Welcome to S4Mods.com

After replacing his turbos and transmission a Facebook user reached out to S4Mods to see if we could help figure out why his B5 S4 wont start. See the video below and lets see if we can crowdfix this car in an S4Mods.com first! Comment on this post and lets get this car running together!

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It’s been a long time since we’ve posted anything but the site is alive and well! People are using the site every day and thats exactly what we wanted when we started. We’d like to expand our reach and we ask that you check us out on Facebook and Instagram and the links below. Give us a like if you would! Thanks everyone!



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So I’ve been lurking here for years sucking up info, so I figured it’s time to give something back.

For those of you who like these kind of DIY write up threads here you go.

Using this wiring diagram as a guide, I started splicing away!

First made a little bracket to mount the controller and have a reference of the connector lengths. I didn’t take any pics of the routing under the dash but went through an unused relay spot then up through the hole in the ECU box.

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More shirt designs are up on our ViralStyle store page! Click here  or the image above to check them out! Use the coupon code “2point7t” to get $5.00 off. Leave a comment below and let us know what you think about our new shirts!


Thanks all,
Trey G … (read more…)


As most of you know by now, well known community member and Audi tuner, Daz has passed away. A GoFundMe campaign has been created to help his parents with the funeral costs in this very difficult time. In an effort to help, we at S4Mods have created a tshirt design in remembrance of Daz. ALL, and I mean ALL, proceeds will be donated to the gofundme campaign. Proof of sales costs for 100% transparency. If you’d like to directly donate to the campaign it can be reached here. Otherwise, click on the image above and you’ll be taken to our page where you can purchase the shirt.


RIP … (read more…)