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Audi A3 8L 1998 - Light Switch Replacement without Identification Number: Rear Fog Lights Only

Pawel.k20 7752 11
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  • #1 16756275
    Pawel.k20
    Level 7  
    Posts: 25
    Rate: 6
    Hello all.
    I have a broken light switch and I would like to buy a new one, but there is a problem.
    Well, after removing the switch, there is no identification number on it, and the Lord in the store told me that without this number he would not look for me, so I am asking you for help.

    I only have rear fog lights in the switch, and the switches I found also have front fog lamps and halogen lights. I don't want to order blind because I don't know if it will work.

    So my question, if I buy a switch with front fog lights and halogens, will everything work as it should? Are you able to give me any ID number that will match mine?

    Audi A3 8L 1998 - Light Switch Replacement without Identification Number: Rear Fog Lights Only
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  • #2 16756415
    masay1
    Level 20  
    Posts: 247
    Help: 40
    Rate: 80
    8L1941531H; change from 01/10/2002 on 8L1941531HB98
    both will match ... but the new catalog number is the latter ...
    and it is according to you should search / order it ...

    Added after 7 [minutes]:

    aaaa ...
    from what I can see in the photo you uploaded it
    the light switch is probably from "Englishman"
    while the number I gave you is for the "continent"
  • #3 16756461
    Pawel.k20
    Level 7  
    Posts: 25
    Rate: 6
    I mean an overview photo from the net. Here is my EU.

    Thank you for your answer.
    Attachments:
    • Audi A3 8L 1998 - Light Switch Replacement without Identification Number: Rear Fog Lights Only IMG_20171014_095036.jpg (4.9 MB) You must be logged in to download this attachment.
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  • #4 16756485
    grala1
    VAG group specialist  
    Posts: 9812
    Help: 1495
    Rate: 5036
    If you buy from richer equipment, it will work so that, for example, to turn on the rear fog lamps, you will have to pull harder because the front fog lamps will be in the first position and the rear fog lamps in the second position. Of course, what is not in the car will not light up.
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  • #5 16757935
    Pawel.k20
    Level 7  
    Posts: 25
    Rate: 6
    Such a question, just to be sure.
    It's hard to find a switch with this part number, so I have a question if the switch with the number 8L1941531E will fit

    I am asking because I want to be sure there is the same wire connection in the cube, without any DIY.
  • #6 16758232
    masay1
    Level 20  
    Posts: 247
    Help: 40
    Rate: 80
    99% yes ...
    the number you give is probably the part number ...
    while I gave you the catalog number ... according to whose
    you can buy a new one ... but with stimulants it is not so easy,
    because at auctions they usually give part numbers ... and NOT catalog numbers ...
    no. catalog does not have to and is not always the same as no. parts ...
    but to the point;
    you wrote about the Lord in the shop; that's why I gave you no. catalog ...
    but now I see that you are going towards the stimulant, and with that I will not help you much ...
    but if the one you are going to buy has the same functional markings (holograms)
    and it is functional on the mechanical / electrical side, it will be Ok ...

    nice...
  • #7 16758242
    grala1
    VAG group specialist  
    Posts: 9812
    Help: 1495
    Rate: 5036
    Google the photos from the back as you want to be sure.
    Electrically, the Golf 4 switch fits there (it only has a different lighting dimmer).
    No matter if you have front fog lights or not, the plug is identical, it only has a different number of wires, so every switch will go there and the basic lighting will work.
  • #8 16759354
    Pawel.k20
    Level 7  
    Posts: 25
    Rate: 6
    I ordered a new one with the number 8L2941531H.
    I am writing this post for the next lost ones to read this post and learn more.
    Will it fit perfectly? I will write how it will be mounted.
  • #9 16759399
    Aleksander_01
    Level 43  
    Posts: 12626
    Help: 1150
    Rate: 3351
    I buy from skoda and they always fit.
  • #10 16766404
    Pawel.k20
    Level 7  
    Posts: 25
    Rate: 6
    Switch came on, everything works as it should.
    Thank you @ masay1 for help ;)
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  • #11 16766443
    masay1
    Level 20  
    Posts: 247
    Help: 40
    Rate: 80
    Oh please...

    nice...
  • #12 21522524
    Mariusz079
    Level 12  
    Posts: 177
    Rate: 38
    Good morning, will this switch fit electrically into an audi A2, it has a large block like mine but I don't know if I will burn something when I connect it to an audi a2 ?
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Topic summary

