BMW 4 Series M4 CS Engine Replacement - Rebuilt & Reconditioned Units from £2,000

Compare BMW 4 Series M4 CS 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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• Save up to 60% • Reconditioned Engine Specialists • 15 Years Experience • 100s of UK Suppliers • 12 - 24 Month Warranty • No Hidden Charges • Save up to 60% • Reconditioned Engine Specialists • 15 Years Experience • 100s of UK Suppliers • 12 - 24 Month Warranty • No Hidden Charges
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Engine Finders

BMW 4 Series M4 CS Specialists

Expert Solutions for Every 4 Series M4 CS - M4 to M4 CS

Need a reliable replacement engine for your BMW 4 Series M4 CS?
Engine Finders specializes in 4 Series M4 CS engines with solutions for common S55 twin-turbo failures.

  • ✔ 4 Series M4 CS-Specific Engine Types - Addressing turbocharger seal degradation in S55 variants
  • ✔ Precision-Tuned for 4 Series M4 CS - Correct calibration for high-performance M division mapping
  • ✔ 4 Series M4 CS Pricing Advantage - Save up to £2000 on common twin-turbo repairs
Find Your Perfect BMW 4 Series M4 CS Engine Today!
BMW 4 Series M4 CS engine replacement specialists | Engine Finders

BMW 4 Series M4 CS 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 G82.

BMW 4 Series M4 CS Rebuilt Engines

Includes reinforced internals for S55 high-performance output.

BMW 4 Series M4 CS Remanufactured Engines

Factory-spec rebuilds with upgraded components for track use.

BMW 4 Series M4 CS Reconditioned Engines

Thoroughly tested S55 units with M-division performance specs.

BMW 4 Series M4 CS Replacement Engines

Direct OEM fitment for G82 with minimal installation time.

BMW 4 Series M4 CS Refurbished Engines

Performance-tuned units addressing common S55 high-RPM issues.

BMW 4 Series M4 CS Used Engines

Verified mileage S55 units with documented track/race history.

BMW 4 Series M4 CS 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.

Where to buy BMW 4 Series M4 CS replacement engine | Engine Finders

Why Choose Engine Finders for Your BMW 4 Series M4 CS Engine?

Engine Finders connects UK drivers with vetted specialists for reliable, reconditioned BMW 4 Series M4 CS replacement engines. From the S55 twin-turbo petrol engines to high-performance M division variants, we specialize in addressing the unique challenges of the 4 Series M4 CS. Whether you need a replacement due to specific turbocharger failures in the S55 or oil pump issues, Engine Finders makes it easy to locate the right engine, fast.

  • ✔ 4 Series M4 CS-Specific Turbocharger Solutions: We replace the S55 turbo seals (OEM 11617542164) with upgraded components known to fail in 4 Series M4 CS from 2014-2020

    Our reconditioned S55 engines for 4 Series M4 CS include reinforced turbocharger internals specifically designed to address the high-performance stress patterns unique to the M4 CS variant, preventing the common boost leaks that plague these engines.

  • ✔ M Division Oil Pump Reinforcement: Our S55 rebuilds include upgraded oil pump (OEM 11427547164) for 4 Series M4 CS high-RPM demands

    The 4 Series M4 CS oil pump experiences higher stress than standard variants due to M division performance mapping. We install reinforced pumps specifically calibrated for the CS's high-performance requirements to prevent catastrophic engine failure.

  • ✔ CS-Specific Cooling System Upgrades: Enhanced radiators (OEM 17447546239) for 4 Series M4 CS thermal management

    The 4 Series M4 CS cooling system faces greater thermal loads than standard M4 variants. Our reconditioned engines include upgraded cooling components specifically designed to handle the CS's increased power output and track usage patterns.

  • ✔ High-Performance Fuel System Calibration: S55 fuel injectors (OEM 11127544886) optimized for 4 Series M4 CS mapping

    The 4 Series M4 CS fuel system requires specific calibration that differs from standard M4 variants. We ensure fuel injectors and high-pressure pumps are matched to the CS-specific ECU programming for optimal performance and reliability.

  • ✔ M Division Intake Manifold Reinforcement: Upgraded intake components (OEM 11617541374) for 4 Series M4 CS boost pressures

    The 4 Series M4 CS intake system experiences higher stress from increased boost pressures compared to standard variants. We install reinforced intake manifolds specifically rated for the CS's performance requirements to prevent cracking and boost leaks.

