My left turn signal is flashing very rapidly both on the dash and at the front and rear tail light section. This of course only occurs when the left turn signal is activated. The right side works fine.
Anyone know what the problem may be?

PS. I recently purchased a Sirius radio receiver which plugs into the cigarette lighter, I do not know if this may have caused a problem.
Please help

My Z3 has the same problem. I've found that it only happens when the lights are on. Is yours the same way?