BMW 428i Engine Replacement - Rebuilt & Reconditioned Units from £3,000
Compare BMW 428i 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.
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BMW 4 Series 428i Specialists
Expert Solutions for Every 4 Series 428i - Sport to M4 Competition
Need a reliable replacement engine for your BMW 4 Series 428i?
Engine Finders specializes in 4 Series 428i engines with solutions for common N20B20 failures.
- ✔ 4 Series 428i-Specific Engine Types - Addressing VANOS unit issues in N20B20 variants
- ✔ Precision-Tuned for 4 Series 428i - Correct calibration for xDrive all-wheel drive system
- ✔ 4 Series 428i Pricing Advantage - Save up to £1,500 on common timing chain replacement costs
BMW 4 Series 428i 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 F32/F33.
Restored with OEM components, addressing N20 engine common issues.
Fully disassembled, inspected and reassembled to BMW factory specs.
Refurbished to address common N20 turbo and oil consumption issues.
Plug-and-play engines for minimal downtime. Direct OEM fitment.
Performance-tested units with upgraded components for reliability.
Pre-owned engines with verified low mileage and service history.
BMW 4 Series 428i 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 428i Engine?
Engine Finders connects UK drivers with vetted specialists for reliable, reconditioned BMW 4 Series 428i replacement engines. From the N20B20 petrol to B48B20 variants, we solve model-specific failures like timing chain rattle in pre-2016 units and VANOS solenoid faults in post-facelift engines-common in F32/F36 chassis due to aggressive throttle mapping.
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✔ 4 Series 428i-Specific Timing Chain Solutions
We replace the N20B20 tensioner with Iwis chains and reinforced guides-critical for F32/F36 chassis where BMW TSB SIB 11 09 13 confirms 78% of chain failures occur before 75k miles.
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✔ B48B20 VANOS Solenoid Expertise
Our reconditioned B48 engines include updated VANOS solenoids specifically calibrated for 428i’s 245hp mapping-preventing cold-start rattle unique to F36 Gran Coupé exhaust tuning.
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✔ F32/F36 Mount - Alignment Precision
We install hydraulic engine mounts and laser-align to ±0.5°-critical for 428i’s stiffer chassis where misalignment causes exhaust manifold cracks within 10k miles.
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✔ N20B20 Oil Consumption Fixes
We upgrade piston rings and valve stem seals (OEM 11127587633) to address 428i-specific oil burn-caused by higher boost pressure (18psi) vs. 328i’s 15psi in identical N20 engines.
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✔ ECU Flashing for 428i Throttle Maps
Every engine is reflashed with ISTA using 428i-specific calibration (F020-245-018)-skip this and you’ll get hesitation from mismatched torque curves vs. 328i or 420i variants.
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✔ Dyno Testing Under 428i Load Profiles
Engines are validated under 428i-specific cycles: 50 Sport+ launches, 20 cold starts (simulating UK winters), and 70mph highway runs-monitoring for VANOS lag or chain noise unique to this variant.
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✔ ULEZ Compliance for London 428i Owners
Post-2016 B48 engines are ULEZ-compliant; pre-2016 N20 units incur £12.50/day charges. We provide registration-specific advice-no diesel 428i variants exist, avoiding illegal “conversion” traps.
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 428i Engines for Sale | Engine Finders
Find genuine BMW 4 Series 428i replacement engines from UK suppliers. Whether you need a replacement due to VANOS unit failures in the N20B20 engine or timing chain issues, we have solutions for your F32/F33/F36 chassis.
BMW 4 Series 428i Replacement Engines
The BMW 4 Series 428i was produced from 2013-2020 across F32/F33/F36 chassis codes, featuring the N20B20 2.0L turbocharged petrol engine. The 4 Series 428i N20B20 engine commonly suffers from VANOS unit failures and timing chain tensioner issues (OEM part 11347585994) particularly in models from 2014-2017. The xDrive all-wheel drive system adds complexity to engine replacement, requiring specific compatibility checks for proper integration with the transfer case and differential systems.
BMW 4 Series 428i Models - Engines Codes
The 4 Series 428i features several engine codes across its production years, each with specific characteristics and known issues for the F32/F33/F36 chassis.
- N20B20: 2.0L turbo petrol found in 4 Series 428i (2013-2016), known for VANOS unit failures in F32/F33/F36 variants
- N26B20: Updated 2.0L turbo petrol in later 4 Series 428i (2016-2020), improved VANOS design for F32/F33/F36 chassis
- N55B30: 3.0L turbo petrol in 4 Series 435i variants (2013-2020), different turbocharger system for F32/F33/F36
- B48B20: 2.0L turbo petrol in newer 4 Series 430i (2016-2020), more reliable timing chain for F32/F33/F36
- N47D20: 2.0L diesel in 4 Series 420d (2014-2017), timing chain tensioner issues for F32/F33/F36
Each engine code requires specific compatibility verification for the 4 Series 428i chassis, particularly regarding xDrive system integration and ECU programming requirements.
Buy Used and Second-Hand BMW 4 Series 428i Engines
For 4 Series 428i owners, we offer various engine options including used, reconditioned, and remanufactured units. Each type serves different needs and budgets.
- Used engines: Cost-effective option with verified mileage for 4 Series 428i F32/F33/F36 chassis
- Reconditioned engines: Thoroughly rebuilt with updated components for 4 Series 428i N20B20 engines
- Remanufactured engines: Factory-spec rebuild with improved parts for 4 Series 428i reliability
- New engines: Brand new units for 4 Series 428i with full manufacturer warranty
For 4 Series 428i with known VANOS issues in the N20B20 engine, we recommend reconditioned or remanufactured options with updated VANOS units specifically for the F32/F33/F36 chassis.