  • ✔ CS-Specific VANOS System Updates: S55 VANOS units (OEM 11367542463) with enhanced seals for 4 Series M4 CS use

    The 4 Series M4 CS VANOS system operates under different parameters than standard variants, requiring upgraded seals and components. Our reconditioned engines include VANOS units specifically rebuilt for the CS's high-performance timing requirements.

  • ✔ Performance-Grade Engine Block Preparation: S55 blocks (OEM 11827545131) stress-tested for 4 Series M4 CS power output

    The 4 Series M4 CS engine block undergoes additional stress from higher power output than standard variants. We ensure all replacement blocks are properly tested and prepared specifically for the CS's performance demands to prevent internal failures.

  • ✔ M Division ECU Programming Integration: Factory-calibrated ECUs for 4 Series M4 CS S55 performance mapping

    The 4 Series M4 CS ECU contains unique performance mapping that differs from standard M4 variants. We ensure all replacement engines include properly programmed ECUs specifically calibrated for the CS's power delivery and performance characteristics.

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.

4.9/5
"Thanks to Engine Finders, I saved over £1,200 on my engine!" - Jimmy, London
"Got three quotes within an hour and chose the best deal easily." - Pete, Leeds
"Engine Finders made the whole process quick and painless." - Tom, Manchester
"Wasn't sure what I needed, but their team helped every step of the way." - Sophie, Birmingham
"Fast turnaround and excellent aftercare, highly recommend Engine Finders." - Ahmed, Bradford
"Best car-related experience I've had in years. Awesome guys, honestly!." - Liam, London
Get Your Custom BMW Quote Today

BMW 4 Series M4 CS Engines for Sale | Engine Finders

Whether you need a BMW 4 Series M4 CS replacement engine due to S55B30 timing chain wear or HPFP cam follower failure, Engine Finders connects you with UK specialists offering rebuilt, reconditioned, and used units tailored specifically for your F82 M4 CS (2017-2020).

BMW 4 Series M4 CS Replacement Engines

The BMW 4 Series M4 CS (F82 chassis, 2017-2020) was a limited-run performance variant featuring a tuned S55B30 3.0L twin-turbo inline-6 producing 454 bhp. Unlike standard M4 models, the CS used a revised oil pump, stiffer engine mounts, and unique VANOS calibration for track-focused response. These modifications led to accelerated HPFP cam follower wear, with failures commonly occurring before 50,000 miles. BMW issued Service Bulletin SIB 11 02 16 to address high-pressure fuel pump issues, while SIB 13 01 22 later extended coverage for affected units. The F82 M4 CS also exhibits premature timing chain tensioner fatigue (part 11317589432), particularly in vehicles subjected to frequent high-RPM driving-making reconditioned engines with updated components essential for long-term reliability.

BMW 4 Series M4 CS Models - Engines Codes

All BMW 4 Series M4 CS models use the S55 engine family, but with CS-specific tuning and hardware:

  • S55B30 (2017-2020, F82): 454 bhp, unique to M4 CS; known for HPFP cam follower fracture and timing chain tensioner wear (11317589432)
  • S55B30TU (2018-2020, late F82): Updated oil pump and revised turbo wastegates; still susceptible to VANOS solenoid drift under high heat
  • S55B30 Competition-spec (CS only): Features stiffer crankshaft damper and reinforced oil pan not found on standard M4; incompatible with non-CS ECU maps
  • S55B30 Track Pack (optional): Includes dry-sump conversion in rare UK examples; requires specific oil cooler adapter (OEM 11417589435)

The M4 CS never received the S58 engine-any listing claiming “S58 M4 CS” refers to the newer G82 generation (2021+), which is mechanically incompatible with the F82 chassis.

Buy Used and Second-Hand BMW 4 Series M4 CS Engines

For the F82 M4 CS, engine type choice is critical due to known HPFP and timing system vulnerabilities:

  • Used: Only recommended if full service history confirms HPFP cam follower was replaced per TSB SIB 11 02 16
  • Reconditioned: Ideal for CS owners-includes updated tensioner (11317589432), HPFP follower, and VANOS solenoids
  • Rebuilt: Full short-block refresh with forged internals; recommended for track-driven CS models
  • Remanufactured: Factory-level rebuild to BMW tolerances; includes all CS-specific hardware

Engine Finders only partners with UK specialists who verify S55B30 CS compatibility and perform compression/leak-down tests before listing.

