PSR Parts - External ECU Remap Tuning - BMW F40 118i PSR-ECU-BMW-F4X118I

Unlock the full performance potential of your BMW F40 118i with the PSR Parts External ECU Remap Tuning, specifically engineered to deliver 175HP and 270Nm of torque while preserving the original ECU software. Unlike traditional “PowerBox” solutions, the PSR External ECU offers advanced engine management, providing precise power delivery, improved throttle response, and optimized torque across the entire rev range.

The PSR External ECU is a specialist tuning solution for BMW, Audi, and Volkswagen vehicles, designed to outperform conventional plug-and-play power boxes. While typical PowerBoxes rely on limited sensor input, our advanced ECU utilizes multiple engine signals, including turbo pressure, engine speed, and load data via CANBUS, ensuring precise and safe power optimization. This prevents over-fueling, excessive soot buildup, and compatibility issues common with modern engines fitted with OPF/DPF filters.

Key Features & Benefits

• Advanced Engine Control: Monitors multiple sensors including turbo boost, RPM, and acceleration to calculate optimal torque and power output.

• Dynamic Fuel Injection: Extends injection duration using live map sensor data, optimizing power delivery and efficiency.

• Turbo Boost Optimization: Adjusts turbo spin-up and regulates boost pressure for improved low-end torque and a more aggressive character under full load.

• Load-Dependent Power Delivery: Dynamically adjusts fuel and boost based on accelerator input for a smooth, usable power curve.

• Fuel Efficiency: Fine-tuned injection improves fuel atomization, delivering the same power with lower fuel consumption when driving normally.

• Reversible & Safe: Fully reversible installation without altering the original ECU. Maintains all factory turbo limits and engine safety parameters.

• Persistent Performance: The external ECU remains active even after manufacturer software updates, unlike software remaps that may be overwritten.

How It Works

1. Engine RPM & Load Monitoring: Reads engine speed from camshaft signals or CANBUS to calculate optimal torque and power.

2. Torque Calculation: Measures engine acceleration to adjust fuel and boost dynamically.

3. Fuel Injection Duration: Extends injector runtime for improved torque and responsiveness.

4. Turbo Boost Timing & Pressure: Optimizes turbo spool-up and regulates boost for maximum safe performance.

5. Load-Dependent Adjustment: Fuel and torque are adjusted in real time, providing smooth everyday driving and aggressive performance on demand.

6. Fuel Economy Optimization: Fine atomization of fuel allows higher performance with efficient fuel consumption.

Specifications

• Installed in the engine compartment for persistent tuning unaffected by software updates

• Fully reversible in minutes without affecting original ECU software

• Safe performance tuning within engine limits

• Improves throttle response, torque, and usable power

• Supports better fuel efficiency and smooth drivability

Installation Notes

• Recommended professional installation if unsure

• Let the vehicle rest for 10 minutes after opening the hood before unplugging sensors

• OBD tools may be required to clear any errors after installation

• No permanent modifications required; fully reversible

Compatibility / Fitment

• BMW F40 118i (2014+)

• Output: 175HP / 270Nm

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