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Old 01-14-2013, 08:13 PM   #6
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Join Date: Feb 2008
Location: Mountain Top
Posts: 6,113
My Ride: 2005 M3 Coupe
Originally Posted by jfoj View Post
Just get BMW Scanner 1.4.0 for $32 and code the cold/warm check to off, this is what they do on the cars with factory LED's.
Not exactly. The cold/warm checks are disabled, but the other difference is that the LEDs are controlled via PWM rather than simply sending a lower voltage. If you look at a car with factory LEDs or properly retrofitted LEDs and compared it with one that uses resistors or simply disabled cold/warm checks, you'll notice the latter has a slight flicker.

The best way to do an LED retrofit is to add "+LEDH" to your vehicle order and then recode the LSZ with a blank FSW_PSW.MAN. The +LEDH in the vehicle order will tell the system to code the car for an LED retrofit.
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