BMW 640i xDrive Convertible Engine Replacement - Rebuilt & Reconditioned Units from £3,882
Compare BMW 640i xDrive Convertible replacement engine prices from trusted UK suppliers. Rebuilt and reconditioned units come with a 12-month unlimited-mileage warranty and full OEM-spec testing. Save up to 60% versus a main dealer quote.
Enter Your Vehicle Registration To
Find Best Supplier Near You
Search your Engine Manually
BMW 6 Series 640i xDrive Convertible Specialists
Expert Solutions for Every 6 Series 640i xDrive Convertible -640i xDrive Convertible to 650i xDrive Convertible
Need a reliable replacement engine for your BMW 6 Series 640i xDrive Convertible ?
Engine Finders specializes in6 Series 640i xDrive Convertible engines with solutions for common N55 twin-turbo failures.
- ✔6 Series 640i xDrive Convertible -Specific Engine Types - Addressing N55 twin-turbo issues in E64 variants
- ✔ Precision-Tuned for6 Series 640i xDrive Convertible - Correct calibration for xDrive-specific AWD systems
- ✔6 Series 640i xDrive Convertible Pricing Advantage - Save up to £X on common turbocharger repairs
BMW 6 Series 640i xDrive Convertible Replacement Engines Options - Verified Units (UK Supply)
All engines bench-tested, VAT-inclusive, with 12-month warranty. MoT-compliant. Nationwide delivery. Direct OEM fitment for E64.
Complete N55 engine rebuilds with upgraded components for6 Series 640i xDrive Convertible reliability.
Factory-standard N55 rebuilds with enhanced cooling for xDrive convertible-specific heat management.
Thoroughly inspected N55 engines with verified performance for6 Series 640i xDrive Convertible .
Direct swap N55 engines for6 Series 640i xDrive Convertible with minimal installation time.
Performance-tuned N55 units with enhanced reliability for6 Series 640i xDrive Convertible .
Verified low-mileage N55 engines with full6 Series 640i xDrive Convertible history documentation.
BMW 6 Series 640i xDrive Convertible Compatible Engine Codes - Average Prices on Rebuilt Units
All engines professionally reconditioned, bench-tested, and supplied with 12-month warranty. Direct OEM fitment. VAT-inclusive. Nationwide UK delivery.
Why Choose Engine Finders for Your BMW 6 Series 640i xDrive Convertible Engine?
Engine Finders connects UK drivers with vetted specialists for reliable, reconditioned BMW 6 Series 640i xDrive Convertible replacement engines. From the N55 petrol variants to addressing specific twin-turbo failures, we provide solutions specifically for your E64 chassis. Whether you need a replacement due to specific twin-turbo issues in the N556 Series 640i xDrive Convertible or cooling system failures, Engine Finders makes it easy to locate the right engine, fast.
-
✔6 Series 640i xDrive Convertible -Specific Twin-Turbo Solutions: We address the N55 turbocharger failures with upgraded seals known to fail in6 Series 640i xDrive Convertible from 2010-2018
Our reconditioned N55 engines for 6 Series 640i xDrive Convertible include enhanced turbocharger components specifically designed to handle the convertible's heat cycles and xDrive power demands.
-
✔ Convertible-Specific Cooling System Upgrades: Enhanced cooling components for N55 in6 Series 640i xDrive Convertible to handle convertible heat management
The6 Series 640i xDrive Convertible cooling system faces additional stress due to convertible operation and xDrive AWD demands, requiring specific component upgrades during engine replacement.
-
✔ xDrive Transmission Compatibility: Proper ECU calibration for6 Series 640i xDrive Convertible AWD system integration
Our6 Series 640i xDrive Convertible engines include correct xDrive-specific ECU programming to ensure seamless integration with the all-wheel drive system and differential management.
-
✔ E64 Chassis Integration: Direct fitment verification for6 Series 640i xDrive Convertible engine bay dimensions
Every 6 Series 640i xDrive Convertible engine is verified for E64 chassis compatibility, ensuring proper mounting points, exhaust routing, and convertible-specific component clearances.
-
✔ Convertible-Specific Stress Testing: N55 engines bench-tested for6 Series 640i xDrive Convertible heat cycle durability
Our6 Series 640i xDrive Convertible engines undergo specific testing protocols simulating convertible operation and xDrive power distribution to ensure long-term reliability.
-
✔ ULEZ Compliant N55 Engines: Clean petrol engines for6 Series 640i xDrive Convertible in London congestion zones
All6 Series 640i xDrive Convertible N55 engines meet current emissions standards, helping owners avoid congestion charges and ensuring MoT compliance for convertible operation.
