Ok.
Land Rover Discovery 4 airbag control unit repair
Land Rover Discovery 4 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?excluding VAT and 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(246)
Secure payment with
Matching part numbers
Your part number isn't listed? The list isn't complete – we can usually repair it anyway. Simply create a repair order, or ask us first.
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
- Land Rover
- Model
- Land Rover Discovery
- Series
- 4 (2009-2013)4 Facelift (2013-2017)
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 246 reviewsView all reviews →
Works like a charm!
Everything went perfectly, I can only recommend it.
Automatically translated · Original: German
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 light for the airbag). Today the message came from SWE, the car is running again, the red light is off and the HU was also passed. Once again many thanks for the help in need. