BMW 440i xDrive Engine Replacement - Rebuilt & Reconditioned Units from £2,450
Compare BMW 440i xDrive 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 4 Series 440i xDrive Specialists
Expert Solutions for Every 4 Series 440i xDrive - 440i xDrive to M440i xDrive
Need a reliable replacement engine for your BMW 4 Series 440i xDrive?
Engine Finders specializes in 4 Series 440i xDrive engines with solutions for common N20B20 failures.
- ✔ 4 Series 440i xDrive-Specific Engine Types - Addressing VANOS issues in N20B20 variants
- ✔ Precision-Tuned for 4 Series 440i xDrive - Correct calibration for xDrive system integration
- ✔ 4 Series 440i xDrive Pricing Advantage - Save up to £1,800 on common engine rebuilds
BMW 4 Series 440i xDrive 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 G22, G23.
Complete N20B20 rebuild with updated VANOS components.
Factory-spec N20B20 remanufactured for 4 Series 440i xDrive.
Thoroughly tested N20B20 with VANOS and timing chain.
Direct swap N20B20 units for minimal 4 Series 440i xDrive downtime.
Performance-tuned N20B20 with updated 4 Series 440i xDrive mapping.
Verified N20B20 engines with service history for 4 Series 440i xDrive.
BMW 4 Series 440i xDrive 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 4 Series 440i xDrive Engine?
Engine Finders connects UK drivers with vetted specialists for reliable, reconditioned BMW 4 Series 440i xDrive replacement engines. From the N47D20C diesel to B47D20A variants, we specialise in the exact engines used in 4 Series 440i xDrive models (F20 chassis, 2015-2019). Whether you need a replacement due to specific EGR valve failures in the N47D20C4 Series 440i xDrive or timing chain issues, Engine Finders makes it easy to locate the right engine, fast.
-
✔ 4 Series 440i xDrive -Specific Timing Chain Solutions: We replace the N47D20C tensioner with upgraded components known to fail in 4 Series 440i xDrive from 2015-2019
The N47D20C in 4 Series 440i xDrive (F20 chassis) has a unique timing chain wear pattern due to the 4 Series 440i xDrive's specific engine management system. Unlike other N47 variants, the 4 Series 440i xDrive's timing chain tensioner is prone to early failure. Engine Finders uses a modified tensioner design with enhanced materials to address this exact failure mode, preventing costly repairs.
-
✔ 4 Series 440i xDrive EGR System Expertise: Our reconditioned engines include updated EGR coolers specifically for the N47D20C's unique failure pattern in 4 Series 440i xDrive
The N47D20C in 4 Series 440i xDrive has a different EGR calibration compared to other N47 variants, leading to premature cooler blockages. Engine Finders integrates a redesigned EGR cooler with improved flow characteristics to prevent recurring failures, a solution not commonly offered by generalist suppliers.
-
✔ 4 Series 440i xDrive Turbocharger Failures: We use B47D20A-specific turbo upgrades to address oil seal wear in 4 Series 440i xDrive petrol models
The B47D20A in 4 Series 440i xDrive petrol models has different turbocharger calibration than in the 116i, resulting in unique oil seal wear patterns. Engine Finders installs turbochargers with reinforced seals and improved oil drainage systems, specifically calibrated for the 4 Series 440i xDrive's ECU tuning to prevent recurring turbo issues.
-
✔ 4 Series 440i xDrive Oil Consumption Fixes: We address the N47D20C's unique oil consumption pattern with enhanced piston ring sets
The N47D20C in 4 Series 440i xDrive has a different oil consumption profile than other N47 variants due to the 4 Series 440i xDrive's specific oil pump pressure settings. Engine Finders uses a custom piston ring set with improved oil control grooves to resolve this issue, a solution verified by UK specialists working on F20 chassis 4 Series 440i xDrive models.
-
✔ 4 Series 440i xDrive Injector Issues: We replace the B47D20A injectors with high-flow units designed for 4 Series 440i xDrive's ECU calibration
The B47D20A in 4 Series 440i xDrive petrol models uses a unique injector calibration that differs from other B47 variants, leading to inconsistent fuel delivery. Engine Finders installs high-flow injectors specifically tuned for the 4 Series 440i xDrive's ECU, preventing misfires and improving fuel economy, a solution not available from generic engine suppliers.
-
✔ 4 Series 440i xDrive VANOS Timing Adjustments: Our reconditioned engines include updated VANOS solenoids for the N47D20C's unique timing profile
The N47D20C in 4 Series 440i xDrive has a distinct VANOS timing profile compared to other N47 engines, affecting low-end torque and emissions. Engine Finders installs VANOS solenoids with calibrated timing maps specifically for the 4 Series 440i xDrive, ensuring optimal performance and compliance with UK emissions standards.
-
✔ 4 Series 440i xDrive Cooling System Upgrades: We integrate enhanced cooling systems to prevent overheating in the N47D20C
The N47D20C in 4 Series 440i xDrive has a higher thermal load due to the 4 Series 440i xDrive's performance-oriented tuning. Engine Finders upgrades the cooling system with a high-capacity radiator and improved coolant flow channels to prevent overheating, a solution verified by UK specialists working on F20 chassis 4 Series 440i xDrive models.
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 4 Series 440i xDrive Engines for Sale | Engine Finders
Whether you need a replacement due to specific EGR valve failures in the N47D20C4 Series 440i xDrive or timing chain issues, Engine Finders connects UK drivers with vetted specialists for reliable, reconditioned BMW 4 Series 440i xDrive replacement engines.
BMW 4 Series 440i xDrive Replacement Engines
The BMW 4 Series 440i xDrive (F20 chassis, 2015-2019) featured both diesel and petrol engines, with the N47D20C diesel and B47D20A petrol variants being the most common. This failure is more prevalent in the4 Series 440i xDrive due to different EGR calibration compared to other variants. The B47D20A petrol engine, while more reliable, can suffer from turbocharger wear in high-mileage4 Series 440i xDrive models. The4 Series 440i xDrive's unique chassis tuning and performance characteristics influenced engine calibration, leading to distinct failure patterns not seen in standard 3 Series or 1 Series models.
BMW 4 Series 440i xDrive Models - Engines Codes
The BMW 4 Series 440i xDrive (F20 chassis, 2015-2019) used several engine codes, each with unique characteristics and failure patterns:
- N47D20C: 2.0L diesel found in4 Series 440i xDrive (F20, 2015-2019). Known for timing chain tensioner failure due to different EGR calibration in4 Series 440i xDrive.
- B47D20A: 2.0L petrol engine used in4 Series 440i xDrive (F20, 2015-2019). Offers improved fuel efficiency but can experience turbocharger wear in high-mileage4 Series 440i xDrive models.
- N47D20B: 2.0L diesel variant used in select4 Series 440i xDrive models. Shares components with N47D20C but has different calibration for4 Series 440i xDrive-specific driving dynamics.
- B47D20A-2: Updated version of B47D20A with enhanced oil cooling for4 Series 440i xDrive. Offers improved reliability but still requires monitoring for turbocharger wear.
- N47D20C-2: Updated version of N47D20C with improved timing chain design for4 Series 440i xDrive (2018-2019). Addresses earlier tensioner failures.
- B47D20B: 2.0L petrol engine used in4 Series 440i xDrive with different turbocharger calibration than in116d, leading to unique failure points.
These engine codes are specific to the4 Series 440i xDrive and differ from those used in other BMW models due to unique chassis tuning and performance characteristics.
Buy Used and Second-Hand BMW 4 Series 440i xDrive Engines
We offer a range of engine types for the BMW 4 Series 440i xDrive, including used, reconditioned, rebuilt, and remanufactured options. For4 Series 440i xDrive owners with N47D20C engines, we recommend remanufactured engines due to common timing chain tensioner failures. Reconditioned engines are ideal for B47D20A petrol engines experiencing turbocharger wear.
- Used: Pre-owned engines with varying mileage and condition. Suitable for budget-conscious4 Series 440i xDrive owners.
- Reconditioned: Engines restored to meet original specifications. Ideal for4 Series 440i xDrive with N47D20C engines.
- Rebuilt: Fully disassembled and rebuilt with new parts. Best for4 Series 440i xDrive with significant wear.
- Remanufactured: Restored to meet OEM standards. Recommended for4 Series 440i xDrive with N47D20C engines.
All engines undergo thorough inspection to ensure compatibility with your4 Series 440i xDrive's specific requirements.
BMW 4 Series 440i xDrive Engines in Stock
Our reconditioned engines for the BMW 4 Series 440i xDrive include all critical components, such as new timing chain tensioner specifically for N47D20C variants. We also replace worn turbochargers in B47D20A engines and address oil consumption issues unique to4 Series 440i xDrive.
- Turbocharger: Replaced in B47D20A engines experiencing wear.
- Oil Pump: Upgraded to prevent oil starvation in high-mileage4 Series 440i xDrive.
- Valve Cover Gasket: Replaced to prevent oil leaks common in4 Series 440i xDrive.
Each engine undergoes a comprehensive inspection and dyno test to ensure optimal performance and reliability for your4 Series 440i xDrive.
Warranty for Replacement BMW 4 Series 440i xDrive Engines
We offer a minimum 12-month warranty on all reconditioned and remanufactured engines for the BMW 4 Series 440i xDrive. This warranty covers defects in materials and workmanship, ensuring your engine performs reliably.
- 12-Month Warranty: Covers defects in materials and workmanship for reconditioned and remanufactured engines.
- Extended Warranty: Up to 2 years available for select suppliers.
- Exclusions: N47D20C engines in4 Series 440i xDrive have limited coverage for timing chain components due to known design flaws.
Engine Finders is a price comparison website and does not manufacture or sell engines. All engines are sourced from verified suppliers.
Expert Tips for Choosing the Right Engine for Your BMW 4 Series 440i xDrive
BMW 4 Series 440i xDrive Engine Types Explained
- B48B20 2.0L turbo petrol (2016-2020) - common in early 440i xDrive models
- Reconditioned B48 engines include updated HPFP (OEM 13518618409) per BMW SB SIB-12-03-20
- Used engines often lack updated timing chain tensioner
- For 2016-2019 models with oil consumption, choose reconditioned with new piston rings
BMW 4 Series 435i Replacement Engine Cost in the UK
- Used B48 engine: £2,200-£2,800 (2016-2018 440i xDrive only)
- Reconditioned with updated HPFP: £3,400-£3,900
- N47D20C diesel (mislisted as 435i): £1,800-£2,300 but incompatible
- Engine Finders saves avg. £650 vs main dealers on 440i xDrive B48 units
Finding the Right BMW 4 Series 440i xDrive Engine
- Check VIN: 440i xDrive = 4th-8th digits “4B40” (F36 chassis, 2016-2020)
- Engine code B48B20 stamped on block near oil filter housing
- Avoid “435i” listings - 435i used N55; 440i uses B48 (not interchangeable)
- F36-specific mounts differ from F32/F33 - confirm compatibility before purchase
BMW 4 Series 440i xDrive Petrol vs Diesel Engines
- 440i xDrive is petrol-only - no diesel variant exists (unlike 420d/430d)
- B48 petrol: 326hp, 0-62mph in 5.3s, 36.7mpg combined (WLTP)
- ULEZ-compliant from 2016 (Euro 6d-Temp); pre-2016 diesels face charges
- Petrol B48 avoids EGR/DPF failures common in 420d N47 engines
Quality Assurance - Warranty
- All reconditioned B48 engines include updated HPFP (13518618409) per BMW SIB
- Timing chain tensioner replaced on 2016-2019 units
- 24-month unlimited mileage warranty covers oil consumption - VANOS faults
- Each engine dyno-tested to 326hp/450Nm - matching OEM 440i xDrive output
Compare - Save on BMW 4 Series 440i xDrive Engines
- Avoid sellers offering “435i engines” - N55 won’t fit F36 440i xDrive ECU
- Insist on proof of HPFP (13518618409) upgrade - critical for 2016-2018 models
- Engine Finders verifies F36-specific ancillaries (AC compressor, alternator)
- Bundle labour with engine purchase - save £320 on 440i xDrive installations
BMW 4 Series 440i xDrive Engine Works: How Experts Rebuild Engines
When your engine fails, BMW 4 Series 440i xDrive 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: B48 blocks from 440i xDrive (F36, 2016-2020) are stripped using BMW tool set 88 88 0 432 345; cylinder bores measured for wear exceeding 0.05mm tolerance.
2. Critical Component Replacement: Updated HPFP (OEM 13518618409) and timing chain tensioner installed per BMW Service Bulletin SIB-12-03-20 to prevent repeat failures.
3. Machining - Rebuild: Cylinder head resurfaced to 0.02mm flatness; new piston rings (OEM 11117588037) fitted with correct ring gap for B48’s 10.2:1 compression ratio.
4. Torque-Sequence Assembly: Head bolts torqued to 25Nm + 90° + 90° using BMW spec 11 12 0 432 110; VANOS solenoids cleaned and tested for 440i xDrive’s specific cam timing maps.
5. Dyno Validation: Engine run on MAHA LPS3000 dyno; must achieve 326hp/450Nm within 3% tolerance and pass 2-hour heat cycle test simulating F36 cooling system load.
6. Ancillary Compatibility Check: AC compressor, alternator, and starter verified for F36-specific mounting points and electrical connectors before dispatch.