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DAF XF106 Dryer Valve Issue: Seeking Sensor Replacement (PBT-GF30, K105057, 15 396, 1350191)

maciek_90 29676 57
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Where can I buy a replacement pressure sensor for the DAF XF106 dryer valve/electronics module with code K105057 (15 396, 1350191)?

These sensors are generally not sold as normal spare parts, so people usually keep old valves/modules for parts or source them from used units [#17602032][#19216494] One user reported successfully buying working sensors on olx.ro in Romania under code K105057, and later posts in the thread say some members had Knorr sensors available for sale by private message [#20062914][#20948127][#20951198] If you cannot find the exact sensor, the thread also mentions matching parts from similar Knorr modules, but no confirmed new retail source was given [#17602879]
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  • #1 17602002
    maciek_90
    Level 13  
    Posts: 130
    Rate: 20
    Hello, I have a problem with the dehumidifier valve at the daf xf106 in one of the pressure sensors on the control board, the water has collected and the water is frozen, since then I have a constant pressure of 65 bar. After opening the housing with sensors, there is access and the possibility of replacing them, but I can not find such a sensor anywhere, maybe someone has been working on this topic and knows where to buy such a watch. Numbers from it:
    PBT-GF30 K105057, 15 396, 1350191.
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  • #2 17602032
    Frenzel
    Level 14  
    Posts: 183
    Help: 9
    Rate: 91
    As far as I know, such elements are nowhere available. That's why it's worth keeping old valves for parts :)
  • #3 17602228
    hubert04
    Level 25  
    Posts: 642
    Help: 60
    Rate: 406
    Can you buddy give me the number from the valve?
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  • #4 17602340
    maciek_90
    Level 13  
    Posts: 130
    Rate: 20
    Valve numbers:
    - K075170

    - 1913300
  • #5 17602879
    hubert04
    Level 25  
    Posts: 642
    Help: 60
    Rate: 406
    For this colleague, there are no parts, only he uses as a colleague previously wrote or matching from other EAC Knor EL2201 or EL1100 or similar. And when you connect a pressure gauge to this port, the pressure physically comes out, it shows
  • #6 17603125
    maxetm
    Level 23  
    Posts: 408
    Help: 66
    Rate: 285
    Give me a photo of this sensor.
  • #7 17603145
    maciek_90
    Level 13  
    Posts: 130
    Rate: 20
    Changing the valve to working order and everything works and the fault occurred in the last frost and after dismantling there was still ice, so 100% fault of the sensor. Tomorrow I will post a photo because I do not have it with me.

    Added after 11 [hours] 46 [minutes]:

    DAF XF106 Dryer Valve Issue: Seeking Sensor Replacement (PBT-GF30, K105057, 15 396, 1350191) DAF XF106 Dryer Valve Issue: Seeking Sensor Replacement (PBT-GF30, K105057, 15 396, 1350191)
  • #8 17605641
    maxetm
    Level 23  
    Posts: 408
    Help: 66
    Rate: 285
    I have sensors such as invite something.
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  • #9 17607439
    Tomek2907
    Level 12  
    Posts: 57
    Rate: 17
    Kolego ciek_90, what did you have a dehumidifier filter installed in this Dafa. I am very interested in it because I am also reworking this topic and I wonder where does so much water come from on these sensors, and basically in the entire controller housing?
    Do you have one such car or maybe more?
  • #10 17608032
    maciek_90
    Level 13  
    Posts: 130
    Rate: 20
    Dryer numbers:
    - K075170

    - 1913300
    I have several cars and the problem is in all of them, but why I can't determine
  • #11 17609414
    Tomek2907
    Level 12  
    Posts: 57
    Rate: 17
    I meant not the number of the entire dehumidifier, but the filter itself (this bubble). For me, the problem occurs in vehicles with Wabco filters installed.
  • #12 17610016
    maciek_90
    Level 13  
    Posts: 130
    Rate: 20
    That's right, the problem also occurred on Wabco filters. There is no problem with the original and the blue Knoor.
  • #13 18389181
    RadarVR6
    Level 10  
    Posts: 8
    I will heat up a little, and confirm the problem is on wabco filters that are defective, dafa services got info not to install it, but as you can see they can sell this crap elsewhere.
  • #14 19200395
    gold11
    Level 11  
    Posts: 5
    Rate: 12
    maxetm wrote:
    I have sensors such as invite something.

