 supply cost for a high-value V8 BMW. Link once: /services/reconditioned-engines
Rebuilt:
A full rebuild is justified when the original engine has suffered catastrophic failure (overheating, oil starvation) and the car is a low-mileage cherished classic (especially the E53 X5 4.8is, which has started gaining collector interest). An upgraded rebuild should include new pistons/rings, refreshed cylinder heads, new timing chains and guides, and a full cooling system overhaul. This is specialist territory and typically only makes sense for cars with strong residual value (£10,000+). Link once: /services/rebuilt-engines
Supply & Fit Line:
All engines can be supplied and fitted through our network of vetted BMW specialists nationwide, with 12-month warranty on reconditioned and rebuilt units. Link once: /services/supply-and-fit
Vehicle Value Note:
The N62B48 sits in E65 750i, E60 550i, E63/E64 650i and E53/E70 X5 - cars now worth £2,500-£15,000 depending on condition. With a reconditioned supply cost of £2,500-£4,000, replacement is viable on mid-range to higher-value examples. However, for a sub-£3,000 E65 750i or E53 X5, a used unit (£1,200-£2,200) with documented history may be the only sensible option. The rare E53 X5 4.8is, with its growing classic status, may justify a reconditioned unit even on lower-value examples. For cars needing significant body or suspension work and worth under £3,000, consider breaking the car before committing to a replacement engine.
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Related Engines
Engines Related to the BMW N62B48
Explore engines that are closely related to the BMW N62B48, including its predecessor, successor, and key family variants.
Predecessor
M62B44
LINK PENDING - page not in current inventory] - the 4.4-litre V8 that preceded the N62 family in the E39 5-Series and E38 7-Series. The M62 used simpler single/double VANOS without Valvetronic - less complex but suffered from timing chain guide failure that the N62 largely resolved.
Successor
N63B44
LINK PENDING - page not in current inventory] - the 4.4-litre twin-turbo V8 that replaced the N62 family from 2008 onwards. Introduced the hot-vee design (turbos inside the V) and produced 400-450 hp - but suffered from its own set of heat-related issues.
FAQ
BMW N62B48Frequently Asked Questions
Question 1How much does a BMW N62B48 engine replacement cost-
A reconditioned N62B48 supply-only costs approximately £2,500-£4,000, with fitted prices ranging from £3,100 to £4,800 depending on labour rates. Used units start at £1,200-£2,200, and full rebuilds run from £4,000-£6,000. Prices are supply-only; fitting adds 14-18 hours at independent specialist rates. Warranty varies: 3-6 months on used, 12-24 months on reconditioned and rebuilt.
- Prices are supply-only; fitting adds 14-18 hours at independent specialist rates.
- Warranty varies: 3-6 months on used, 12-24 months on reconditioned and rebuilt.
Question 2What are the most common failures on the N62B48-
The most documented issues are cooling system leaks (valley pan and plastic coolant pipes), valve stem seal wear (causing blue smoke on start-up), and alternator bracket oil seal failure. These three issues are the N62 family's most notorious weaknesses, affecting all variants regardless of production year. Cooling system: replace valley pan and pipes as preventative. Valve stem seals: replacement is labour-intensive but restores performance. Alternator bracket seals: address early to prevent oil loss.
- Cooling system: replace valley pan and pipes as preventative.
- Valve stem seals: replacement is labour-intensive but restores performance.
- Alternator bracket seals: address early to prevent oil loss.
Question 3Which BMW models use the N62B48 engine-
The N62B48 was fitted to E65/E66 750i/750Li (2002-2008, 360 hp), E60/E61 550i (2005-2009, 367 hp), E63/E64 650i (2005-2009, 367 hp), E53 X5 4.8is (2004-2006, 355 hp), and E70 X5 4.8i (2006-2009, 350 hp). Not to be confused with the N62B40 (4.0L) or the later N63 family. The E53 X5 4.8is is the rarest application and has gained collector interest.
- Not to be confused with the N62B40 (4.0L) or the later N63 family.
- The E53 X5 4.8is is the rarest application and has gained collector interest.
Question 4Should I buy a used or reconditioned N62B48 engine-
A used N62B48 can be viable for lower-value E65 750i or E53 X5 owners, but only if it has documented proof of recent valve stem seal replacement, cooling system work, and alternator bracket seal replacement. Without that, factor in £2,000-£4,000 for preventative work. A reconditioned engine is the safer choice - it includes new seals, coolant pipes, and gaskets, with a 12-24 month warranty. Used is cheaper (£1,200-£2,200) but the N62's multiple failure points make risk significant. Reconditioned addresses all known weak points and gives peace of mind.
- Used: cheaper (£1,200-£2,200) but the N62's multiple failure points make risk significant.
- Reconditioned: addresses all known weak points and gives peace of mind.
Question 5How do I confirm which N62B48 variant my car has-
Check the engine code stamped on the block (left-hand side near the timing cover). The E65/E66 750i uses the standard 360 hp variant; the E60/E61 550i and E63/E64 650i use the 367 hp high-output variant; the E53 X5 4.8is uses 355 hp; and the E70 X5 4.8i uses 350 hp. The V5C logbook lists the full engine number. ECU calibration and ancillaries differ between variants. X5 variants use different sump and engine mounts - not a straight swap.
- ECU calibration and ancillaries differ between variants.
- X5 variants use different sump and engine mounts - not a straight swap.
Question 6How long does an N62B48 engine typically last-
With meticulous maintenance and early preventative work, these engines can exceed 120,000-150,000 miles. The N62 is fundamentally robust; the limiting factors are the cooling system plastics, valve stem seals, and alternator bracket seals. Valve stem seal replacement strongly recommended at 60k-90k miles. Cooling system overhaul (valley pan, pipes) at 80k-100k miles. Regular oil changes (5,000-8,000 miles) with BMW-spec oil are essential.
- Valve stem seal replacement strongly recommended at 60k-90k miles.
- Cooling system overhaul (valley pan, pipes) at 80k-100k miles.
- Regular oil changes (5,000-8,000 miles) with BMW-spec oil are essential.
Compare BMW N62B48 Engine Prices Today
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