Want a little boost to horsepower and low end torque without going the full 9 mile of doing a full tuning? You might want to consider chip tuning. It’s easy to install and remove without visiting a workshop. The example below was done on a 218i F45 using a tuning chip from Racechip.com. Do note the sensor locations will be different for a diesel ride. Disclaimer: This guide serves as an additional reference and not meant to replace the official instructions from Race chip.
Before you start, open the bonnet and lock the car and wait for 10 minutes. This is to ensure all electrical in the car are turned off. Remove the battery from your key fob or move the key fob at least 10 meters away from the car.
First, remove the air intake manifold. There are 3 torx screws to remove. You can easily locate them.
After removing the manifold, locate the turbo boost pressure sensor (A) and manifold absolute pressure sensor (B). These are the 2 sensors you need to remove and interconnect with the wiring harness that comes with Racechip. Refer to exact instructions from race chip on how to interconnect the wiring harness to these 2 sensors. They are pretty straightforward.
Close up on turbo boost pressure sensor.
Close up on manifold absolute pressure sensor. This sensor may be a little hard to access when the engine is hot. You will need a a pair of long pliers to help you reach and replace with the wiring harness connector.
After the wiring harness are all connected, it’s time to connect the racechip. Remove the adaptor from the harness and connect the racechip. It’s important that at this stage, you shouldn’t see the LED light on the racechip come up to avoid errors showing up in the car. Start the car and observe that the car starts without errors. Turn off the car after that.
Secure racechip in the engine bay away from heat and cable tie the wiring harness and chip to give it an OEM look. Replace air intake manifold. The below is a complete racechip install.
Start your car and take it for a spin! You should immediately notice an increase in low end torque and possibly, horsepower too.