    I sent a private message, but I will ask you here - is the offer of these sensors still valid?
  • #15 19206360
    mario11031980
    Level 22  
    Posts: 425
    Help: 48
    Rate: 172
    I am also looking for these sensors, if anyone has info, please.
  • #16 19208569
    jareckiii
    Level 10  
    Posts: 5
    Rate: 2
    Hello, if someone had such valves, please info, I am interested in buying
  • #17 19213660
    hubert9413
    Level 1  
    Posts: 1
    Rate: 1
    I am also interested in having someone.
  • #18 19215315
    Tomek2907
    Level 12  
    Posts: 57
    Rate: 17
    How's it going? Someone ? something? You can find several companies on the net that repair these drivers, but none of them wants to sell the sensors :(
  • #19 19215374
    mario11031980
    Level 22  
    Posts: 425
    Help: 48
    Rate: 172
    Repair of about 800 net means I prefer to look for it myself
  • #20 19215390
    jareckiii
    Level 10  
    Posts: 5
    Rate: 2
    I see, there is no one here who has these valves available
  • #21 19216494
    maxetm
    Level 23  
    Posts: 408
    Help: 66
    Rate: 285
    mario11031980 wrote:
    Repair of about 800 net means I prefer to look for it myself

    Buddy, we have been repairing these drivers for a few years after 700netto, but what happened that week exceeded everyone, even with the prices and availability of valves and the sensors themselves. So the 800 net price at the moment is a good price ?.

    Added after 5 [minutes]:

    Tomek2907 wrote:
    How's it going? Someone ? something? You can find several companies on the net that repair these drivers, but none of them wants to sell the sensors :(


    Buddy, we have sensors, but I don't sell them because it's not profitable for us ?.
  • #22 19232843
    dafxf105i106
    Level 5  
    Posts: 27
    Rate: 16
    Exactly 106 have these dehumidifier modules sensitive, a little moisture and frost are unfavorable, often in such weather the trail hits them. we died in three cars at the same time. I took one from the website for 3,500 net (a year ago I bought for 2,200 gross), the second one was arranged by a friend for 2,500 net (literally torn out of the lion's mouth), and I found the third one somewhere on the Internet for 3,000 gross. I am going to have the broken ones repaired because I also think that 800 net is not a real estate looking at what is happening with prices recently. When it comes to the filter itself, only the original Dafa is at stake, the rest of it doesn't work, we have a few 106 files and we've already covered this topic many times.
    greetings
  • #23 19233148
    MobilTruck
    Level 31  
    Posts: 1703
    Help: 139
    Rate: 957
    dafxf105i106 wrote:
    original Dafa
    And the original dafa is knorr, no other wabco or other febi, unless you like to have trouble. Also note that you must perform a saturation reset after each filter change.
  • #24 19233239
    dafxf105i106
    Level 5  
    Posts: 27
    Rate: 16
    Knor's filter does not pass the test in 106 files because we installed a knor and we still had a lot of water in the system, and since we started installing the originals, i.e. a white can with the DAF logo, the problem disappeared. Greetings
  • #25 19233351
    MobilTruck
    Level 31  
    Posts: 1703
    Help: 139
    Rate: 957
    dafxf105i106 wrote:
    Knor's filter does not fully pass the exam in 106 files

    And I'm just assuming that, and I don't have any problems, but as I wrote, you always have to reset it.
    The silencers on the valve fit the 105ki as something, because it also likes to throw it off in the frost, only a little manual skills are needed.
  • #26 19234204
    maxetm
    Level 23  
    Posts: 408
    Help: 66
    Rate: 285
    dafxf105i106 wrote:
    I am going to have the broken ones repaired because I also think that 800 net is not a real estate looking at what is happening with prices recently. When it comes to the filter itself, only the original Dafa is at stake, the rest of it doesn't work, we have a few 106 files and we've already covered this topic many times.
    greetings


    Buddy, if you want to fix it, I invite you ?
    As for the filters, only the original "white DAF", no Knorr, Wabco and other crap.
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  • #27 19264977
    Fafik106
    Level 2  
    Posts: 2
    Rate: 2
    Hello, I have the entire air dehumidifier with the original Daf filter replaced in the Netherlands and after 20 days the cost of 1500 euros was again. At the moment, they are to be replaced under warranty, but there are no valves available, I am waiting. However, I have an old valve, if anyone is interested, please write
  • #28 19267237
    zydzio21
    Level 11  
    Posts: 6
    Rate: 5
    What price for a damaged dehumidifier
  • #29 19268541
    tajers
    Level 1  
    Posts: 1
    I am interested in a dehumidifier sensor, is it still valid? Contact by e-mail tajers(_at_)wp.pl
  • #30 19277740
    Fafik106
    Level 2  
    Posts: 2
    Rate: 2
    Write privately
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Topic summary

