BMW Z4 sDrive20I Engine Replacement - Rebuilt & Reconditioned Units from £3,495
Compare BMW Z4 sDrive20I 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 Z4 sDrive20i Specialists
Expert Solutions for Every Z4 sDrive20i - Standard Trim to M Sport Variant
Need a reliable replacement engine for your BMW Z4 sDrive20i?
Engine Finders specializes in Z4 sDrive20i engines powered by the B48 2.0L turbo, tackling common issues like timing chain stretch and high-pressure fuel pump failures.
- ✔ Z4 sDrive20i-Specific Engine Types - Solutions for B48 turbocharger reliability issues
- ✔ Precision-Tuned for Z4 sDrive20i - Optimized calibration for direct-injection systems
- ✔ Z4 sDrive20i Pricing Advantage - Save up to £700 on common timing chain replacements
BMW Z4 sDrive20i 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 G29 chassis (2019-present).
N20/B48 rebuilds with new timing chain kits & seals.
Factory-spec rebuilds replacing injectors, pumps, and pistons.
Tested units with replaced gaskets and updated VANOS parts.
Direct OEM swap B48 engines for minimal installation time.
Cleaned, dyno-tested units addressing oil consumption faults.
Verified mileage B48 units with full service history records.
BMW Z4 sDrive20i 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 Z4 sDrive20i Engine?
Engine Finders connects UK drivers with vetted specialists for reliable, reconditioned BMW Z4 sDrive20i replacement engines. From the B48B20A petrol engine to its specific tuning variations, we address model-specific failures like timing chain guide wear and coolant system issues unique to the Z4 sDrive20i's sportier configuration. Whether you need a replacement due to specific VANOS solenoid failures in the B48B20A Z4 sDrive20i or high-pressure fuel pump issues, Engine Finders makes it easy to locate the right engine, fast.
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✔ Z4 sDrive20i-Specific Timing Chain Solutions
We address the B48B20A's timing chain guide wear pattern specific to Z4 sDrive20i (2019-2023) with reinforced guides (OEM 11318657835) and upgraded tensioners that combat the increased stress from the Z4's sportier driving profile.
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✔ Z4-Specific Coolant System Expertise
Our reconditioned engines include updated thermostat housings (OEM 11537586936) and coolant transfer pipes specifically designed to prevent the premature failures common in the Z4 sDrive20i's tightly packaged engine bay.
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✔ VANOS System Optimization for Z4
We install upgraded VANOS solenoids (OEM 11368616010) with improved filtration to address the specific oil pressure sensitivity issues that affect the B48B20A in Z4 sDrive20i models during high-RPM driving.
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✔ High-Pressure Fuel Pump Solutions
Our replacement engines include the latest revision HPFP (OEM 13538643594) that addresses the specific fuel pressure drop issues experienced in Z4 sDrive20i models under hard acceleration.
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✔ Z4-Specific Engine Mount Upgrades
We use reinforced engine mounts (OEM 22116852631) designed to handle the additional stress from the Z4 sDrive20i's sportier chassis dynamics, preventing premature mount failure and vibration issues.
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✔ Charge Air Cooling System Enhancements
Our specialists address the specific charge air cooler pipe leakage issues in Z4 sDrive20i with upgraded clamping systems and reinforced pipes that withstand the higher boost pressures.
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✔ Z4-Specific Oil Management Solutions
We install upgraded oil separator systems (OEM 11157632431) designed to handle the higher G-forces and oil surge issues specific to the Z4 sDrive20i's sports car dynamics and lower stance.
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 Z4 sDrive20i Engines for Sale | Engine Finders
Engine Finders specializes in connecting UK Z4 sDrive20i owners with expert suppliers for reliable replacement engines. Whether you need a replacement due to specific timing chain guide wear in the B48B20A engine or coolant system failures unique to the Z4's sportier configuration, we provide access to quality engines that address the exact issues affecting your roadster.
BMW Z4 sDrive20i Replacement Engines
The Z4 sDrive20i (G29 chassis, 2019-present) exclusively uses the B48B20A 2.0L turbocharged petrol engine, producing 197hp with specific tuning for the roadster's sportier dynamics. Unlike other BMW models using the B48 engine, the Z4 sDrive20i variant experiences unique stress patterns due to its lower stance and higher cornering forces, leading to specific failure points. Common issues include timing chain guide wear exacerbated by oil surge during hard cornering, coolant transfer pipe failures from engine bay heat concentration, and VANOS solenoid sensitivity to oil pressure fluctuations. The B48B20A in the Z4 sDrive20i also features different engine management calibration than sedan variants, affecting long-term reliability in specific components.
BMW Z4 sDrive20i Models & Engines Codes
The Z4 sDrive20i utilizes specific engine codes with unique configurations for the roadster platform:
- B48B20A (2019-present): 2.0L turbocharged petrol engine producing 197hp. Specific to G29 chassis Z4 sDrive20i with reinforced engine mounts and modified oil management system for sports car dynamics. Known for timing chain guide wear (OEM 11318657835) and coolant transfer pipe issues under hard driving conditions.
