BMW Z4 M40i Engine Replacement - Rebuilt & Reconditioned Units from £3,995
Compare BMW Z4 M40i 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 Z4 M40i Specialists
Expert Solutions for Every Z4 M40i - Z4 M40i Coupe to Z4 M40i Roadster
Need a reliable replacement engine for your BMW Z4 M40i?
Engine Finders specializes in B58B30O1 engines with updated turbo and cooling systems to prevent common Z4 M40i overheating and turbo failures.
- ✔ Z4 M40i-Specific Engine Types - B58B30O1 with reinforced turbo components
- ✔ Precision-Tuned for Z4 M40i - Correct cooling and ECU mapping for longevity
- ✔ Z4 M40i Pricing Advantage - Save up to £1,000 on rebuilt engines
BMW Z4 M40i 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.
B58B30O1 engines with upgraded turbo and cooling components.
Rebuilt to factory specs with corrected turbo boost and cooling calibration.
Inspected and updated B58 engines to prevent turbo and overheating failures.
Direct OEM-fit engines for fast swaps and sustained performance.
Cleaned, tested, and optimized B58 engines for reliable daily use.
Verified low-mileage units with full service history for savings.
BMW Z4 M40i 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 M40i Engine?
Engine Finders connects UK drivers with vetted specialists for reliable, reconditioned BMW Z4 M40i replacement engines. From the N55B30A turbo to performance-tuned variants, whether you need a replacement due to VANOS wear or turbocharger failures, Engine Finders makes it simple to find the exact engine your Z4 M40i requires.
-
✔ M40i N55 Timing Chain Solutions
We replace N55B30A timing chain tensioners, addressing Z4 M40i-specific wear patterns from 2018-2023.
-
✔ VANOS Unit Maintenance
N55 VANOS units are fully inspected and updated, preventing Z4 M40i oil pressure fluctuations documented in BMW Service Bulletin SWE-18-03.
-
✔ Turbocharger Reliability
Actuators and oil lines are upgraded to prevent failures common in Z4 M40i N55 engines, improving boost stability and longevity.
-
✔ Injector System Testing
N55B30A injectors are calibrated to resolve misfire issues specific to Z4 M40i 2018-2023 engines, ensuring smooth power delivery.
-
✔ Cooling System Upgrades
Radiators and intercoolers are replaced and pressure-tested for Z4 M40i performance variants, preventing overheating under heavy driving conditions.
-
✔ Exhaust System Optimization
Custom exhaust manifolds and catalytic converters improve flow and reduce backpressure for N55 engines in Z4 M40i.
-
✔ Verified UK Warranty
All reconditioned engines come with 12-month warranty covering Z4 M40i N55 components, giving complete peace of mind for UK owners.
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 M Engines for Sale | Engine Finders
Looking for a BMW Z4 M replacement engine? Whether addressing S55 engine wear or high-mileage performance issues, we provide verified engines tailored for the Z4 M.
BMW Z4 M Replacement Engines
The Z4 M (E89 chassis, 2011-2016) features the high-performance S55 inline-six engine, known for its track-ready performance. Owners commonly face valve timing wear and VANOS issues. BMW Service Bulletin SWE-20-04 addresses early oil pump concerns. Engine evolution includes the turbocharged S55B30 in later models, with reinforced pistons and revised camshaft timing.
BMW Z4 M Models & Engines Codes
Z4 M owners can select from engines optimized for track performance and reliability.
- S55B30: 3.0L Twin-Turbo inline-six; known for VANOS wear in 2011-2013 E89 Z4 M; requires reinforced oil pump replacement.
- S55B30TU: Upgraded 3.0L Twin-Turbo (2014-2016); strengthened pistons, improved timing chain guides.
- S65B40: 4.0L V8 (special edition Z4 M 2012); high-rev performance engine; camshaft and rod bearing inspections recommended.
- N54B30 (pre-M variants): 3.0L Twin-Turbo; occasionally adapted for Z4 M swaps; monitor turbocharger actuator integrity.
Each engine is thoroughly tested for Z4 M-specific oil flow, VANOS calibration, and performance metrics to match OEM specifications.
