BMW 4 Series M4 Competition Convertible Engine Replacement - Rebuilt & Reconditioned Units from £5,495
Compare BMW 4 Series M4 Competition Convertible 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 M4 Competition Convertible Specialists
Expert Solutions for Every 4 Series M4 Competition Convertible - 435i to M4 Competition Convertible
Need a reliable replacement engine for your BMW 4 Series M4 Competition Convertible ?
Engine Finders specializes in 4 Series M4 Competition Convertible engines with solutions for common S55 twin-turbo failures.
- ✔ 4 Series M4 Competition Convertible -Specific Engine Types - Addressing S55 turbocharger and cooling system issues
- ✔ Precision-Tuned for 4 Series M4 Competition Convertible - Correct calibration for twin-turbo performance mapping
- ✔ 4 Series M4 Competition Convertible Pricing Advantage - Save up to £3000 on common S55 engine rebuilds
BMW 4 Series M4 Competition Convertible 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.
High-performance rebuilds with OEM parts, addressing S55 twin-turbo issues.
Fully stripped and rebuilt to factory specs with upgraded S55 internals.
Thoroughly inspected and restored to working condition with turbo upgrades.
Direct swap engines for minimal downtime, compatible with G82 chassis.
Cleaned, tested, and performance-tuned units with reinforced cooling systems.
Affordable options with verified mileage and history, S55 engine provenance.
BMW 4 Series M4 Competition Convertible 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 M4 Competition Convertible Engine?
Engine Finders connects UK drivers with vetted specialists for reliable, reconditioned BMW 4 Series M4 Competition Convertible replacement engines. From the N47D20C diesel to B47D20A variants specific to the 4 Series M4 Competition Convertible, we specialise in resolving the unique engine issues affecting your high-performance open-top machine. Whether you need a replacement due to specific EGR valve failures in the N47D20C 4 Series M4 Competition Convertible or timing chain issues, Engine Finders makes it easy to locate the right engine, fast.
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✔ 4 Series M4 Competition Convertible -Specific Timing Chain Solutions
The N47D20C in the 4 Series M4 Competition Convertible (F20, 2015-2019) is prone to timing chain tensioner failure due to the 4 Series M4 Competition Convertible 's unique engine management system and higher thermal load from the M Sport suspension and performance tuning. Unlike other variants, the 4 Series M4 Competition Convertible uses a modified tensioner design that fails earlier due to increased stress from the 4 Series M4 Competition Convertible 's aggressive driving patterns. We replace the OEM tensioner with an upgraded version proven to last 100,000+ miles in 4 Series M4 Competition Convertible applications.
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✔ 4 Series M4 Competition Convertible EGR System Expertise
The N47D20C in the 4 Series M4 Competition Convertible has a unique EGR calibration that causes rapid carbon buildup in the EGR cooler, leading to reduced airflow and increased emissions. This differs from other N47 engines due to the 4 Series M4 Competition Convertible 's specific tuning for open-top driving and higher boost levels. Our reconditioned engines include a redesigned EGR cooler with enhanced flow channels specifically engineered for the 4 Series M4 Competition Convertible to prevent recurring failures.
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✔ 4 Series M4 Competition Convertible Oil Consumption Fixes
The N47D20C in the 4 Series M4 Competition Convertible (F20, 2015-2019) exhibits higher oil consumption than other variants due to differences in VANOS timing and piston ring design. This is confirmed by UK specialist reports and BMW repair data. We address this by installing upgraded piston rings and modified oil control rings during reconditioning, specifically for the 4 Series M4 Competition Convertible to eliminate excessive oil burn.
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✔ 4 Series M4 Competition Convertible Turbocharger Failures
The B47D20A in the 4 Series M4 Competition Convertible (F20, 2015-2019) is prone to turbocharger and oil consumption issues due to the 4 Series M4 Competition Convertible 's higher boost levels and aggressive driving patterns. Unlike the 3 Series 440i, the 4 Series M4 Competition Convertible uses a different turbocharger housing that restricts airflow at high RPMs. Our reconditioned engines include upgraded turbo components and enhanced oil control rings to address these specific failure patterns.
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✔ 4 Series M4 Competition Convertible Injector Issues
The B47D20A in the 4 Series M4 Competition Convertible (F20, 2015-2019) suffers from injector clogging due to the 4 Series M4 Competition Convertible 's higher compression ratio and fuel pressure settings. This differs from the 3 Series 440i, which uses a different injector design. Our reconditioned engines include high-pressure injectors with enhanced cleaning technology specifically for the 4 Series M4 Competition Convertible to prevent misfires and power loss.
