Compass Changes Direction When Operating The RHT (51 28 07)

Publication date: 2007-12-03
Reference number: 51 28 07

COMPASS CHANGES DIRECTION WHEN OPERATING THE RHT

TECHNICAL SERVICE BULLETIN

Reference Number(s): SI B51 28 07, Date of Issue: December, 2007

BMW:	E93 (3 Series Convertible)
GROUP:	Body Equipment

SUBJECT

Compass Changes Direction when Operating the RHT

SITUATION

When opening the Retractable Hardtop (RHT), the compass located in the rearview mirror may spontaneously change direction by up to 90 degrees.

CAUSE

The movement of the front panel of the RHT causes a disruption to the magnetic field, which is used by the compass to determine the correct direction.

CORRECTION

No corrective action is necessary.
The compass will again display the correct direction if:
- The RHT is closed immediately after opening.
- The vehicle is driven a short distance in order to recalibrate the compass.