Car remapping: the comprehensive manual

Everyone wants to get the most mileage out of their vehicle, and remapping makes it possible. Enthusiasts of cars may insist on rewriting their vehicle’s Engine Control Unit (ECU), but the average car owner may not dare dabble in the field.

Read More: ECU Remap Car

What is an automobile’s remap?

Remapping, often known as chip tuning or ECU tuning, is the process of changing an automobile’s ECU’s settings. The ECU in your automobile has a fixed configuration that it comes with, but you may override it.

Traditionally, “chipping,” or removing the outdated ECU from an automobile and installing a new one, was the process of remapping. Since then, technology has advanced. Usually, you may have the factory ECU that came with your car rewritten, or you can have it done by a professional. This will need using the OBD (On Board Diagnostics) to access the chip.

Some newer vehicles may limit access through the OBD for security reasons. If so, it is necessary to physically remove the ECU and attach it to an external computer. As an alternative, an additional external ECU might be utilized. This can be a good alternative because it leaves the car exactly as it was, only adding a second ECU that you can simply remove if you ever decide to trade it in or sell it.

How does the ECU function?

A car’s ECU controls a number of crucial operations, such as:


Door locks

Braking in an emergency

reactivity of the engine

These are all obviously very, very vital parts of your automobile, and it may be disastrous to inadvertently change any of them from their intended role. Therefore, you shouldn’t attempt automobile remapping at home unless you are well-versed in programming and safe vehicle operation.

What does a car’s ECU remap accomplish?

Engine remapping is a popular method used by enthusiasts and racers to tune their cars to perform exactly as they desire. It can alter how an engine behaves while you drive. Remaps have the ability to increase a car’s power and torque, which is why racers in particular would desire to do so.

There’s a strong possibility your automobile isn’t built to run at maximum capacity at factory settings. This may be the result of a variety of factors, including cost-effective decisions made by the manufacturer or compliance. It’s also the reason why a more powerful version of the identical automobile may be launched; all that has to happen is for the ECU code to be altered.

Properties of remapping cars:

better timing of the ignition

improved responsiveness from the engine and throttle

increased torque and power when ascending

improved ratio of gasoline to air

enhanced boost pressure during turbocharging

Drawbacks of remapping an automobile:

If you put greater stress on your engine, you may need more maintenance.

You might have to switch to a more expensive, higher-octane fuel.

It might take some time for you to become used to the greater power.

Remapped automobiles could not be accepted for coverage by insurance carriers.

If you remap your automobile, it can void your warranty.

Your personalized preferences will be replaced by the frequent software updates for cars. Consequently, each time your automobile receives servicing, you will need to reprogram the ECU.

What is the price of remapping?

Typically, a car remap will cost you about £300, however the exact cost will depend on what’s included.

Of course, there are additional costs associated with remapping your automobile. This involves paying more for insurance or having trouble obtaining coverage at all. Additionally, it might nullify your warranty, leaving you uninsured in the event that your vehicle is damaged. Additionally, upgrading your car’s gasoline may be necessary to increase its power, and this might be more costly.

Remapping your automobile might have an effect on your contract if you bought it on credit or leased it. Generally speaking, you should anticipate that no third party—from the manufacturer to the insurance company—will be amenable to remapping your vehicle. The best course of action is to give them a call to find out precisely what they think remapping your automobile would alter.