-
✔ Local Supplier Matching: Connect with nearby specialists for6 Series 640i xDrive Convertible engine delivery and fitting
Our platform matches6 Series 640i xDrive Convertible owners with local suppliers, reducing delivery costs and ensuring technicians familiar with E64 convertible-specific requirements.
Rated 4.9 out of 5 by 1081 satisfied customers who chose reconditioned and used BMW engines through Engine Finders.
Based on real post-sale feedback from buyers matched with verified UK suppliers.
BMW 6 Series 640i xDrive Convertible Engines for Sale | Engine Finders
Whether you're facing premature turbo failure in the N55B30 engine or high-pressure fuel pump issues specific to the 640i xDrive Convertible, Engine Finders connects you with UK suppliers offering verified replacement engines tailored to your F12/F13 chassis.
BMW 6 Series 640i xDrive Convertible Replacement Engines
The 640i xDrive Convertible (F12/F13, 2011-2018) exclusively used the N55B30 3.0L turbocharged inline-six petrol engine, producing 320 hp. Unlike the 640d’s N57 diesel, the 640i xDrive’s N55 is prone to specific failure points: high-pressure fuel pump (HPFP) collapse (OEM 13517599934), wastegate rattle in the twin-scroll turbo (OEM 11657598432), and valve cover gasket leaks exacerbated by the convertible’s underbonnet heat retention. BMW Service Bulletin SIB 11 03 12 addressed HPFP failures, while SIB 11 10 13 covered turbo wastegate diagnostics. These issues are more prevalent in UK-market 640i xDrive Convertibles due to stop-start driving patterns and thermal cycling from the retractable roof mechanism.
BMW 6 Series 640i xDrive Convertible Models - Engines Codes
All 640i xDrive Convertibles share the same engine code but exhibit model-specific wear due to chassis dynamics and climate exposure:
- N55B30: 3.0L turbocharged petrol (320 hp) used exclusively in 640i xDrive Convertible (F12/F13, 2011-2018). Known for HPFP failure (OEM 13517599934) and turbo wastegate rattle (OEM 11657598432), worsened by the convertible’s frequent thermal expansion cycles.
- N55B30TU: Minor 2013+ update with revised HPFP internals, but still susceptible to premature wear in UK stop-start conditions.
- N55B30 (xDrive-specific): Features unique oil cooler routing and reinforced engine mounts to handle AWD torque distribution-failure to replicate these in replacements causes drivetrain misalignment.
- N55B30 (Convertible-spec): Includes additional heat shielding absent in coupé variants; missing this in donor engines leads to accelerated gasket degradation.
Unlike the 5 Series 640i, the 640i xDrive Convertible’s engine bay layout requires specific ancillary positioning due to the folding roof mechanism’s hydraulic pump proximity.
Buy Used and Second-Hand BMW 6 Series 640i xDrive Convertible Engines
For the 640i xDrive Convertible, we categorize engines by their risk profile:
- Used engines: Sourced from low-mileage F12/F13 donors with verified HPFP and turbo health reports.
- Reconditioned engines: N55B30 units rebuilt with upgraded HPFP (Siemens VDO 0 261 500 107) and reinforced wastegate arms to address known failure points.
- Rebuilt engines: Include replacement of all N55-specific wear items: valve cover gasket (OEM 11127589708), oil filter housing gasket, and VANOS solenoids calibrated for xDrive torque curves.
Every 640i xDrive Convertible engine undergoes compression testing and HPFP pressure validation before listing-critical due to the model’s high incidence of hidden fuel system wear.
BMW 6 Series 640i xDrive Convertible Engines in Stock
Our reconditioned 640i xDrive Convertible engines include model-specific upgrades to prevent repeat failures:
- High-pressure fuel pump (Siemens VDO 0 261 500 107) with 2-year lifespan guarantee
- Turbocharger with reinforced wastegate linkage (OEM-spec 11657598432)
- Valve cover gasket with enhanced heat-resistant silicone (OEM 11127589708)
- xDrive-specific engine mounts (OEM 11127592987) pre-installed
Each engine is dyno-tested to 320 hp under load and validated for HPFP pressure stability (50-200 bar range) per BMW ISTA standards for F12/F13 chassis.
Warranty for Replacement BMW 6 Series 640i xDrive Convertible Engines
All reconditioned 640i xDrive Convertible engines include a 12-month warranty covering mechanical failure, with extended 24-month options available.
- Covers HPFP, turbocharger, and internal engine components
- Excludes damage from improper installation or pre-existing vehicle faults (e.g., faulty fuel quality sensors)
- Requires professional installation with xDrive-specific torque calibration
Engine Finders is a price comparison service. Warranty terms are set by individual suppliers-always confirm coverage specifics before purchase.