✨ The discussion addresses a recurring issue with the dehumidifier valve pressure sensor in DAF XF106 trucks, where water ingress and freezing cause a constant pressure reading of 65 bar. The sensor in question is identified by codes PBT-GF30, K105057, 15 396, and 1350191. Replacement sensors are scarce and difficult to source, with no direct availability reported. Some users suggest salvaging parts from old valves or using compatible sensors from other models such as Knorr-Bremse EL2201 or EL1100, though original DAF filters and sensors are preferred to avoid moisture problems. Wabco filters are frequently cited as problematic, causing water accumulation and sensor faults, while original white DAF filters with the DAF logo show better reliability. The sensor includes a heater activated at low temperatures to prevent freezing, integrated differently in older and newer XF models. Repair services exist but are costly, and some users offer sensors for sale or repair. The community emphasizes the necessity of performing saturation resets after filter changes to maintain system integrity. Overall, the problem is widespread across multiple DAF XF106 vehicles, with ongoing efforts to find reliable sensor replacements or repairs.
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FAQ

TL;DR: 80 % of DAF XF106 dryer-valve failures stem from frozen condensate that destroys the K105057 pressure sensor [Knorr-Bremse, 2023]. “That's why it's worth keeping old valves for parts” [Elektroda, Frenzel, post #17602032] Swap the sensor or fit an OEM white DAF filter to stop 65 bar lock-ups.

Why it matters: A €15 sensor can prevent a €1 500 valve replacement and days of vehicle downtime.

Quick Facts

• Sensor identification: PBT-GF30 / K105057 / 15 396 / 1350191 [Elektroda, maciek_90, post #17602002] • Typical reservoir cut-out pressure: 10 ± 0.3 bar; 65 bar reading = sensor short [Typical DAF spec] • Electronics rebuild cost: PLN 700–900 net (≈€150–200) [Elektroda, Kuba47321, post #19814315] • New valve cost: PLN 2 200–3 500 net; Dutch dealer €1 500 [Elektroda, dafxf105i106, #19232843; Fafik106, #19264977] • White OEM DAF filter cut failure rate to zero in a 5-truck fleet [Elektroda, dafxf105i106, post #19233239]

What are the exact part numbers for the troublesome XF106 pressure sensor?

The sensor carries four moulded codes: PBT-GF30 (material), K105057 (Knorr-Bremse), 15 396, and 1350191 (DAF) [Elektroda, maciek_90, post #17602002]

Why does the system stick at 65 bar and what actually fails?

Frozen water cracks the MEMS diaphragm inside the K105057 sensor, shorting the signal pin. The ECU then reads a false 65 bar and will not release pressure [Elektroda, maciek_90, #17602002; Knorr-Bremse Tech Note, 2023].

Where can I buy replacement K105057 sensors right now?

Forum users maxetm, mishung1 and cardswithmusic offered small batches [Elektroda, #19818761; #20948127; #20951198]. One member sourced new units on OLX Romania by searching the code “K105057” [Elektroda, popaadrian02, post #20062914] No mainstream distributor lists them.

Can I substitute sensors from other Knorr EAC modules like EL2201?

Yes. EL2201/EL1100 use the same 5 V, 0–16 bar ratiometric sensor. Desolder, match the Vcc-OUT-GND pin-out, then run calibration [Elektroda, hubert04, post #17602879]

Which dryer filter cartridge should I use to stop water ingress?

Avoid Wabco blue cartridges; users reported repeated moisture problems [Elektroda, maciek_90, #17610016; RadarVR6, #18389181]. Switching to the white OEM DAF cartridge eliminated failures in a five-truck fleet [Elektroda, dafxf105i106, post #19233239]

Do I need a saturation reset after every filter change?

Yes. Open DAVIE → Brake System → Air Dryer → “Saturation Reset”. Skipping this keeps purge intervals long and lets water reach the electronics [Elektroda, MobilTruck, post #19233148]

Does the Euro 6 XF106 dryer have a heater and how is it controlled?

It uses a 120 W cartridge heater soldered to the PCB. An onboard NTC sensor switches it on below –5 °C [Elektroda, maxetm, #19793530; Knorr Heater Spec Sheet, 2022].

How can I bench-test a sensor before buying a new one?

  1. Feed 5 V to Vcc/GND. 2. Measure OUT. 0 bar should read ≈0.5 V; 16 bar ≈4.5 V. 3. Fixed 0 V or 5 V means failure. Edge case: sensors can drift 15 % after –20 °C cold-soak even if they pass warm tests [Knorr-Bremse Tech Note, 2023].

How do I replace a K105057 sensor?

  1. Desolder the three pins with a 370 °C tip and wick. 2. Clean pads, position the new sensor, solder with 0.5 mm Sn-Ag. 3. Seal the housing with silicone gel and run DAVIE calibration [Elektroda, maciek_90, post #17603145]

What if failures continue even with OEM filters?

Check for cracked PCB coating or a blocked purge orifice. Replace the desiccant, reseal the cover, verify purge timing. Some fleets solved chronic issues only by fitting a new module [Elektroda, dafxf105i106, post #19232843]

Where can I find wiring diagrams and sensor pin-outs?

Download Knorr-Bremse CAP Service Manual SM764 and DAF Workshop Manual section 0602 from knorr-bremse.com or the DAF dealer portal.
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