Customer reviews

”Very satisfied. For the first time i'm almost down to 0.5L/10km. And the car lost traction when i accelerated in first gear!“

– Alfa Gulietta

”Went home with 265HP, came with 224, and saving over 10% fuel as well!“

– Mercedes Viano

”Came with 116HP. Drove home with 153, and also about 30% more Nm from the bottom.“

– Toyota Previa

”Hello. New fuel record 400km drive without even trying. Down from 0,54 to 0,5 per 10km. Much more comfortable driving with less shifting and better low end torque. Not to mention it's awesome to feel that extra kick when stepping on it! Thanks for job well done!“

– Berlingo HDI

bestchip.eu / Bilmerker / BMW

Selected car

BMW 8er (G15) M840i xDrive

2998 ccm - 245 kW (333 HK) - 500 Nm

Depending on which engine you have in your car, you have different tuning box options. You have 1 alternative for your BMW 8er (G15) M840i xDrive. Please confirm that you have selected the correct engine from the vehicle list. These are the choices for M840i xDrive with 333 HP. The product images are illustrative and colors may vary from actual product.

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