Reddit reviews Bosch WR1 Starter Relay
We found 1 Reddit comments about Bosch WR1 Starter Relay. Here are the top ones, ranked by their Reddit score.
Electrical components are securely assembled for dependable operationEngineered for durability to withstand high temperaturesGuaranteed against poor workmanship and material defectsPart number is specific to the vehicle's year, make and model
So, in the VW's (somewhat archaic) wiring, the starter circuit goes from the battery (in the back), to the front of the car to the ignition switch, and allll the way back to starter. Well, when these cars were new, and so were the wires, it worked ok. But, as they get older, and electrical connections get weaker, a lot resistance forms in the wiring. That kit I linked you to basically turns the original ignition wiring into an electrical "signal" for a relay. That relay's other circuit sends power straight from the battery directly to the starter so it's always getting all the battery has to offer. Even if it doesn't solve your issue, that would be one major upgrade, and a very inexpensive one at that.
EDIT: This is the link to the real Bosch set. Notice is has a fused circuit and much higher quality connections. You could also shop around and find the set for cheaper (I did) but that's about the going price. Good luck with your car.