PSR Parts - External ECU Remap Tuning - BMW G20 G21 320e PSR-ECU-BMW-G2X20e

Unlock the full potential of your BMW G20/G21 320e with the PSR Parts External ECU Remap Tuning, delivering 260HP and 440Nm of torque. This advanced tuning solution provides safe, reversible, and engine-specific power upgrades without modifying the original ECU software.

Unlike standard “PowerBox” units, the PSR External ECU is a sophisticated engine management system. Traditional power boxes rely on limited sensors and often fail to account for turbo pressure or engine load, which can lead to excessive fuel injection, soot buildup, and poor compatibility with modern OPF-equipped engines. The PSR External ECU instead uses multiple sensor inputs via CANBUS, calculating optimal torque and power output for every throttle input while maintaining engine safety and efficiency.

Key Features & Benefits

• Advanced Engine Control: Monitors RPM, turbo pressure, and engine load for precise power delivery

• Dynamic Fuel Injection: Adjusts injection duration for improved low- and mid-range torque

• Turbo Boost Optimization: Regulates turbo spool-up and pressure for stronger acceleration and higher power across a wide rev range

• Load-Dependent Power Delivery: Dynamically adjusts fuel and torque based on accelerator input for smooth daily driving or aggressive performance

• Fuel Efficiency Gains: Fine atomisation of fuel delivers the same horsepower with less consumption

• Safe & Reversible: Fully reversible installation without altering the original ECU software

• Persistent Performance: Retains tuning through manufacturer software updates

How It Works

1. Engine RPM Monitoring: Reads camshaft or CANBUS signals for accurate torque calculation

2. Torque Calculation: Measures engine acceleration to optimise fuel and boost delivery

3. Injection Duration: Extends fuel injection via map sensor for smooth, responsive power

4. Turbo Boost Control: Adjusts turbo spool-up timing and regulates pressure for maximum pulling power

5. Load-Dependent Adjustment: Fuel and torque dynamically respond to throttle input

6. Fuel Economy Optimization: Efficient fuel delivery provides higher performance with minimal fuel usage

Specifications

• Output: 260HP / 440Nm

• Installed in the engine compartment for persistent tuning

• Fully reversible and non-invasive installation

• Safe power optimisation within engine limits

• Improves throttle response, torque, and drivability

• Compatible with BMW G20/G21 320e plug-in hybrid powertrain

Installation Notes

• Professional installation recommended if unsure

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

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

• No permanent modifications required

Compatibility / Fitment

• BMW G20 320e (2019+)

• BMW G21 320e Touring (2019+)

Designed specifically for BMW G20/G21 320e plug-in hybrid powertrains.