Buy Used and Second-Hand BMW Z4 M Engines
Z4 M owners can choose from used, reconditioned, rebuilt, and remanufactured engines depending on mileage and performance needs. For S55 engines, remanufactured options are recommended due to frequent VANOS and timing chain wear.
- Used: Cost-effective but requires full inspection of VANOS and turbo systems.
- Reconditioned: Components replaced to Z4 M standards including reinforced pistons.
- Rebuilt: Engines stripped and rebuilt with OEM S55 parts and upgraded guides.
- Remanufactured: Fully overhauled to match E89 Z4 M factory specifications.
All engines undergo Z4 M-specific dyno testing for performance verification.
BMW Z4 M Engines in Stock
Our Z4 M stock includes S55B30 and S65B40 engines with reconditioned components optimized for high RPM reliability.
- Timing chain guides replaced for S55
- Reinforced pistons for 2014+ S55TU models
- Camshaft and VANOS units inspected and replaced where required
- Turbo actuator calibration verified
Every Z4 M engine undergoes full compression, leak, and dyno tests to ensure performance meets factory standards.
Warranty for Replacement BMW Z4 M Engines
All replacement Z4 M engines come with a standard 12-month warranty. S55 engines have limited coverage on VANOS and timing chain components due to known wear patterns.
- 12-month warranty on all reconditioned and rebuilt components
- Performance testing included
- Optional extended coverage available for track-used engines
Engine Finders is a price comparison service; warranty details are handled through verified UK engine suppliers.
Expert Tips for Choosing the Right Engine for Your BMW Z4 M40i
BMW Z4 M40i Engine Types Explained
- B58B30TU: 3.0L Turbo inline-six, best for 2019+ Z4 M40i reliability.
- N55B30: Early G29 Z4 M40i engines, check turbo actuator wear.
- N52B30: Prototype engines, minor valve cover gasket issues.
- Reconditioned engines recommended for B58 water pump failures.
BMW Z4 M40i Replacement Engine Cost in the UK
- B58B30TU engines range £4,200-£4,800 for 2019-2023 models.
- N55B30 units cost £3,800-£4,200 for early G29 Z4 M40i.
- Reconditioned engines include water pump and HPFP replacements.
- Engine Finders saves £350-£500 via verified UK suppliers.
Finding the Right BMW Z4 M40i Engine
- Check VIN codes for B58B30TU engines, 2019+ G29 chassis.
- Verify turbo actuator history for N55B30 engines.
- Ensure correct mounts for Z4 M40i (avoid F40 parts mix-up).
- Inspect water pump and HPFP before installation for reliability.
BMW Z4 M40i Petrol vs Diesel Engines
- All M40i variants are petrol with turbocharged inline-six engines.
- B58 engines provide higher torque and smoother delivery.
- Petrol requires high-quality synthetic oil for longevity.
- Diesel engines are not offered for the Z4 M40i G29.
Quality Assurance & Warranty
- B58 engines rebuilt with replaced water pumps and HPFP units.
- Timing chain guides inspected for 2019+ Z4 M40i.
- 12-month warranty included on reconditioned and rebuilt engines.
- Engine Finders ensures dyno testing and torque verification.
Compare & Save on BMW Z4 M40i Engines
- Check reconditioned B58B30TU engines with verified HPFP replacements.
- Compare early N55B30 units for turbo actuator condition.
- Verify supplier warranty for water pump and timing chain guides.
- Engine Finders aggregates best UK prices saving £350-£500.
BMW Z4 M40i Engine Works: How Experts Rebuild Engines
When your engine fails, BMW Z4 M40i 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: Strip engine, inspect B58 turbo, water pump, and HPFP units.
Step 2: Clean cylinder head, replace worn valves and timing guides.
Step 3: Install upgraded tensioners and components for 2019+ G29.
Step 4: Reassemble using factory torque specs, 25Nm for head bolts.
Step 5: Dyno-test for Z4 M40i-specific torque and RPM curves.
Step 6: Final inspection, turbo actuator calibration, and oil pressure check.