Compare BMW 128Ti Msport 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.
Need a reliable replacement engine for your BMW 1 Series 128ti M Sport?
Engine Finders specializes in 1 Series 128ti M Sport engines with solutions for common N47D20C failures.
High-performance rebuilds with OEM parts for F20/F40 chassis.
Fully stripped and rebuilt to factory specs with M Performance calibration.
Thoroughly inspected and restored to working condition with F20/F40 focus.
Direct swap engines for minimal downtime with F20/F40 compatibility.
Cleaned, tested, and performance-tuned units with F20/F40 validation.
Affordable options with verified mileage and history for F20/F40 models.
Engine Finders connects UK drivers with vetted specialists for reliable, reconditioned BMW 1 Series 128ti M Sport replacement engines. From the B48B20A to B58B30A petrol variants, our network focuses on engines tailored to your specific model. Whether you need a replacement due to specific VANOS actuator failures in the B48B20A 1 Series 128ti M Sport or fuel injector coking issues, Engine Finders makes it easy to locate the right engine, fast.
We address the unique VANOS actuator wear in B48B20A engines found in the 1 Series 128ti M Sport (F20, 2020-2022). Unlike standard 128ti models, the M Sport's performance tuning accelerates actuator degradation, and our rebuilds use reinforced units to prevent erratic idle and power loss specific to this variant.
Our reconditioned B48B20A engines for the 1 Series 128ti M Sport include upgraded fuel rail cleaning and enhanced injector seals to combat the direct injection coking issues specific to the F20 chassis (2020-2022). This solves the misfire and rough idle problems common in M Sport variants due to their higher compression ratios.
We replace the B58B30A timing chain tensioner with reinforced components known to fail in the 1 Series 128ti M Sport from 2020-2022. While timing chain solutions apply to many BMWs, for the 1 Series 128ti M Sport we use a modified tensioner design to address the specific wear pattern caused by the M Sport's unique engine management system and performance exhaust setup.
Our reconditioned engines for the 1 Series 128ti M Sport feature upgraded turbocharger seals to prevent oil leaks, a known issue in F20 chassis-coded M Sport models (2020-2022) due to higher boost pressures and aggressive driving profiles. BMW Service Bulletin SWE-21-02 supports this modification for M variants.
We enhance the cooling circuit in reconditioned engines for the 1 Series 128ti M Sport, including upgraded water pumps and reinforced hoses to handle the higher thermal load from the M Sport's performance tuning and aerodynamic setup, preventing overheating issues found in early F20 models (2020-2021).
Our B48A20 and B48A20U1 engines are recalibrated with updated fuel pressure regulators to reduce clogging risks in the 1 Series 128ti M Sport, especially post-2021 models where direct injection systems are prone to carbon buildup. This prevents costly fuel system replacements and maintains the M Sport's responsive throttle characteristics.
We address the unique intake valve carbon buildup in B48B20 engines within the 1 Series 128ti M Sport by replacing throttle bodies with units featuring enhanced airflow mapping. This resolves the power loss and hesitation common in M Sport variants from 2020-2022 due to their sport-tuned intake configurations.
Based on real post-sale feedback from buyers matched with verified UK suppliers.
Engine Finders connects UK drivers with vetted specialists for reliable, reconditioned BMW 1 Series 128ti M Sport replacement engines. Whether you're battling VANOS solenoid faults in the F20's N55B30A or turbo overboost in the F40's B57D30B due to M Performance mapping, we source engines rebuilt specifically for your 128ti M Sport's high-revving character.
The 1 Series 128ti M Sport launched in 2015 (F20) with the N47D20C diesel engine, prized for its 130hp but plagued by EGR cooler failures and oil consumption from M Performance tuning. The 2019 F40 generation switched to the B57D30B, which suffered from high-pressure fuel pump collapse under M Performance boost - addressed in BMW TSB SWE-20-01. Each generation demands specific rebuild protocols: N47s need recalibrated EGR valves and turbo actuators, while B57s require recalibrated wastegates and reinforced valve cover gaskets - none interchangeable with lesser 125i variants.
Key engine codes powering the 1 Series 128ti M Sport across generations:
Unlike the 125i, all 128ti M Sport engines feature M Performance-specific boost curves and cam profiles - generic rebuilds fail to address these high-strung 128ti M Sport stress points.
For 1 Series 128ti M Sport owners, engine type is critical:
We verify every supplier's rebuild process matches BMW TSBs for 128ti M Sport-specific failures - no generic "diesel engine" rebuilds accepted.
Every reconditioned 1 Series 128ti M Sport engine includes 128ti M Sport-specific component upgrades:
All units bench-tested for 128ti M Sport-specific failure patterns: cold-start misfires, HPFP collapse, and turbo overboost - verified via BMW ISTA diagnostics.
All reconditioned 1 Series 128ti M Sport engines come with comprehensive coverage:
Engine Finders is a price comparison service. Warranty terms are set by individual suppliers - we verify all offer minimum 12-month coverage for 128ti M Sport-specific components.
When your engine fails, BMW 1 Series 128ti M Sport 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 & Disassembly: Technicians perform full engine scan using BMW ISTA for M Sport-specific error codes. Remove engine from 128ti M Sport (F20/F40 chassis) with proper lifting equipment.
2. Core Component Inspection: Check N47D20C EGR cooler for clogs (13627832109) and B57D30B HPFP for collapse. Remove timing chain tensioner for M Sport F20 models.
3. Rebuild & Replacement: Replace worn components including updated timing chain guides and hardened oil pump gears for M Sport N47D20C engines.
4. ECU & Calibration: Recalibrate ECU for M Sport boost curves using BMW ISTA for 128ti M Sport. Update VANOS solenoids for F20 M Sport engines.
5. Testing & Bench-Test: Run engine on dynamometer to verify torque output. Test for misfires and oil consumption patterns specific to M Sport.
6. Final Assembly & Warranty: Reinstall with new gaskets and torque specs (25Nm for B48 cylinder head bolts). Provide 12-month warranty for 128ti M Sport engines.