BMW 6 Series 630i Engine ReplacementCompare Prices & Get Quotes
Get quotes today from trusted UK BMW 6 Series 630i engine specialists. Compare prices on reconditioned, rebuilt and used N52B30, N53B30 and B48B20 engines for your E63, E64, F06, F12, F13 or G32 630i with our free, no-obligation quote comparison.
Supply & Fit Available
12-Month Warranty
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From £2,125 to £5,500
Used from £800 · Reconditioned from £2,125 · Common codes: N52B30, N53B30, B48B20
From £800
Tested, bare/short engine
From £2,125
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 6 Series 630i Replacement Engineto Finding the Best BMW 6 Series 630i Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryBMW 6 Series 630i - Engine History & Specs at a Glance
The BMW 630i has been the entry-level petrol model across three generations of the 6 Series, offering accessible straight-six and, later, turbocharged four-cylinder power. From the naturally aspirated N52 of the E63/E64 through to the efficient B48 of the G32 Gran Turismo, the 630i badge has always represented the sweet spot between performance and economy in BMW's grand tourer range.
Variant HistoryBMW 6 Series 630i - Engine History & Specs at a Glance
The BMW 630i has been the entry-level petrol model across three generations of the 6 Series, offering accessible straight-six and, later, turbocharged four-cylinder power. From the naturally aspirated N52 of the E63/E64 through to the efficient B48 of the G32 Gran Turismo, the 630i badge has always represented the sweet spot between performance and economy in BMW's grand tourer range.
BMW 6 Series 630i
Fuel TypePetrol (all generations)
Engine Size Range2.0L-3.0L
Power Output Range258-272hp across the variant's historyEngine History Timeline
**2003** - E63/E64 630Ci launched with N52B30 3.0-litre naturally aspirated straight-six 258hp, 300Nm torque
**2007** - E63/E64 facelift introduces N53B30 3.0-litre direct-injection straight-six 272hp, replacing the N52 in markets with low-sulphur fuel
**2011** - F12/F13 6 Series launched - 630i not offered in the UK market; replaced by 640i (N55 3.0L turbo straight-six 320hp)
**2017** - G32 6 Series Gran Turismo launched with B48B20 2.0-litre turbocharged four-cylinder 258hp, 400Nm, paired with 8-speed automatic
**2023** - G32 6 Series Gran Turismo production ends
Key Specs Snapshot
Fuel TypePetrol (all generations)Engine Size Range2.0L-3.0LPower Output Range258-272hp across the variant's historyYears Produced2003-2023 (with gap 2011-2017 for UK market)Every engine fitted to the BMW 6 Series 630i is covered below, with UK rebuilt pricing and known failure points.
BMW 6 Series 630i Engine Codes - Specifications & Replacement CostBMW 6 Series 630i Engine Codes - Specifications & Replacement Cost
3.0L Naturally Aspirated Straight-Six Petrol (2003-2007)
Power Output258hp (190kW) at 6,600rpmYears Fitted2003-2007 (E63/E64 630Ci)
Compatible Trim Levels
- 630Ci
- 630Ci SE
- 630Ci Sport
- 630Ci M Sport
Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£800-£1,800
Reconditioned
Addressed known issues, tested
£2,125-£3,500
Rebuilt
Full teardown, upgraded internals
£3,500-£4,500
Common Failure
The N52's electric water pump is a well-documented failure point, typically failing between 60,000-100,000 miles. Valve cover gaskets become brittle and leak oil over time. Timing chain issues are rare but not unheard of on higher-mileage examples.
The BMW 630i's engines vary dramatically by generation - the N52 is generally considered the most dependable choice in the E63/E64 lineup, while the N53 suffers from high-pressure fuel pump failures, and the B48 is a modern, efficient unit with fewer issues. Rebuilt 630i engines through EnginesMarket include upgraded components addressing the original failure points, plus a minimum 12-month unlimited-mileage warranty.
Why the BMW 6 Series E63/E64 630i Overheats
Affected Vehicles
BMW 6 Series E63/E64 630Ci (N52B30, 2003-2007)
Typical Failure Mileage
60,000-100,000 miles
Root Cause
The N52's electric water pump is a known weak point. Unlike belt-driven pumps, the electric unit can fail without warning, leading to rapid overheating and potential head gasket or cylinder head damage.
Why It Happens
The N52's electric water pump is a known weak point. Unlike belt-driven pumps, the electric unit can fail without warning, leading to rapid overheating and potential head gasket or cylinder head damage.
Dealer (parts + labour)
£800-£1,200
Specialist (parts + labour)
£500-£800
What it involves
New water pump, coolant flush
Suitability
Preventative - recommended at 60k-80k miles
1 - 2 daysDealer (parts + labour)
£2,500-£4,000
Specialist (parts + labour)
£1,500-£2,800
What it involves
Head removal, skim/test, new gasket
Suitability
Only if caught early and damage is minor
1 - 2 daysDealer (parts + labour)
£6,500-£9,000
Specialist (parts + labour)
£3,500-£4,500
What it involves
Supply & fit, upgraded components, 12-month warranty
Suitability
When overheating has caused catastrophic 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 |
|---|---|---|---|---|---|
 Electric water pump replacement Minor | £800-£1,200 | £500-£800 | New water pump, coolant flush | Preventative - recommended at 60k-80k miles | 1 - 2 days |
 Cylinder head repair (warped/cracked) Best Value | £2,500-£4,000 | £1,500-£2,800 | Head removal, skim/test, new gasket | Only if caught early and damage is minor | 1 - 2 days |
Full Replacement - rebuilt/reconditioned engine Best Value | £6,500-£9,000 | £3,500-£4,500 | Supply & fit, upgraded components, 12-month warranty | When overheating has caused catastrophic damage | 1 - 2 days |
Vehicle Value Check
Vehicle Value Check
A typical E63/E64 630i (2003-2010) is worth roughly £3,000-£8,000 depending on condition and mileage. If you're facing a full rebuilt engine at £3,500-£4,500 plus fitting, the replacement cost may approach 50-60% of a lower-value example's market value. For well-maintained, low-mileage examples, the maths is more favourable.
