Works like a charm!
Mercedes-Benz EQT W420 airbag control unit repair
Mercedes-Benz EQT W420 airbag control unit repair at Airbag24
Airbag24 repairs defective airbag control units professionally and affordably. Both private customers and workshops can order without registration and benefit from fast processing, 2 years' statutory liability for defects and plug&play installation.
Airbag24 works with state-of-the-art diagnostic technology and specialised repair processes. Because defective control units often involve only individual components, a professional overhaul can be considerably cheaper than buying new.
Our advantages: no registration required, a direct online ordering process for B2B and B2C customers, express shipping and comprehensive quality testing. The repaired control unit works like a new part.
Notes
Mounting position
Repair type
Which repair matches your fault code?incl. VAT plus shipping
Not sure? Just send us an enquiry or give us a call — we're happy to advise you.
4.8Google reviews of our shop(233)
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Repair time
Our estimated repair time for this product is about: 3–4 business days
Which repair matches your fault code?
Below your code you can see what needs to be done.
Your error code isn't listed? The list isn't complete – we can usually repair it anyway. Simply create a repair order, or ask us first.
Specifications
- Make
- Mercedes-Benz
- Model
- Mercedes-Benz EQT
- Series
- W420 (2022-XXXX)
Shipping & repair from Germany
Airbag24 repairs your component in Berlin — usually within 3–4 working days.
Standard shipping within Germany is free; we normally return your part by UPS.
You pay for and insure the inbound shipment to us. On explicit request we ship by express — the extra cost is borne by the customer.
If you withdraw from the contract, you bear the cost of returning the item.
Google reviews
4.8Based on 233 reviewsView all reviews →
Airbag control unit Fiat 500 was broken. Hard to believe but they can really repair it! Recommendation!!
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From the first phone call, the order processing, to the shipping, everything was done very quickly and professionally. Now I still have to send the repaired unit to the Swedish workshop and then hopefully the Honda can finally pass the HU there again (failed because of the red airbag light). Thanks to Airbag 24 in Berlin 👍👏. Gerd
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Fast repair and fast shipping Simply top
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Everything works great
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Ultra fast delivery, fit really well in the end. There was even a pen and gummy bears included. :D Definitely again, thank you very much!
Automatically translated · Original: German
What is a Mercedes-Benz EQT W420 airbag control unit?
The airbag control unit is the central control unit of the restraint system (SRS) in the Mercedes-Benz EQT W420. It evaluates the signals from the crash sensors and, in an accident, decides within milliseconds which airbags and seatbelt pretensioners deploy. It also monitors the system continuously and reports faults via the airbag warning light.
A typical sign is an airbag warning light that does not go out after starting, or an entry in the fault memory that cannot be cleared. The control unit is fitted in the Mercedes-Benz EQT W420 (since 2022).
After an accident, the unit stores crash data and locks itself. This also applies when no airbag has deployed.
Why is the Mercedes-Benz EQT W420 airbag control unit defective?
The most common cause is crash data stored after an accident, even if no airbag has deployed. Ageing electronic components, cold solder joints, moisture and corrosion on connectors, and voltage spikes are also possible causes.
Stored crash data cannot be cleared with an ordinary diagnostic tool. The control unit therefore remains in a fault state.
Voltage spikes occur, for example, with a weak battery or when jump-starting. Electronic components age over the years, and contact problems can develop at solder joints. If moisture gets in, connectors corrode and disrupt signal transmission.
Typical signs are a permanently lit airbag warning light, a fault memory that cannot be cleared, and a diagnostic tool that cannot connect to the control unit.
Common error codes for Mercedes-Benz EQT W420 airbag control unit repair
The error codes for the Mercedes-Benz EQT W420 point to different kinds of faults: internal faults of the control unit, communication problems, deviations in the supply voltage, interruptions in squib circuits and stored crash data.
The following codes occur on this vehicle. The list is a selection and is not exhaustive.
- B1000 → General fault in the airbag control unit
- B2500 → Internal fault of the control unit
- B1561 → Crash data stored in the control unit
- U0151 → Communication with the airbag control unit lost
- B1315 → Voltage at the control unit too low
- B1318 → Voltage at the control unit too high
- B1420 → Open circuit in the driver airbag squib circuit
- B1421 → Open circuit in the passenger airbag squib circuit
Error codes are read out with a diagnostic tool. A code alone does not prove that the control unit is defective, because connectors, wiring or an airbag module can also be the cause. Only testing the unit shows where the fault actually lies.
What part numbers are available for the Mercedes-Benz EQT W420 airbag control unit repair?
The part number is printed on the label of the control unit and determines the exact version. Within a model series there are different numbers depending on equipment and year of manufacture, so it is worth checking the label before sending the unit in.
There is no reliable list of numbers for the Mercedes-Benz EQT W420. Please read the number from the label of your removed unit and enter it in the repair order. This makes it clear which version it is.
First have the fault memory read out, then disconnect the battery. Remove the control unit, create a repair order online and send the unit in.
Processing at Airbag24 usually takes 3–4 working days and covers checking, repairing and testing your unit. The repaired control unit comes back with all vehicle data and is ready for use as soon as it is refitted — no coding or programming is required.
4.8
Based on 233 reviews
What our customers say
„Works like a charm!“
Leoly3 weeks ago„Airbag control unit Fiat 500 was broken. Hard to believe but they can really repair it! Recommendation!!“
Automatically translated · Original: German
Christian Maegerleinlast week„From the first phone call, the order processing, to the shipping, everything was done very quickly and professionally. Now I still have to send the repaired unit to the Swedish workshop and then hopefully the Honda can f…“
Automatically translated · Original: German
Gerd Goldammerlast week„Fast repair and fast shipping Simply top“
Automatically translated · Original: German
Andreas Foxlast week„Everything works great“
Automatically translated · Original: German
Wolfgang Katenzlast week„Ultra fast delivery, fit really well in the end. There was even a pen and gummy bears included. :D Definitely again, thank you very much!“
Automatically translated · Original: German
Tim Hammer2 weeks ago„I drive a W210 estate. My control unit was broken and because of that I couldn't go to TÜV. I was recommended Airbag24 from a forum. I sent in my control unit. Unfortunately everything was a bit under time pressure and I…“
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Franz Dampf2 weeks ago„Motorhome Fiat Ducato. Fault airbag lamp lit permanently, could also not be reset after reading it out. Fault was permanently present. Quick friendly contact with Airbag24, described the fault, known problem was the stat…“
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Rene Larisch2 weeks ago„Professionals are at work here, any additional repairs that may arise are carried out without complaint and without discussion...always happy to come back.“
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Manfred Gunia3 weeks ago„From the order to the repair everything worked well, airbag control unit installed, the light goes off again as it should, good service, fast repair and return shipping. Thanks 👍👍👍“
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Petra3 weeks ago„Got the second airbag control unit from you for another car. Fits, no more error message. Great service Can only recommend. Super fast delivery, and they keep what they promise. A big thank you to this company.“
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Mama 43 weeks ago„Super fast service and repair Fast processing“
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Dennis Baron4 weeks ago„Works like a charm!“
Leoly3 weeks ago
