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  • Oil pressure sensor - NLA and what to do

    I was researching into oil pressure sensors (for a guage - not a lamp) on the B6 S4 and discovered that the 035 919 561 fitted to the 3B/ABY/ADU is well and truly NLA.

    This is the bigger/chunky 2-pin sensor that is wired onto ABY as follows:
    'G' - black/white - 0..5 bar based on variable resistance - G10 on schematics

    'WK' - blue/black - this is a n/c (normally closed) switch that OPENS with pressure above 0.3bar - F22 on schematics


    In conjunction with the hybrid F22/G10 unit, we have 056 919 081 E as a single pin (n/o) switch that CLOSES when oil pressure exceeds 1.8bar - this is 'F1' on the schematics connected to a white/grey wire.

    Both devices have an M10x1.0mm threaded fitting on the left side of the block.

    The problem we have is that an alternative to the NLA part looks to be 035 919 561 A - this was fitted to many an old Golf and Audi engine (including KW, MB, NG, KV, NM & 7A), BUT it has a different setup on the switch side which prevents 'plug and play' operation.

    The switch 'WK' side of the 035 919 561 A part is actually the 1.8bar n/o switch... so on S2/RS2 we will get false oil pressure warnings as the logic is back to front on our autocheck system.

    The FIX is to swap the switch wiring around on the ABY and fit an alternative to the 1-pin switch in the F1 position as 028 919 081 D (or H) - these are 0.3bar n/c switches what get wired to the blue/black wire so that Autocheck behaves correctly.

    If that isn't clear for anyone, I shall create a lil diagram !
    Paul Nugent
    Webmaster http://S2central.net
    Administrator http://S2forum.com

    1994 S2 Coupe ABY - aka Project Lazarus
    2001 A6 allroad 2.5TDi - family tank
    2003 S4 Avant 4.2 V8 - daily burble

    Purveyor of HomeFries and Exclusive agent for Samco hose kits (S2/RS2)

    There are only 10 kinds of people that understand binary - those that do, and those that don't

  • #2
    I got one very recently from quattro corner, OE and same part number 035 919 561.

    But this fix can save us in the future, good work Paul
    1996 S2 ABY Silver

    Comment


    • #3
      Pete maybe has some of the last OE items available then - just be especially careful when sourcing aftermarket replacements - the most popular application will be on old Golfs and they will be 'wrong' for the S2/RS2 and need the fix described above.
      Paul Nugent
      Webmaster http://S2central.net
      Administrator http://S2forum.com

      1994 S2 Coupe ABY - aka Project Lazarus
      2001 A6 allroad 2.5TDi - family tank
      2003 S4 Avant 4.2 V8 - daily burble

      Purveyor of HomeFries and Exclusive agent for Samco hose kits (S2/RS2)

      There are only 10 kinds of people that understand binary - those that do, and those that don't

      Comment


      • #4
        I used a aftermarket VDO unit. Its the same spec except M10x1 taper thread:


        http://www.s2forum.com/forum/showthr...+sender&page=2
        Panthero Coupé quattro 20vt
        Indigo ABY coupé
        Imola B6 S4 Avant

        Comment


        • #5
          Good info thanks for posting

          Comment


          • #6
            Originally posted by S2central.net View Post
            I was researching into oil pressure sensors (for a guage - not a lamp) on the B6 S4 and discovered that the 035 919 561 fitted to the 3B/ABY/ADU is well and truly NLA.

            This is the bigger/chunky 2-pin sensor that is wired onto ABY as follows:
            'G' - black/white - 0..5 bar based on variable resistance - G10 on schematics

            'WK' - blue/black - this is a n/c (normally closed) switch that OPENS with pressure above 0.3bar - F22 on schematics


            In conjunction with the hybrid F22/G10 unit, we have 056 919 081 E as a single pin (n/o) switch that CLOSES when oil pressure exceeds 1.8bar - this is 'F1' on the schematics connected to a white/grey wire.

            Both devices have an M10x1.0mm threaded fitting on the left side of the block.

            The problem we have is that an alternative to the NLA part looks to be 035 919 561 A - this was fitted to many an old Golf and Audi engine (including KW, MB, NG, KV, NM & 7A), BUT it has a different setup on the switch side which prevents 'plug and play' operation.

            The switch 'WK' side of the 035 919 561 A part is actually the 1.8bar n/o switch... so on S2/RS2 we will get false oil pressure warnings as the logic is back to front on our autocheck system.

            The FIX is to swap the switch wiring around on the ABY and fit an alternative to the 1-pin switch in the F1 position as 028 919 081 D (or H) - these are 0.3bar n/c switches what get wired to the blue/black wire so that Autocheck behaves correctly.

            If that isn't clear for anyone, I shall create a lil diagram !
            Hi Paul , how do you mean it should be done ?? I think i have exactly this problem on my car. Could you make somkind of easier diagram ?? Thanks a lot.

            Comment


            • #7
              https://shops.audi.com/de_DE/web/tra...-035919561a-10

              Comment


              • #8
                I did find an aftermarket one that worked correctly. It's somewhere in my Nothelle thread.
                Nothelle S2 Avant
                Black Ur project
                Ocianic Ur project gone
                S2 Coupe project gone
                Urs6 plus project gone

                Comment


                • #9
                  ok ,, but if i can switch wires and make it work , its better then 100 euro

                  Comment


                  • #10
                    https://www.s2forum.com/forum/welcom...0-owner/page75
                    Nothelle S2 Avant
                    Black Ur project
                    Ocianic Ur project gone
                    S2 Coupe project gone
                    Urs6 plus project gone

                    Comment


                    • #11
                      FCP euro sell aftermarket ones. I have an FAE one and it works perfectly.

                      https://www.fcpeuro.com/Parts/?keywords=035%20919%20561

                      Comment


                      • #12
                        i saw all the pages ,, ufff,, great info ,,, thanks a lot.

                        Comment


                        • #13
                          Originally posted by le mans View Post
                          FCP euro sell aftermarket ones. I have an FAE one and it works perfectly.

                          https://www.fcpeuro.com/Parts/?keywords=035%20919%20561
                          I can find FAE in sweden and if they work i can go with them ,,, great ...

                          Comment


                          • #14
                            This should work ??
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                            • #15
                              This thread gives an alternative solution of fitting a "T". With that in place you can fit an individual oil pressure switch with an individual oil pressure sensor.

                              https://www.s2forum.com/forum/techni...ght#post927753

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