BMW i4 ADAS Calibration

ADAS Systems on the BMW i4

The i4 (G26, 2021+) is BMW's electric gran coupé, and its ADAS hardware is comprehensive:

Driving Assistant (standard):

• Front Collision Warning + AEB – forward camera behind windscreen plus front radar behind the lower bumper intake. The i4's low nose profile positions the radar lower than on BMW SUVs.
• Lane Departure Warning – camera-based lane tracking with steering wheel vibration alert.
• Speed Limit Info – camera reads road signs and displays limits on the head-up display.

Driving Assistant Professional (optional, common on eDrive40 and M50):

• Active Cruise Control with Stop & Go – radar-based speed matching, integrated with the i4's smooth single-pedal driving experience.
• Lane Change Assistant – side radar sensors behind the rear bumper panels detect adjacent traffic.
• Highway Assistant – semi-autonomous motorway driving combining all sensors.

The front radar is positioned behind the lower front bumper grille – lower than combustion BMWs due to the i4's aerodynamic design. This means kerb impacts and low-speed parking collisions can reach the radar even when the main bumper looks undamaged.

Common BMW i4 ADAS Issues

After Windscreen Replacement

The i4's most common calibration trigger. The forward camera handles multiple systems simultaneously, and windscreen companies that fit the glass often can't complete the BMW camera calibration. If your i4 shows Driving Assistant faults immediately after a windscreen swap, the camera needs static recalibration.

Low-Speed Bumper Contact

The i4's radar sits behind the lower front intake – a position that's closer to ground level than traditional BMW models. Car park kerbs, speed bumps at the wrong angle, and low bollards can contact this area without visibly damaging the main bumper. If Active Cruise Control drops out with no obvious cause, the lower radar position is likely why.

Post-Collision Multi-System Faults

A front-end collision on the i4 can knock out the forward camera and front radar simultaneously, disabling Driving Assistant, Active Cruise Control, and Lane Departure Warning in one event. Our collision calibration covers the radar realignment, and windscreen calibration handles the camera if the glass was also replaced.

BMW i4 Calibration Pricing

Service	Price
Windscreen Calibration	£199
Radar/Sensor Calibration	£349
Collision Calibration	£349
Full System Reset	£499

After windscreen replacement on your i4, camera recalibration is £199 – covering the forward-facing camera that controls Lane Departure Warning, Front Collision Warning, and Speed Limit Info. No diagnostic fees on top.