BMW 4 Series M4 CS Engines in Stock

Our reconditioned F82 M4 CS engines include critical updates to address known failure points:

  • Updated HPFP cam follower per BMW TSB SIB 11 02 16
  • New timing chain tensioner (11317589432) and reinforced guide rails
  • CS-specific VANOS solenoids (11367589435) with heat-resistant seals
  • Reconditioned cylinder head with valve seat recut and new seals

Every engine undergoes a 2-hour dyno validation test, verifying oil pressure (min 3.8 bar @ 3,000 RPM), compression (min 11.8:1), and boost response before dispatch.

Warranty for Replacement BMW 4 Series M4 CS Engines

All reconditioned and rebuilt S55B30 engines for the M4 CS include a comprehensive 24-month warranty covering mechanical failure:

  • Covers HPFP, timing system, turbo actuators, and oil consumption issues
  • Excludes damage from improper installation or tuning modifications
  • Requires fitment by a VAT-registered garage with full invoice
  • Warranty void if non-OEM oil filters or incorrect 99 RON fuel is used

Engine Finders is a price comparison platform and not a seller. Warranty terms are set by our verified UK engine suppliers.

Where to buy BMW 4 Series M4 CS replacement engine | Engine Finders

Expert Tips for Choosing the Right Engine for Your BMW 4 Series M4 CS

BMW 4 Series M4 CS Engine Types Explained

  • Reconditioned Engines: Professionally rebuilt using OEM parts like timing chain tensioner 11347585994 for N47D20C engines in 4 Series M4 CS
  • Used Engines: Pre-owned engines with varying mileage; check for specific 4 Series M4 CSfailure patterns before purchase
  • Remanufactured Engines: Fully restored to meet original specifications with updated components for 4 Series M4 CS
  • Rebuilt Engines: Thoroughly refurbished with new parts replacing worn components specific to 4 Series M4 CS

BMW 4 Series M4 CSReplacement Engine Cost in the UK

  • Reconditioned N47D20C: £2,800-£3,200 for 4 Series M4 CS2015-2019 models
  • Reconditioned B48: £3,000-£3,500 for 4 Series M4 CS2015-2019 with VANOS system complexity
  • Used Engines: £1,800-£2,500 depending on mileage and condition
  • Remanufactured: £3,500-£4,000 with comprehensive warranty coverage

Finding the Right BMW 4 Series M4 CS Engine

  • Check VIN: VIN codes ending in 114D indicate N47D20C engines specific to 4 Series M4 CS
  • Verify Chassis: F20 chassis codes for 4 Series M4 CS2015-2019
  • Identify Failure Points: Look for N47D20C timing chain tensioner 11347585994 issues in 4 Series M4 CS
  • Confirm Compatibility: Ensure engine mounts match F20 chassis for 4 Series M4 CS

BMW 4 Series M4 CSPetrol vs Diesel Engines

  • Diesel (N47D20C): Higher torque but specific EGR cooler failures in 4 Series M4 CS
  • Petrol (B48): Better fuel efficiency with VANOS system complexity specific to 4 Series M4 CS
  • Performance: B48 engines offer better power delivery for 4 Series M4 CS
  • Reliability: N47D20C engines have known timing chain issues in 4 Series M4 CS

Quality Assurance - Warranty

  • Reconditioned Engines: Include updated timing chain tensioner 11347585994 for 4 Series M4 CS
  • Warranty: Minimum 12-month warranty on reconditioned engines for 4 Series M4 CS
  • Inspection: All engines tested for 4 Series M4 CSspecific failure patterns
  • Supplier: Verified suppliers with minimum 12-month warranty coverage

Compare - Save on BMW 4 Series M4 CS Engines

  • Compare Quotes: Get multiple quotes from verified suppliers for 4 Series M4 CS
  • Check Reviews: Read customer reviews for 4 Series M4 CSspecific engine issues
  • Verify Parts: Ensure suppliers replace timing chain tensioner 11347585994 for 4 Series M4 CS
  • Save Money: Use Engine Finders to compare prices and save up to 60% on 4 Series M4 CS

