Interior, A/C - Seat Heaters Don't Feel Hot Enough
SI B52 09 08Seats
April 2009
Technical Service
This Service Information bulletin supersedes SI B52 09 08 dated November 2008.
[NEW] designates changes to this revision
SUBJECT
Seat Heater Does Not Feel Hot Enough
MODEL
E70 (X5) equipped with Comfort Seats (SA456)
E71 (X6) equipped with Comfort Seats (SA456)
SITUATION
The customer may feel that the seat heater is not reaching a high enough temperature, even when on the warmest setting.
If the vehicle is compared to a like vehicle, the result is the same. However, if the vehicle is compared to another E70 or E71 without Comfort Seats, the maximum temperature on those seats will be noticeably
higher.
CAUSE
The seat heater is functioning properly; however, the set point for maximum temperature in the seat module has been set lower on the Comfort Seat than other X5 and X6 seat variants.
[NEW] PROCEDURE
Do not replace any parts.
Program the vehicle using ISTA/P 2.33.0 or later.
Note that ISTA/P will automatically reprogram and code all programmable control modules that do not have the latest software.
For information on programming and coding with ISTA/P, refer to CenterNet / Aftersales Portal / Service / Workshop Technology / Vehicle Programming.
[NEW] WARRANTY INFORMATION
Covered under the terms of the BMW New Vehicle Limited Warranty.