Skip to content
View in the app

A better way to browse. Learn more.

Audi Owners Club (UK)

A full-screen app on your home screen with push notifications, badges and more.

To install this app on iOS and iPadOS
  1. Tap the Share icon in Safari
  2. Scroll the menu and tap Add to Home Screen.
  3. Tap Add in the top-right corner.
To install this app on Android
  1. Tap the 3-dot menu (⋮) in the top-right corner of the browser.
  2. Tap Add to Home screen or Install app.
  3. Confirm by tapping Install.

Welcome to the Audi Owners' Club - An Independent community!

Membership is completely free, and our community is built by enthusiasts, for enthusiasts. We’re a proudly independentnon-official club, so all the help and opinions you’ll find here come directly from members with real experience of Audi ownership.

Join the club now!

 

A4 fuse and relay pulling as anti-theft measure

Featured Replies

Hi everyone,

I recently bought a 2023 A4 Avant 2.0 TFSI (left-side drive). Since I live in an area where car thefts are not that unusual, I want to make sure the car is not startable. Logistically I am fine with pulling the relays and/or fuses every time since the car will not be driven every day and is in a garage.

Could you guys provide some opinions on the following ideas:

----------------------------------------------------------------------------------------------------------------------------------------

Fuel-Pump control unit fuse -> Fuse 16 in ST1 in Relay and fuse carrier 1 -SR1- with fuse holder B -SB (Drivers foot support)

This fuse is relatively easy to access (one screw) and should disable the fuel pump. Car will crank but no start.

Starter Relay(s) -> R2 and R3 in Relay and fuse carrier 3 -SR3

Not sure how easy this is to access but from the picture in "fitting locations" it does not look too complicated.

I also don't get it why are there two starter relays. Is one for the motor and one for the solenoid? 

If those relays are out car will not crank but the fuel pump will flood the cylinders.

----------------------------------------------------------------------------------------------------------------------------------------

Correct me if I'm wrong, but there shouldn't be any negative effects for the car by letting it sit for a couple of days without any of those fuses/relays.

And did I find the correct fuses and locations for wanted effects?

audi-a4-2015-fitting-locations-eng (1).pdf audi-a4-2015-wiring-diagrams-eng (1).pdf

Create an account or sign in to comment





Background Picker
Customize Layout

Account

Navigation

Search

Search

Configure browser push notifications

Chrome (Android)
  1. Tap the lock icon next to the address bar.
  2. Tap Permissions → Notifications.
  3. Adjust your preference.
Chrome (Desktop)
  1. Click the padlock icon in the address bar.
  2. Select Site settings.
  3. Find Notifications and adjust your preference.