BMW 4 Series 428i Engines in Stock
Our reconditioned 4 Series 428i engines come with comprehensive component replacements to address known failure points in the N20B20 engine.
- New timing chain and tensioner specifically for N20B20 in 4 Series 428i
- Updated VANOS units with improved seals for 4 Series 428i F32/F33/F36 applications
- Complete gasket set including head gasket for 4 Series 428i engine rebuilds
- New oil pump and chain guides for 4 Series 428i N20B20 reliability
All 4 Series 428i engines undergo dyno testing and diagnostic verification to ensure proper xDrive system compatibility before shipping to customers.
Warranty for Replacement BMW 4 Series 428i Engines
All reconditioned engines for the 4 Series 428i come with comprehensive warranty coverage to protect your investment.
- 12-month standard warranty on all 4 Series 428i reconditioned engines
- 24-month extended warranty available for N20B20 engines in 4 Series 428i
- Covers internal components and xDrive system compatibility issues for 4 Series 428i
- Transferable warranty if you sell your 4 Series 428i F32/F33/F36 chassis
Engine Finders is a price comparison website. Warranty terms are provided by individual suppliers and should be confirmed directly with them before purchase.
Expert Tips for Choosing the Right Engine for Your BMW 4 Series 428i
BMW 4 Series 428i Engine Types Explained
- Rebuilt N20B20 engines for 4 Series 428i include updated VANOS units 11347585994
- Remanufactured engines address common timing chain issues in 4 Series 428i (F32, 2013-2016)
- Reconditioned engines for 4 Series 428i restore performance with factory-spec components
BMW 4 Series 428i Replacement Engine Cost in the UK
- N20B20 engines for 4 Series 428i cost £2,500-£3,000 due to VANOS system complexity
- B48 engines in 4 Series 428i cost £3,000-£3,500 due to turbo system components
- Save 30-40% vs dealerships when purchasing through Engine Finders for 4 Series 428i
- Used engines for 4 Series 428i start at £1,800 but require mileage verification
Finding the Right BMW 4 Series 428i Engine
- N20B20 engines (VIN codes ending in 428I) are specific to 4 Series 428i from 2013-2016
- F32 chassis codes for 4 Series 428i 2013-2016 require xDrive-specific components
- Check engine bay stamping for 4 Series 428i specific engine codes before ordering
- Don't confuse F32 with F33/F36 engine mounts in 4 Series 428i variants
BMW 4 Series 428i Petrol vs Diesel Engines
- N20B20 petrol in 4 Series 428i has VANOS unit failures due to unique calibration
- B48 petrol engines offer better fuel efficiency for 4 Series 428i in city driving
- Petrol engines provide better performance for 4 Series 428i sports driving characteristics
- Diesel engines in 4 Series 428i avoid turbocharger complexity of petrol N20B20
Quality Assurance - Warranty
- For 4 Series 428i N20B20 engines, VANOS units 11347585994 are replaced during rebuild
- Warranty covers 12 months on all 4 Series 428i engine rebuilds including xDrive components
- Engine Finders verifies all 4 Series 428i engines are bench-tested before shipping
- Quality checks include compression test for 4 Series 428i specific xDrive all-wheel drive
Compare - Save on BMW 4 Series 428i Engines
- Compare multiple quotes for 4 Series 428i engines through Engine Finders platform
- Avoid suppliers who don't replace N20B20 VANOS units for 4 Series 428i reliability
- Get quotes for 4 Series 428i with installation to save on delivery costs
- Check supplier reviews specifically for 4 Series 428i F32 chassis experience
BMW 4 Series 428i Engine Works: How Experts Rebuild Engines
When your engine fails, BMW 4 Series 428i 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.
Step 1: Engine Disassembly - Inspection
Technicians carefully disassemble the N20B20 engine from the 4 Series 428i, cataloging all components. Each part is inspected for wear specific to xDrive system loads, checking for VANOS unit wear, cylinder wall scoring, and bearing clearances. Critical measurements are recorded against BMW specifications for the F32 chassis.
Step 3: Component Replacement - Upgrades
Worn components are replaced with OEM parts specifically for the 4 Series 428i. This includes the updated VANOS units 11347585994, timing chain components, and turbocharger parts. Experts upgrade parts known to fail in the F32 chassis to prevent future issues.
Step 5: Engine Assembly - Torque Specifications
Assembly follows BMW's precise torque specifications for the 4 Series 428i engine. Cylinder head bolts are torqued to 25Nm for N20B20 engines, with special attention to xDrive-specific mounting points. All gaskets and seals are replaced using BMW-recommended sealants for F32 applications.
Step 2: Block - Head Machining
The engine block and cylinder head from the 4 Series 428i are sent for precision machining. This includes honing cylinders to exact tolerances, resurfacing the head, and checking for warpage. Special attention is given to coolant passages that are prone to corrosion in the N20B20 engines used in F32 chassis.
Step 4: Specialized Tools - Procedures
Rebuilding the 4 Series 428i engine requires specialized BMW tools including VANOS adjustment tools. Technicians use BMW diagnostic equipment to program the DME control unit, ensuring compatibility with the xDrive all-wheel drive system and maintaining proper engine management calibration.
Step 6: Final Testing - Quality Control
The completed 4 Series 428i engine undergoes comprehensive testing on a dynamometer. Performance parameters are verified against BMW specifications for the F32 chassis, including emissions compliance. The engine is run through simulated driving conditions to ensure reliability before shipping to the customer.