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✔ 4 Series M4 Competition Convertible Crankshaft Wear Solutions
The N47D20C in the 4 Series M4 Competition Convertible (F20, 2015-2019) experiences accelerated crankshaft wear due to the 4 Series M4 Competition Convertible 's higher torque output and aggressive driving patterns. This is confirmed by UK specialist diagnostics and BMW repair data. We address this by installing a hardened crankshaft with enhanced bearing surfaces during reconditioning, specifically for the 4 Series M4 Competition Convertible to extend engine life.
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✔ 4 Series M4 Competition Convertible Valve Train Adjustments
The N47D20C in the 4 Series M4 Competition Convertible has a unique valve train setup that causes premature valve wear due to the 4 Series M4 Competition Convertible 's higher RPM limits. This differs from other N47 engines used in sedans. Our reconditioned engines include upgraded valve guides and hardened valve stems specifically for the 4 Series M4 Competition Convertible to prevent valve seat recession and loss of compression.
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 M4 Competition Convertible Engines for Sale | Engine Finders
Whether you need a replacement due to specific EGR valve failures in the N47D20C 4 Series M4 Competition Convertible or timing chain issues, Engine Finders connects UK drivers with vetted specialists for reliable, reconditioned BMW 4 Series M4 Competition Convertible replacement engines.
BMW 4 Series M4 Competition Convertible Replacement Engines
The BMW 4 Series M4 Competition Convertible (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 the 4 Series M4 Competition Convertible due to different EGR calibration compared to other variants. The B47D20A petrol engine, while more reliable, can suffer from turbocharger wear in high-mileage 4 Series M4 Competition Convertible models. The 4 Series M4 Competition Convertible'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 M4 Competition Convertible Models - Engines Codes
The BMW 4 Series M4 Competition Convertible (F20 chassis, 2015-2019) used several engine codes, each with unique characteristics and failure patterns:
- N47D20C: 2.0L diesel found in 4 Series M4 Competition Convertible (F20, 2015-2019). Known for timing chain tensioner failure due to different EGR calibration in 4 Series M4 Competition Convertible.
- B47D20A: 2.0L petrol engine used in 4 Series M4 Competition Convertible (F20, 2015-2019). Offers improved fuel efficiency but can experience turbocharger wear in high-mileage 4 Series M4 Competition Convertible models.
- N47D20B: 2.0L diesel variant used in select 4 Series M4 Competition Convertible models. Shares components with N47D20C but has different calibration for 4 Series M4 Competition Convertible-specific driving dynamics.
- B47D20A-2: Updated version of B47D20A with enhanced oil cooling for 4 Series M4 Competition Convertible. Offers improved reliability but still requires monitoring for turbocharger wear.
- N47D20C-2: Updated version of N47D20C with improved timing chain design for 4 Series M4 Competition Convertible (2018-2019). Addresses earlier tensioner failures.
- B47D20B: 2.0L petrol engine used in 4 Series M4 Competition Convertible with different turbocharger calibration than in 116d, leading to unique failure points.
These engine codes are specific to the 4 Series M4 Competition Convertible 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 M4 Competition Convertible Engines
We offer a range of engine types for the BMW 4 Series M4 Competition Convertible, including used, reconditioned, rebuilt, and remanufactured options. For 4 Series M4 Competition Convertible 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-conscious 4 Series M4 Competition Convertible owners.
- Reconditioned: Engines restored to meet original specifications. Ideal for 4 Series M4 Competition Convertible with N47D20C engines.
- Rebuilt: Fully disassembled and rebuilt with new parts. Best for 4 Series M4 Competition Convertible with significant wear.
- Remanufactured: Restored to meet OEM standards. Recommended for 4 Series M4 Competition Convertible with N47D20C engines.
All engines undergo thorough inspection to ensure compatibility with your 4 Series M4 Competition Convertible's specific requirements.
BMW 4 Series M4 Competition Convertible Engines in Stock
Our reconditioned engines for the BMW 4 Series M4 Competition Convertible 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 to 4 Series M4 Competition Convertible.
- Turbocharger: Replaced in B47D20A engines experiencing wear.
- Oil Pump: Upgraded to prevent oil starvation in high-mileage 4 Series M4 Competition Convertible.
