Mrs 4

MRS 4
The changes on the MRS4 as compared with the MRS3 consisted of a modified processor and new software for calculating the restraint system triggering algorithm. The MRS4 was first used in April 2001 with the launch of the MINI as well as on the E46 (3 series) and E53.
The E38 and E39 models were fitted with the MRS4 for the first time in August 2001.