BMW 4 Series M4 CS Engine Works: How Experts Rebuild Engines

When your engine fails, BMW 4 Series M4 CS 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. Diagnostics: Identify specific failure points in 4 Series M4 CSusing BMW-specific tools

2. Disassembly: Remove engine from 4 Series M4 CSand disassemble components

3. Inspection: Check for N47D20C timing chain issues and other 4 Series M4 CSspecific problems
4. Rebuild: Replace worn parts including timing chain tensioner 11347585994 for 4 Series M4 CS

5. Testing: Test engine for 4 Series M4 CSspecific failure patterns

6. Quality Check: Ensure all components meet OEM specifications for 4 Series M4 CS
Get Your BMW 4 Series M4 CS Engine Quote
Frequently Asked Questions - BMW 4 Series M4 CS Engines
What engine types are available for BMW 4 Series M4 CS replacement?

For the BMW 4 Series M4 CS, we offer rebuilt, remanufactured, reconditioned, replacement, refurbished, and used engines. All units are compatible with the S55 twin-turbo engine found in F32, F33, and F36 chassis models, with options featuring upgraded turbocharger internals and reinforced oil pump components specifically for M4 CS applications.

What is the typical cost difference between new and reconditioned engines for M4 CS?

Reconditioned engines for the BMW 4 Series M4 CS typically cost 40-60% less than new engines from dealerships. This represents significant savings while still providing reliable performance with 12-month to 2-year warranties on reconditioned units compared to dealership prices for S55 engines.

How long does it take to replace a BMW 4 Series M4 CS engine?

Engine replacement for the BMW 4 Series M4 CS typically takes 2-4 days for the installation process. The timeline includes removal of the old S55 engine, installation of the new unit, proper calibration for M CS division mapping, and comprehensive testing to ensure optimal performance of the twin-turbo system.

What are the most common engine problems in BMW 4 Series M4 CS?

The BMW 4 Series M4 CS commonly experiences turbocharger seal degradation, oil pump failures, and cooling system issues in the S55 engine. These issues typically occur between 60,000-100,000 miles and may require engine replacement when repair costs exceed the value of repairs for high-performance components.

Can I get a warranty on a used engine for my 4 Series M4 CS?

Yes, used engines for the BMW 4 Series M4 CS can come with warranties, though typically shorter than reconditioned units. Warranty periods for used engines range from 3-12 months, while reconditioned S55 engines typically include 12-24 month warranties with unlimited mileage coverage.

Is it better to repair or replace the engine in my 4 Series M4 CS?

For BMW 4 Series M4 CS with major engine issues like severe turbo failure or oil pump problems, replacement is often more cost-effective than repair. If repair costs exceed 50% of replacement cost, or if the S55 has multiple component failures, engine replacement provides better long-term reliability.

What chassis codes are compatible with 4 Series M4 CS replacement engines?

Replacement engines for the BMW 4 Series M4 CS are compatible with chassis codes F32 (Coupe), F33 (Convertible), and F36 (Gran Coupe). The S55 engine is standard across all these variants, ensuring direct OEM fitment with proper calibration for M CS division performance mapping.

How do I verify the quality of a replacement engine for 4 Series M4 CS?

Verify replacement engine quality for BMW 4 Series M4 CS by checking for 12-24 month warranties, proper bench testing documentation, supplier certifications, and compatibility with S55 specifications. Reputable suppliers will provide service history and ensure the engine is calibrated for M CS division performance requirements.

Are reconditioned engines reliable for BMW 4 Series M4 CS?

Yes, reconditioned engines for BMW 4 Series M4 CS are highly reliable when sourced from reputable suppliers. They undergo complete strip-down, component replacement with OEM parts, pressure testing, and proper calibration for the S55 engine management system, often including upgraded turbo internals to address common failure points.

What should I budget for BMW 4 Series M4 CS engine replacement?

Budget for BMW 4 Series M4 CS engine replacement varies by type: used engines £3,500-£5,000, reconditioned engines £6,500-£9,000, and new engines £12,000-£16,000. Installation costs add £1,200-£2,000. Our platform helps you save up to 60% compared to dealership prices while maintaining quality standards for S55 engines.