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Originally Posted by EE3racing
IMHO, Litronics are not plug & play at all. It took me the better part of four weeks to dial in the aim points for both units.
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Litronics originally installed on the cars were only available with Automatic Dynamic Headlight Beam Adjustment (AHBA) and included the washers. These corrected the beams to compensate for the uneven road conditions and the dynamic pitching motion of the car. The system required a stepper motor, wheel speed sensor units, and front and rear suspension level sensors.
The retro-fit units offered by Porsche are the same headlights as on the original, but without the AHBA and cannot be diagnosed with PST2. I had the originals on a 2001 911 and have the reto-fit kit on my Boxster. I can't tell any difference between the two. The ones being offered by most US vendors for ~$2,400 are the reto-fit kits.
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