ECU (Engine Control Unit) remapping, also called ECU tuning or chipping, modifies the software or firmware of the vehicle that is responsible for controlling the operations of the vehicle’s engine. The ECU manages different engine functions like:

  • Fuel Injection
  • Ignition Timing
  • Turbocharger Boost Pressure

Remapping involves reprogramming the ECU to alter the default settings of these functions to achieve improved performance, fuel economy, or a combination of both.

ECU remapping services have become increasingly popular as car enthusiasts seek to improve their vehicle’s performance, fuel efficiency, or both. ECU remap can result in significant gains in horsepower and torque and can also improve throttle response and acceleration

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Increased Horsepower and Torque

By adjusting the engine’s fuel and air delivery parameters, professional ECU remapping can increase the engine’s horsepower and torque, which results in better acceleration and top speed.

Improved Throttle Response

ECU remapping helps reduce the delay between the pressing of the accelerator pedal and the response from the engine, getting a more immediate response from throttle control.

Better Fuel Economy

By optimising the engine’s fuel delivery parameters, ECU remapping can improve the vehicle’s fuel economy, resulting in cost savings over time.

Enhanced Drivability

ECU remapping can improve the overall driving experience by smoothing out rough idling, eliminating flat spots in the power delivery, and reducing turbo lag, making the vehicle more enjoyable to drive.


ECU remapping can be customised to suit the driver’s specific needs and preferences, such as performance-oriented or fuel-efficient driving styles.

It’s important to note that the degree of performance improvement achieved through ECU remapping depends on various factors, such as the vehicle’s make and model, the engine’s condition, and the remapping service’s quality.

ECU Remapping Services

Reidy Remaps Can Offer

DTC Removal
DPF Removal
EGR Removal
Diagnostics Services
Custom Remaps /
Chip tuning
Immobiliser Repair /
Rolling Road /
Dyno Runs
Turbo Conversion Mapping Work on OEM ecu

Remapping Software or Hardware Process

ECU remapping can involve both software and hardware processes. The software process consists of modifying programming code that affects the engine’s parameters, including fuel injection timing, turbocharger boost pressure, and more. On the other hand, the hardware process involves physically replacing the ECU with an aftermarket unit specifically designed to deliver improved performance.

Both software and hardware processes can offer significant benefits in terms of improved performance and drivability. The choice between the two largely depends on the desired performance improvement, the vehicle’s make and model, and the service provider’s expertise.

List of Defects of ECU Software

There can be various defects or issues with ECU software that may affect the performance or reliability of a vehicle. Here are some common faults of ECU software:

  • Bugs or glitches
  • Malware or viruses
  • Incompatibility issues
  • Calibration problems
  • Security vulnerabilities
  • Improper tuning

It’s necessary to note that regular software updates and maintenance can address most ECU software defects, and proper tuning and customisation can help mitigate most issues.

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Why Does Factory Not Remap the Vehicles?

There are several reasons why factories do not remap vehicles before they are sold. Here are some of the reasons:

Compliance with Regulations: Car manufacturers must comply with strict emissions and fuel efficiency regulations set by various governmental agencies. Remapping a vehicle’s ECU can affect the emissions and fuel efficiency levels, making it difficult for manufacturers to ensure compliance.

Standardisation: Car manufacturers produce vehicles in large quantities and must ensure that each vehicle meets the same quality and performance standards. Keeping the ECU programming the same for each vehicle can ensure consistent performance across the board.

Reliability and Longevity: Manufacturers design their engines to last long and operate under specific conditions. Remapping the ECU can potentially shorten the lifespan of an engine or cause reliability issues if not done correctly.

Warranty Considerations: The warranties provided by manufacturers cover certain types of replacements and repair. Remapping  can be considered an unauthorised modification which voids the warranty

ECU Remapping Cost

The cost of ECU remapping  depends on factors like”

  • Make and model of your car
  • The level of customisation you want
  • The service provider (ECU remapping company)

However, ECU remapping services can cost between $300 and $1000 or more on average. It’s essential to remember that the cheapest option is not necessarily the best one. Also, keeping quality in mind is vital as you must not compromise the quality to save a small amount as later it can result in a considerable loss. It’s advisable to research and compare prices from different providers and choose a reputable and experienced service provider who can offer you a fair price and quality service.