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Audi a4 b5 - Remote opening (remote control) for the central locking - how to ad

Meon 11886 14
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  • #1 16787957
    Meon
    Level 11  
    Posts: 220
    Rate: 41
    Hello,
    I have a4 from 1995. It has a central locking, ie if I close one door, they all close.
    I would like to add a remote control.
    What is the cheapest and easiest way to do it?

    Greetings.
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  • #2 16787984
    spinacz
    Level 42  
    Posts: 8536
    Help: 1192
    Rate: 2616
    In hardware, you need a universal radio controller for central locking and then knowledge and assembly skills.
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  • #3 16787987
    enhanced
    Level 43  
    Posts: 10427
    Help: 961
    Rate: 876
    There are central locks on the remote control on the Allegro - PLN 50 approx. The issue of soldering under the master actuator.
  • #4 16788002
    andrzej20001
    Level 43  
    Posts: 17696
    Help: 1568
    Rate: 6610
    Above your legs you have a relay box, above it an ankle with locking pins. open Blinkers under cover on the side.
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  • #5 16788024
    Meon
    Level 11  
    Posts: 220
    Rate: 41
    Honestly, I do not even need flasher signals.
    It is enough for the car to close and open.
    I thought about taking the bacon off one door and it hooks up there. I guess I was wrong.
  • #6 16788043
    enhanced
    Level 43  
    Posts: 10427
    Help: 961
    Rate: 876
    You do not have to connect signaling - you connect whatever you want.

    It is best to solder somewhere in the middle of the car because apart from the output signal (here you need to know whether minus or plus), you must have +12 and ground connected to this control unit. And somehow release the antenna somewhat outside.
  • #7 16788053
    autoas
    Level 42  
    Posts: 9188
    Help: 571
    Rate: 3900
    You can do anything with the compressor ... the easiest way ...
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  • #8 16788071
    Meon
    Level 11  
    Posts: 220
    Rate: 41
    At what compressor, my friend?
    I would be grateful for a piece of instruction :)
  • #9 16788083
    autoas
    Level 42  
    Posts: 9188
    Help: 571
    Rate: 3900
    In this yearbook you have a pneumatic lock ... am I wrong?
  • #10 16788086
    Meon
    Level 11  
    Posts: 220
    Rate: 41
    Unfortunately, I have no clue. How to check?
  • #11 16788129
    Ireneo
    Level 42  
    Posts: 7818
    Help: 746
    Rate: 2453
    This is the beginner section, since the guest does not read the regulations. The old Audi on this forum and on the network describes how to connect and what a central pump is. You write back to the lazy and then a garbage can is created, dozens of threads on one topic.
  • #12 16788134
    Meon
    Level 11  
    Posts: 220
    Rate: 41
    So please go to the beginners section.
    I searched, I did not find.
    Unfortunately, through people like you, he finds topics that end with a post everywhere: it was already, search. Since it was, and someone did not find it, please give me a link. Lenie.


    Moderated By T5:

    3.1.9. Do not be ironic and do not be mean with the other side of the discussion. Please respect dissenting opinion and other opinions in the forum.
    Warning.

  • #13 16788138
    autoas
    Level 42  
    Posts: 9188
    Help: 571
    Rate: 3900
    And you don't even know the basic rule of this forum ... ask and thank you ....
    We're closing....
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Topic summary

✨ The discussion revolves around adding a remote control feature to the central locking system of a 1995 Audi A4 (B5). Users suggest using a universal radio controller for central locking, with costs around PLN 50 for components. Key steps include soldering connections to the master actuator and ensuring proper power supply (+12V and ground) to the control unit. Some participants mention the possibility of connecting the system without signaling features, while others emphasize the importance of understanding the vehicle's pneumatic locking system. Links to additional resources and instructions are provided for further guidance.
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FAQ

TL;DR: Fit a universal radio controller (approx. PLN 50) to the Audi A4 B5 central lock; "PLN 50 approx." [Elektroda, enhanced, post #16787987]

Why it matters: This FAQ shows beginners how to add remote locking cheaply and cleanly to a 1995 A4 B5.

Quick-Facts

Quick Facts

What’s the cheapest way to add remote central locking to an Audi A4 B5?

Use a universal radio controller for central locking. Expect about PLN 50 for the kit on Allegro. Connect it to the existing central lock system and pair the remotes. This is the budget route and works well for daily use. [Elektroda, enhanced, post #16787987]

Where should I connect the remote module in a 1995 A4?

Access the relay box above the driver’s feet. Above it is a connector with central-lock pins. Remove the side cover to reach indicator wiring if needed. This location keeps wiring short and serviceable. [Elektroda, andrzej20001, post #16788002]

Do I need to wire the turn-signal flash confirmation?

No. The central lock will open and close without signal flash wiring. As one expert put it, “You do not have to connect signaling.” Add it only if you want visual feedback. [Elektroda, enhanced, post #16788043]

What exact wires does the controller need?

Plan for three connections: +12 V, ground, and the lock trigger output with correct polarity (minus or plus). Many universal modules expose both. Choose the polarity your car expects. [Elektroda, enhanced, post #16788043]

How do I know if my 1995 A4 has a pneumatic lock (compressor)?

Most 1995 A4 B5 cars use a pneumatic central-lock pump, often called a compressor. If yours does, the remote controller simply triggers the pump, not individual door motors. [Elektroda, autoas, post #16788083]

What does “compressor” mean in this context?

It refers to the pneumatic central-lock pump that drives vacuum/pressure to lock or unlock all doors. Installers can integrate the radio controller to command this pump. “You can do anything with the compressor ... the easiest way.” [Elektroda, autoas, post #16788053]

Can I hook in at the master door actuator instead of the footwell?

Yes. Some kits are soldered near the master actuator. However, placing the controller centrally can simplify power and antenna routing. Choose whichever access is cleaner on your car. [Elektroda, enhanced, post #16787987]

Where should I place the antenna for best range?

Route the controller’s antenna slightly outside the metal cabin envelope. Avoid tucking it deep under the dash. A semi-exposed run behind trim improves reception. [Elektroda, enhanced, post #16788043]

What happens if I select the wrong trigger polarity?

If you choose the wrong polarity, the lock won’t respond correctly. Set the module to the minus or plus output your Audi expects. This avoids false triggers and no-ops. [Elektroda, enhanced, post #16788043]

Is blinker wiring required for safety or legality?

No. Blinker wiring is optional and only adds visual confirmation. The central locking will operate reliably without it. Many owners skip it for a faster install. [Elektroda, enhanced, post #16788043]

Do you have a quick 3‑step how-to for beginners?

  1. Identify access: relay box above driver’s footwell; plan antenna routing.
  2. Connect +12 V, ground, and select correct output polarity on the controller.
  3. Mount the module securely and route the antenna slightly outside. [Elektroda, enhanced, post #16788043]

Where can I find a wiring photo guide for the A4 B5?

See the linked A4-club walkthrough with connection descriptions and photos. It complements this thread and shows practical tap points. [Elektroda, andrzej20001, post #16789463]

Is there another thread that covers this exact topic?

Yes. A moderator shared a previously answered topic covering connection details for the A4 B5 central locking and remote integration. [Elektroda, T5, post #16788236]

I don’t care about flashers—just lock/unlock. Is that fine?

Yes. Many installs skip turn-signal integration. Wire only the lock control and power, and you’re done. Function remains identical. [Elektroda, enhanced, post #16788043]
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