✨ The discussion addresses replacing a broken light switch in an Audi A3 8L (1998) without an identification number. The original switch controls only rear fog lights, while available replacements often include front fog lights and halogen light functions. It is confirmed that switches with additional functions will work correctly; the rear fog lights will activate by pulling the switch further, as front fog lights occupy the first position. The plug and wiring connections are compatible across variants, including switches from Golf 4, despite minor differences in lighting dimmer functionality. Catalog and part numbers differ: the catalog number 8L1941531HB98 (post-01/10/2002) is recommended for ordering, while part numbers like 8L1941531E are likely compatible if mechanical and electrical functions match. The switch with number 8L2941531H was successfully installed and fully functional. It is also noted that switches from Skoda fit without issues. A question about compatibility with Audi A2 was raised but not conclusively answered. Visual verification of the switch's rear connector is advised to ensure compatibility before purchase.
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FAQ

TL;DR: For the Audi A3 8L (1998), 2 catalog numbers were identified for the headlight switch and, as one expert put it, "both will match." [Elektroda, masay1, post #16756415]

Why it matters: This FAQ helps A3 8L owners replace a failed light switch confidently—especially when only rear fogs are present and no ID sticker exists.

Quick Facts

Which headlight switch part numbers fit a 1998 Audi A3 8L with only rear fog lights?

Catalog numbers 8L1941531H and 8L1941531HB98 were identified as matching for the A3 8L. The expert who provided them wrote, “both will match.” Choose the newer supersession when possible. [Elektroda, masay1, post #16756415]

Will a switch that has front fog light positions work if my car only has rear fogs?

Yes. Functionally, you’ll pull once for front fogs and twice for rear fogs; with no front fogs fitted, only the second detent activates the rear fogs. “What is not in the car will not light up.” [Elektroda, grala1, post #16756485]

Is there a real-world confirmation that 8L2941531H works?

Yes. A user installed a new switch labeled 8L2941531H and reported that everything worked as it should after fitting. That post closes the loop for owners seeking a drop-in solution. [Elektroda, Pawel.k20, post #16766404]

How do I replace the A3 8L headlight switch without an ID label? (3 steps)

  1. Compare the rear connector and detent icons to your old switch using seller photos. 2. Order a compatible A3 8L/Golf 4–type switch with matching markings. 3. Install; base lighting functions with the identical plug. “Google the photos from the back.” [Elektroda, grala1, post #16758242]

What’s the difference between a catalog number and a part number on these switches?

One poster clarified that sellers often list part numbers, while shops search by catalog numbers; they aren’t always identical. Buy by function and markings if numbers differ but the mechanism and connector match. [Elektroda, masay1, post #16758232]

Will 8L1941531E fit my A3 8L electrically?

The guidance given was “99% yes,” provided the unit is mechanically and electrically equivalent and carries the same functional icons. Quote: “If it has the same functional markings…it will be OK.” Verify the rear connector before purchase. [Elektroda, masay1, post #16758232]

Can I use a Golf 4 headlight switch in an A3 8L?

Yes. The Golf 4 switch fits electrically in the A3 8L; the plug is identical. Note that the illumination dimmer style can differ, but the base lighting will still operate. [Elektroda, grala1, post #16758242]

EU vs UK switch: does it matter for my 8L?

Yes. An expert noted the photographed unit looked like an “Englishman,” while the provided numbers were for the “continent.” Order the EU/LHD variant to match icon orientation and compliance. [Elektroda, masay1, post #16756415]

Any brand sourcing tips if I can’t find an Audi-boxed part?

One member buys compatible switches from Škoda parts counters and reports consistent fit. This can help when Audi or VW stock is scarce locally. [Elektroda, Aleksander_01, post #16759399]

Does the connector change if my car lacks front fogs?

No. The A3 8L uses the same plug regardless of fog equipment; unused positions simply remain unpinned. Base lighting functions once you connect the switch. [Elektroda, grala1, post #16758242]

What statistic from this thread should reassure me before ordering?

Two compatible catalog numbers were provided by an expert, and at least one successful installation was reported later. This indicates a high likelihood of success when matching connector and icons. [Elektroda, masay1, post #16756415]

Will an A3 8L switch fit electrically in an Audi A2 (8Z)?

This thread does not confirm A2 compatibility. Follow the advice to compare rear-connector photos and pinouts before trying, since platform wiring may differ. Use the back-photo check to avoid damage. [Elektroda, grala1, post #16758242]

Edge case: What can go wrong if I buy the wrong regional variant?

Icon orientation or compliance may not match, and you could receive a RHD/UK unit. The expert flagged this risk; order for the “continent” if your car is EU/LHD. [Elektroda, masay1, post #16756415]

Any sign that aftermarket listings without catalog numbers are OK?

Yes, if the unit matches by mechanism, connector, and icons. The advisor stressed that auctions list part numbers, not catalog numbers; buy by function and markings. [Elektroda, masay1, post #16758232]
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