91-92 VW Golf Jetta SIEMENS ECU Computer 037906023R
VW ECU Up for sale is a Working, in excellent condition VW Volkswagen Golf Jetta Digifant 1 Engine computer ECU. VW part number 037 906 023 R . This ECU should fit some Cal emission 91-93 Golf, Jetta & Passat models, As always your best bet is to match the part numbers with the one on your original ECU. These are located in the cowell (under the plastic piece the wipers sprout out of).
This unit offers a 30 day functionality warranty. The Digifant 1 engine computer for Golf, Jetta, Fox, and Cabriolet with California Emission are quite the rareity! Grab this unit if you have a faulty unit or need a spare. This has the DTC OBD fault memory storage and was a California only option for selected vehicles made by Volkswagen from 1991-1993. From Wikipedia- System Variants (North America Only) In North America, Volkswagen released two versions of the Digifant Fuel Injection system. Note that this refers to A2 Golf and Jetta models only. Digifant I was used exclusively in California market vehicles. Primary differences between Digifant I and Digifant II are as follows: A limited number of 1987-1990 California Golf and Jetta models are equipped with an On Board Diagnostics system (OBD). These vehicles have blink code capacity to store up to 5 Diagnostic Trouble Codes (DTCs). For the most part, diagnostic troubleshooting is done with a Volkswagen special tool, known as the VAG 1598 and a Digital Multimeter. This system can also have carbon monoxide (CO), ignition timing and idle speed adjusted to baseline values. In 1991, California Golf, Jetta, Fox, Cabriolet and Corrado vehicles were equipped with expanded OBD capabilities. These later Digifant versions have 38-pin ECMs with Rapid Data Transfer and permanent DTC memory. All Eurovans with Digifant also have rapid data transfer and permanent DTC memory. These systems use a throttle plate potentiometer to track throttle plate position in place of the idle and full throttle switches used on earlier systems. Another characteristic of Digifant 1 equipped vehicles is a switch mount on the dashboard which has a "Check Engine" symbol. As always with this type of component your best bet is to match the part number to the one on your original ECU. A faulty ECU is one of the most common no start or random stalling problems with these cars. These can also cause issues with erroneous check engine lights, idle control problems as well as emission control & cold or hot start problems. I have also seen fuel pump relay turn on faults (ECU won't turn on the fuel pump), as well as an condition where the high speed injector driver has failed. This causes the car to sit and idle fine, but it won't accelerate.
If your car does not have these issues but you intend to keep it a while, I recommend our customers keep an extra ECU in the trunk. These units now have to be special ordered from most dealers new for big $$ (often times over $1000!), and you can never find one when you need one. Even now finding a good one second hand is getting to be quite difficult as these cars get older.