Engines Market

BMW 630i SPECIALISTS

BMW 6 Series 630i Engine Replacement Compare 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.

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BMW 6 Series 630i Engine
from£2,125 to £5,500
  • Usedfrom £800
  • Reconditionedfrom £2,125
  • Common codesN52B30, N53B30, B48B20
BMW 6-series 630i Used Engine — N52B30BMW 6-seriesUsed Engine — N52B30BMW 6-series 630i Reconditioned Engine — N52B30BMW 6-seriesReconditioned Engine — N52B30BMW 6-series 630i Rebuilt Engine — N52B30BMW 6-seriesRebuilt Engine — N52B30

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How it works

3 Simple Steps to Finding the Right Replacement Engine

Clear information first, then the right engine and specialist for your exact vehicle.

Variant History

BMW 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
  1. 2003

    E63/E64 630Ci launched with N52B30 3.0-litre naturally aspirated straight-six, 258hp, 300Nm torque

  2. 2007

    E63/E64 facelift introduces N53B30 3.0-litre direct-injection straight-six, 272hp, replacing the N52 in markets with low-sulphur fuel

  3. 2011

    F12/F13 6 Series launched - 630i not offered in the UK market; replaced by 640i (N55 3.0L turbo straight-six, 320hp)

  4. 2017

    G32 6 Series Gran Turismo launched with B48B20 2.0-litre turbocharged four-cylinder, 258hp, 400Nm, paired with 8-speed automatic

  5. 2023

    G32 6 Series Gran Turismo production ends

Every engine fitted to the BMW 6 Series 630i is covered below, with UK rebuilt pricing and known failure points.

Engine Codes & Pricing

BMW 6 Series 630i Engine Codes Specifications & Replacement Cost

Find your exact engine code, specs and UK replacement cost guide.

N52B30 — 3.0L Naturally Aspirated Straight-Six Petrol (2003-2007) engine

N52B30 — 3.0L Naturally Aspirated Straight-Six Petrol (2003-2007)

Power Output
258hp (190kW) at 6,600rpm
Years Fitted
2003-2007 (E63/E64 630Ci)

Can’t find your exact engine code?-> Get quotes for N52B30 BMW 6 Series 630i engine replacement

-> Get quotes for N52B30 BMW 6 Series 630i engine replacement

Common Problems

BMW 6 Series 630i Engine Problems Repair Cost vs Replacement

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.

Common failure points and repair options

N52 Electric Water Pump Failure

Affected
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.

Repair options

Repair tierDealer priceSpecialist price
Electric water pump replacement£800-£1,200£500-£800
Cylinder head repair (warped/cracked)£2,500-£4,000£1,500-£2,800
Full Replacement - rebuilt/reconditioned engine£6,500-£9,000£3,500-£4,500
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.
-> Compare rebuilt N52B30 BMW 6 Series 630i engine prices

N53 High-Pressure Fuel Pump Failure

Affected
BMW 6 Series E63/E64 630i (N53B30, 2007-2010)
Typical failure mileage
40,000-100,000 miles (can fail at any mileage)
Root cause
The N53's high-pressure fuel pump is the most notorious failure point on this engine. Symptoms include rough idling, stalling, a noticeable drop in power, and an "Engine fault! Reduced power" warning. Many early failures were replaced under recall, but later failures remain common.

Repair options

Repair tierDealer priceSpecialist price
High-pressure fuel pump replacement£1,500-£2,500£900-£1,500
Injector replacement£1,200-£2,000£800-£1,200
Full Replacement - rebuilt/reconditioned engine£7,000-£10,000£4,000-£5,500
Our recommendation
HPFP failure on the N53 is well-documented and often strikes without warning. If you experience rough idling or power loss, have the fuel system diagnosed promptly. Catching a failing HPFP early can prevent damage to the catalytic converter and other components. For cars with high mileage or multiple issues, a fully rebuilt engine with upgraded components and warranty offers the best value.
-> Compare rebuilt N53B30 BMW 6 Series 630i engine prices

B48 Timing Chain Tensioner Wear

Affected
BMW 6 Series G32 630i (B48B20, 2017-2023)
Typical failure mileage
60,000-100,000 miles (pre-2018 models most at risk)
Root cause
The B48 engine, while more reliable than its N20 predecessor, can suffer from timing chain tensioner wear, particularly on pre-2018 models. A rattling noise on startup lasting more than three seconds is the primary warning sign.

Repair options

Repair tierDealer priceSpecialist price
Timing chain tensioner replacement£800-£1,500£500-£900
Full timing chain replacement£2,500-£4,000£1,500-£2,500
Full Replacement - rebuilt/reconditioned engine£7,000-£10,000£4,200-£5,500
Our recommendation
If your G32 630i's B48 engine makes a rattling noise on startup lasting more than three seconds, have the timing chain tensioner inspected immediately. Catching it early can save the engine. For pre-2018 models, consider preventative tensioner replacement as a cost-effective insurance policy against catastrophic failure.
-> Compare rebuilt B48B20 BMW 6 Series 630i engine prices

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.

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FAQ

BMW 6 Series 630i Engine ReplacementFrequently Asked Questions

Everything BMW 6 Series 630i owners usually ask before choosing a rebuilt, reconditioned or used replacement engine.

Why Choose Us

Compare BMW 6 Series 630i Engine Prices Today

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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