Our Recommendation
Our Recommendation
Preventative water pump replacement is significantly cheaper than dealing with the aftermath of an overheat. If your E63/E64 630i's cooling system hasn't been refreshed, consider replacing the water pump and thermostat proactively. If the car has overheated, have the cylinder head inspected immediately - catching a minor warp early can save the engine.
Don't Let Engine Failure Write Off Your BMW 6 Series 630i
The BMW 630i has been a cornerstone of the 6 Series range across three generations - from the classic E63/E64 grand tourer to the modern G32 Gran Turismo. Whether you're facing N52 water pump failure, N53 HPFP issues, or B48 timing chain concerns, EnginesMarket connects you with UK specialists who understand these engines inside out. Every rebuilt 630i engine comes with upgraded components addressing the original failure points, a minimum 12-month warranty, and nationwide delivery options.
Compare rebuilt N52B30 BMW 6 Series 630i 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 6 Series 630i. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier."
BMW 6 Series 630i Engine ReplacementFrequently Asked Questions
Question 1How much does a BMW 6 Series 630i engine replacement cost in the UK-
A rebuilt engine for a BMW 630i typically costs £3,500-£5,500 supply-only depending on the generation and engine code. Used units start from £800, reconditioned from £2,125. Fitting adds approximately 10-14 hours of labour at specialist rates.
- **Used engine:** £800-£2,800 - budget option, variable condition
- **Reconditioned:** £2,125-£4,200 - bench-tested and wear parts replaced
- **Rebuilt:** £3,500-£5,500 - full strip and rebuild with warranty
Question 2What are the signs of water pump failure in a BMW E63/E64 630i-
The N52 engine in the E63/E64 630i (2003-2007) is prone to electric water pump failure. Warning signs include the engine temperature gauge rising into the red zone, the cabin heater blowing cold air, and the cooling fan running at full speed continuously.
- Temperature gauge rising rapidly
- Heater blowing cold air at idle
- Cooling fan running at maximum speed
- Check engine light or coolant warning
Question 3Is it worth replacing the engine in a BMW E63/E64 630i-
The E63/E64 630i (2003-2010) is a modern classic with a loyal following. A well-maintained example is worth £3,000-£8,000 - if the car is solid and the replacement cost (£3,500-£5,500) makes financial sense, many owners choose to invest.
- E63/E64 6 Series values are supported by grand tourer enthusiast demand
- A rebuilt N52B30 or N53B30 with warranty can outlast the original
- Evaluate scrap value first if the car has significant other issues
Question 4How long does a BMW 630i engine replacement take-
A typical BMW 630i engine replacement takes 2-3 days for a specialist workshop, including removal, fitting, and testing. Supply-only delivery is usually 1-3 working days.
- Most UK specialists can complete the job within a week
- Complexity varies by generation - N52/N53 straight-six is well-understood; B48 requires more specialist knowledge
- Always confirm turnaround with your chosen supplier
Question 5What's the difference between the BMW 630i engines across generations-
The 630i badge has covered three main engine variants: the N52B30 3.0-litre naturally aspirated straight-six with 258hp (E63/E64 630Ci, 2003-2007), the N53B30 3.0-litre direct-injection straight-six with 272hp (E63/E64 630i, 2007-2010), and the B48B20 2.0-litre turbocharged four-cylinder with 258hp (G32 630i, 2017-2023).
- **E63/E64 (2003-2007):** N52B30 - 3.0L naturally aspirated, 258hp
- **E63/E64 (2007-2010):** N53B30 - 3.0L direct-injection, 272hp
- **G32 (2017-2023):** B48B20 - 2.0L turbocharged four-cylinder, 258hp
Question 6What warranty comes with a BMW 630i replacement engine-
Every rebuilt or reconditioned BMW 630i engine supplied through EnginesMarket carries a minimum 12-month unlimited-mileage warranty. Some suppliers offer extended coverage on premium rebuilds.
- 12 months is the minimum - many specialists offer 24 months
- Supply-only and supply & fit both carry warranty
- Always confirm exact terms with your chosen supplier
Why Choose UsCompare BMW 6 Series 630iEngine PricesToday
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Comparing BMW 6 Series 630i engine quotes is free and carries no obligation. Whether you need a used N52B30 for your E63 classic, a rebuilt N53 for your E64 convertible, a B48 for your G32 Gran Turismo, or anything in between, EnginesMarket connects you with vetted UK specialists who know the 630i inside out. Enter your registration above and get tailored quotes for your exact 630i and engine code today.
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