Hello all you cats and kittens in MQB land! I think I am traveling down a solid path here. First, I want to qualify the following information with the fact that I have done zero testing on this, nor have I verified pinouts/wiring. I have ordered one of each variant and will be trying to track down the wiring diagrams for the options I have discovered. There are other load concerns with wire gauge in the stock harness as well. That could be overcome by using an empty 12V fuse location and using larger gauge wire and repinning the stock connector (as is done with other controllers such as the PM4).
One of the challenges faced when upgrading the stock LPFP is having to restrict the LPFP duty to limit the current draw so as to not burn up the stock MQB controller. I was previously triggered by two different brushless pumps: The Iroz and PAGParts units both pictured below:
Turns out the Iroz controller is from an older Tiguan and the PAGParts is from a RS3/TTRS (4M0906093N). The Iroz uses a custom harness and the PAGParts uses a jumper harness to convert from 7-spade to 5-spade to mate with the stock harness.
It wasn't until yesterday that I I have been thinking that there is no reason that VAG would produce exclusive connectors and controllers across every single platform. Turns out, that is correct. So far I have discovered variants with 3-spade, 5-spade, and 7-spade receptacles. The stock MQB controller is a 5-spade. When researching allowable current loads on the stock controller, I have seen anywhere from 15-17 amps referenced as the limit. The stock fuel pump controller/driver has a 15 amp fuse in the fuse box (stock controller shown below).
So I started doing some digging. Got on the good old Audi Parts USA website.In my quick search, I found two variants that look to utilize a similar connector. The first is for 2015+ Q3s and Tiguans. Part number: 5N0906093B. Crossreferencing the fuse chart for an Audi Q3 shows a 25A fuse and for a VW Tiguan shows a 20A fuse.
The second for Audi R8 / Q7s. The part number is: 4F1906093B. Crossreferencing the fuse chart for an Audi Q7 shows a 30A fuse.
At the end of the day, we will see what happens. I have a spare LPFP that I was going to chop up for my PR 525 kit. For now I am going to experiment on the stock LPFP and see if any DTCs arise. I will still utilize the stock, 15A fuse and wiring.
I know I might be crazy, but the rabbit hole was too tempting not to dive into head first. Let a guy know if he is crazy and please by all means, help shed some light on if this may be doable.
One of the challenges faced when upgrading the stock LPFP is having to restrict the LPFP duty to limit the current draw so as to not burn up the stock MQB controller. I was previously triggered by two different brushless pumps: The Iroz and PAGParts units both pictured below:
Turns out the Iroz controller is from an older Tiguan and the PAGParts is from a RS3/TTRS (4M0906093N). The Iroz uses a custom harness and the PAGParts uses a jumper harness to convert from 7-spade to 5-spade to mate with the stock harness.
It wasn't until yesterday that I I have been thinking that there is no reason that VAG would produce exclusive connectors and controllers across every single platform. Turns out, that is correct. So far I have discovered variants with 3-spade, 5-spade, and 7-spade receptacles. The stock MQB controller is a 5-spade. When researching allowable current loads on the stock controller, I have seen anywhere from 15-17 amps referenced as the limit. The stock fuel pump controller/driver has a 15 amp fuse in the fuse box (stock controller shown below).
So I started doing some digging. Got on the good old Audi Parts USA website.In my quick search, I found two variants that look to utilize a similar connector. The first is for 2015+ Q3s and Tiguans. Part number: 5N0906093B. Crossreferencing the fuse chart for an Audi Q3 shows a 25A fuse and for a VW Tiguan shows a 20A fuse.
The second for Audi R8 / Q7s. The part number is: 4F1906093B. Crossreferencing the fuse chart for an Audi Q7 shows a 30A fuse.
At the end of the day, we will see what happens. I have a spare LPFP that I was going to chop up for my PR 525 kit. For now I am going to experiment on the stock LPFP and see if any DTCs arise. I will still utilize the stock, 15A fuse and wiring.
I know I might be crazy, but the rabbit hole was too tempting not to dive into head first. Let a guy know if he is crazy and please by all means, help shed some light on if this may be doable.