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Greg Lynch

The part was correct, programming correct, and I'm now all up running smoothly again. I will certainly go to Protech Auto Sytems again should I ever need another part. Excellent service and customer support. 5 STARS!

Tess Arquieta

Having never ordered a part like this online before, I was a bit skeptical at first. However, Protech quickly delivered the computer as promised, and saved me 400$ that I would have had to pay at the Ford dealer. Thanks Guys, I would recommend you to anyone!

Breanne Benys

I have been looking for months for a PCM for my truck and no luck. Finally I found protechauto, they have the best customer service and had my PCM I needed, it was fast and easy all I had to do was plug it in and go, I will always do business with protech.

n0543

CALL NOW! 1-877-764-5402

ProTech Auto Systems is your trustworthy supplier of all ECM, PCM and ECU n0543 Auto Computers. These devices monitor the fuel, air and electrical aspects of a n0543 engine to ensure optimal engine performance. When an auto computer becomes impaired, that is where ProTech Auto Systems steps in. We provide full-service repair, replacement and reprogramming services to get your n0543 properly running again. ProTech Auto Systems offers high quality customer service including free tech support, along with a money back guarantee on all products.