Trimsteg

BMW 4 Series420i (B48) 181 hk

Available Services

• Model

  BMW 4 Series

• Variant

  420i (B48) 181 hk

• Years

  2016-now

• Fuel

  Petrol

• Engine Size

  1998

• ECU Type

  Bosch MG1CS003

Celtic Tuning's economy software is designed to improve fuel efficiency during normal daily driving, specifically under part-throttle conditions.

It delivers a smoother power curve and improved fuel economy, though actual savings and performance gains will depend on factors such as driving style, road conditions, and vehicle load.