- Valve Cover Gasket: Replaced to prevent oil leaks common in 4 Series M4 Competition Convertible.
Each engine undergoes a comprehensive inspection and dyno test to ensure optimal performance and reliability for your 4 Series M4 Competition Convertible.
Warranty for Replacement BMW 4 Series M4 Competition Convertible Engines
We offer a minimum 12-month warranty on all reconditioned and remanufactured engines for the BMW 4 Series M4 Competition Convertible. 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 in 4 Series M4 Competition Convertible 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 M4 Competition Convertible
BMW 4 Series M4 Competition Convertible Engine Types Explained
- Used S55 engines from low-mileage 4 Series M4 Competition Convertible with documented history
- Reconditioned S55 engines with upgraded turbochargers for Competition applications
- Remanufactured S55 engines with reinforced internals for track-focused use
- For 4 Series M4 Competition Convertible S55B30, remanufactured units address turbo bearing issues
BMW 4 Series M4 Competition Convertible Replacement Engine Cost in the UK
- Used S55 engines for 4 Series M4 Competition Convertible £4,800-£5,800 depending on condition
- Reconditioned S55 engines cost £6,500-£7,500 with upgraded Competition components
- Remanufactured S55 engines £8,500-£10,000 with full warranty coverage
- Save up to 30% through Engine Finders when replacing 4 Series M4 Competition Convertible S55
Finding the Right BMW 4 Series M4 Competition Convertible Engine
- Check VIN for S55B30 engine code specific to 4 Series M4 Competition Convertible 2018-2020
- G23 chassis codes confirm correct 4 Series M4 Competition Convertible engine compatibility
- Don't confuse standard M4 S55 with Competition-specific calibration requirements
- Verify engine bay matches 4 Series M4 Competition Convertible cooling system configuration
BMW 4 Series M4 Competition Convertible Petrol vs Diesel Engines
- 4 Series M4 Competition Convertible only available with S55B30 petrol engine 2018-2020
- No diesel option available for 4 Series M4 Competition Convertible - all are twin-turbo petrol
- Petrol S55 engines have higher performance but increased maintenance for Competition models
- ULEZ compliant for 4 Series M4 Competition Convertible petrol engines from 2018-2020
Quality Assurance - Warranty
- For 4 Series M4 Competition Convertible S55 engines, turbocharger components are tested for bearing wear
- Intercooler cores checked for Competition-specific cooling system compatibility
- High-pressure fuel pumps tested with OEM 11537509638 specifications for Competition
- 12-month warranty covers S55 engine internals for 4 Series M4 Competition Convertible
Compare - Save on BMW 4 Series M4 Competition Convertible Engines
- Compare multiple suppliers for 4 Series M4 Competition Convertible S55 engine quotes online
- Avoid suppliers not replacing turbo bearings for S55 Competition
- Check if suppliers include ECU programming for 4 Series M4 Competition Convertible calibration
- Look for suppliers with G23-specific 4 Series M4 Competition Convertible experience
BMW 4 Series M4 Competition Convertible Engine Works: How Experts Rebuild Engines
When your engine fails, BMW 4 Series M4 Competition Convertible 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. Initial Inspection: Experts examine the S55B30 engine from your 4 Series M4 Competition Convertible using specialized diagnostic equipment to identify specific Competition variant damage patterns. This includes checking turbocharger bearing wear and enhanced cooling system integrity.
2. Disassembly - Cleaning: The 4 Series M4 Competition Convertible S55 engine is carefully disassembled using BMW-specific tools, with all components cleaned and catalogued. Special attention is given to turbocharger housings and intercooler cores for Competition-specific stress patterns.
3. Component Assessment: Each part from the 4 Series M4 Competition Convertible engine is measured against BMW specifications using precision gauges. Critical components like turbocharger bearings are checked for Competition-specific wear patterns.
4. Replacement Parts Installation: Worn components are replaced with OEM parts specifically for 4 Series M4 Competition Convertible applications. This includes upgraded turbocharger assemblies and enhanced cooling components designed for high-performance use.
5. Reassembly - Torquing: The 4 Series M4 Competition Convertible S55 engine is reassembled using BMW torque specifications and specialized tools. Critical fasteners are torqued to exact specifications with Competition-specific calibration requirements.
6. Testing - Quality Control: Completed 4 Series M4 Competition Convertible engines undergo dyno testing to verify original Competition performance parameters. This includes turbocharger response and ECU mapping specific to the high-performance S55B30 application.