- B48B20M1 (Special Edition 2021+): Performance-tuned variant with upgraded cooling system and reinforced timing components. Features revised VANOS solenoids (OEM 11368616010) to address oil pressure sensitivity during high-RPM operation.
Unlike other BMW models using B48 engines, the Z4 sDrive20i variants feature sport-specific calibration that affects long-term reliability patterns, particularly in the cooling and lubrication systems.
Buy Used and Second-Hand BMW Z4 sDrive20i Engines
For Z4 sDrive20i owners, we recommend specific engine types based on common failure patterns:
- Reconditioned: Ideal for B48B20A engines addressing timing chain guide wear and coolant system upgrades
- Remanufactured: Recommended for high-mileage Z4 sDrive20i models with comprehensive VANOS and fuel system updates
- Low-mileage Used: Suitable for newer G29 models where specific Z4 components remain in good condition
Each engine undergoes specific testing for Z4 sDrive20i applications, including oil pressure stability under cornering simulation and cooling system integrity checks.
BMW Z4 sDrive20i Engines in Stock
Our specialist suppliers maintain comprehensive stock of Z4 sDrive20i-specific engines with upgrades addressing common failure points:
- Reinforced timing chain guides (OEM 11318657835) for B48B20A engines
- Upgraded coolant transfer pipes with improved heat resistance
- Latest revision VANOS solenoids (OEM 11368616010) for improved oil pressure stability
- Sport-tuned engine mounts (OEM 22116852631) for reduced vibration
- High-flow oil pump upgrades for cornering oil pressure maintenance
All engines undergo dynamic testing simulating Z4 sDrive20i driving conditions, including high-G cornering oil pressure tests and thermal cycling for cooling system integrity.
Warranty for Replacement BMW Z4 sDrive20i Engines
Our suppliers provide comprehensive warranty coverage specifically tailored to Z4 sDrive20i engine characteristics:
- 24-month warranty on reconditioned B48B20A engines with upgraded timing components
- 36-month coverage for remanufactured engines including VANOS and cooling system updates
- Roadster-specific coverage addressing sports driving patterns and thermal stress
- Nationwide network of BMW specialists for warranty claims and support
Engine Finders acts as a connection service between customers and specialist suppliers. All warranties are provided directly by the supplying garage and may have specific terms regarding sports use and track driving.
Expert Tips for Choosing the Right Engine for Your BMW Z4 sDrive20i
BMW Z4 sDrive20i Engine Types Explained
- Used N20B20A units (28k-45k miles) ideal for budget swaps
- Recon engines get new timing chain & B46-spec turbo
- Rebuilt short-blocks upgraded with 2019+ piston ring set
- Petrol-only: no diesel variant ever fitted to Z4 sDrive20i
BMW Z4 sDrive20i Replacement Engine Cost in the UK
- Good used: £1,595-£1,995 (inc. 6-mth warranty)
- Recon with new turbo: £2,795-£3,195 (12-mth cover)
- Full rebuild: £3,495-£3,995 (24-mth, unlimited miles)
- Save up to 55% vs BMW dealer list prices on Z4 sDrive20i units
Finding the Right BMW Z4 sDrive20i Engine
- Check VIN pos. 4-7 = "UF91" to confirm G29 chassis
- Engine no. prefix 140N20C for 2018-on B46 update
- 8HP45 transmission code must match (different from 30i)
- Post-2020 cars need EU6d-temp emission hardware
BMW Z4 sDrive20i Petrol vs Diesel Engines
- sDrive20i is petrol-only; diesel never offered on G29
- N20B20A delivers 184 hp & 270 Nm from 1,250 rpm
- WLTP combined 40.9 mpg vs 30i’s 38.2 mpg
- ULEZ compliant; no AdBlue system to worry about
Quality Assurance & Warranty
- Compression test ≥ 11 bar across all four cylinders
- New OEM timing chain kit 113186 337 48 fitted as std
- B46 engines get revised crankshaft sprocket (112886 089 41)
- 12-month unlimited-mileage warranty; extendable to 24
Compare & Save on BMW Z4 sDrive20i Engines
- Exchange your old N20 unit for £250 core refund
- Bundle supply & fit at 150+ UK garages - save £300
- 0% finance available on recon & rebuilt options
- Price-match guarantee for genuine like-for-like quotes
BMW Z4 sDrive20i Engine Works: How Experts Rebuild Engines
When your engine fails, BMW Z4 sDrive20i 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. Ultrasonic clean & crack-test: N20B20A block is tanked, mag-fluxed and measured; bores must be within 0.02 mm for G29 spec.
2. Machine work: Deck surface skimmed 0.05 mm, main-line honed with BMW tool 8330 4 340 060 to restore bearing clearances.
3. Timing assembly: New OEM chain, guides 113186 337 48 and updated tensioner 113186 337 49 to cure cold-start rattle.
4. Turbo & injection: Garrett MGT1444LZ rebuilt, high-pressure pump 135175 869 21 re-sealed; injectors coded to ECU.
5. Short-block assembly: Mahle pistons with revised 2019 ring pack, 140 Nm rod bolts torqued with calibrated BMW angle gauge.
6. Live-mapping & sign-off: Engine run on dyno to 6,500 rpm; boost, knock and AFR logged before release to customer.