Expert Tips for Choosing the Right Engine for Your BMW 6 Series 640i xDrive Convertible
BMW 6 Series 640i xDrive Convertible Engine Types Explained
- For 6 Series 640i xDrive Convertible S63B44T, reconditioned units with upgraded turbos recommended
- Used 6 Series 640i xDrive Convertible engines from F12 chassis (2011-2017) offer savings but check service history
- New engines for 6 Series 640i xDrive Convertible S63B44T cost 40% more due to twin-turbo complexity
- Reconditioned 6 Series 640i xDrive Convertible engines include upgraded VANOS for S63B44T
BMW 6 Series 640i xDrive Convertible Replacement Engine Cost in the UK
- S63B44T twin-turbo engines for 6 Series 640i xDrive Convertible £5,500-£6,800 reconditioned
- S63B44T0 engines for 6 Series 640i xDrive Convertible £5,750 reconditioned due to enhanced cooling
- Engine Finders saves 6 Series 640i xDrive Convertible owners £1,200-£1,800 vs local garages
- Warranty options for 6 Series 640i xDrive Convertible engines range 12 months to 2 years
Finding the Right BMW 6 Series 640i xDrive Convertible Engine
- Check VIN to confirm S63B44T engine code for your 6 Series 640i xDrive Convertible F12
- Verify ECU compatibility for 6 Series 640i xDrive Convertible F12 chassis (2011-2017) with xDrive
- Confirm engine bay fitment for 6 Series 640i xDrive Convertible with specific mounting points
- Request service records for used 6 Series 640i xDrive Convertible engines to verify maintenance
BMW 6 Series 640i xDrive Convertible Petrol vs Diesel Engines
- 6 Series 640i xDrive Convertible petrol S63B44T offers high-performance V8 experience
- 6 Series 640i xDrive Convertible S63B44T provides 407bhp twin-turbo power delivery
- No diesel option available for 6 Series 640i xDrive Convertible (petrol only)
- Petrol 6 Series 640i xDrive Convertible engines avoid ULEZ charges but higher fuel costs
Quality Assurance - Warranty
- 6 Series 640i xDrive Convertible engines tested for compression, emissions, and turbo function
- For S63B44T, turbos replaced during 6 Series 640i xDrive Convertible rebuilds
- Warranty covers 6 Series 640i xDrive Convertible engine internals but excludes oil leaks after 12m
- Quality check includes VANOS operation for 6 Series 640i xDrive Convertible S63B44T engines
Compare - Save on BMW 6 Series 640i xDrive Convertible Engines
- Compare 6 Series 640i xDrive Convertible engine quotes from 450+ suppliers via Engine Finders
- Choose suppliers who replace S63B44T turbos for 6 Series 640i xDrive Convertible
- Request detailed breakdown for 6 Series 640i xDrive Convertible engine quotes to avoid hidden costs
- Consider reconditioned 6 Series 640i xDrive Convertible engines with warranty to save £1,500+ vs new
BMW 6 Series 640i xDrive Convertible Engine Works: How Experts Rebuild Engines
When your engine fails, BMW 6 Series 640i xDrive Convertible engine works can restore performance at a fraction of the cost of a brand-new engine. From diagnostics to rebuild, here's how experts ensure optimal results.
1. Disassembly - Inspection: Experts carefully dismantle the S63B44T engine from your 6 Series 640i xDrive Convertible, cataloging all components and inspecting for wear patterns specific to this model. Critical checks include turbos, VANOS units, and charge air cooling.
2. Component Cleaning - Assessment: All parts from your 6 Series 640i xDrive Convertible engine undergo thorough cleaning and assessment. Specialists use specialized equipment to test compression, check for cracks in the block, and evaluate the twin-turbo system.
3. Part Replacement - Upgrades: Worn components in the 6 Series 640i xDrive Convertible engine are replaced with OEM parts. For S63B44T engines, this includes turbos and upgraded VANOS units to address known failure points.
4. Machining - Boring: Engine blocks for the 6 Series 640i xDrive Convertible undergo precision machining to restore proper tolerances. Cylinder walls are honed to factory specifications, ensuring optimal performance for S63B44T engines.
5. Reassembly with Torque Specs: The 6 Series 640i xDrive Convertible engine is reassembled using BMW-specific torque specifications. Critical bolts like cylinder head bolts are torqued to BMW specifications, and special tools ensure proper VANOS alignment.
6. Testing - Quality Control: Completed 6 Series 640i xDrive Convertible engines undergo rigorous testing including emissions checks, leak tests, and performance verification. The engine is run on test beds to ensure proper operation before shipping.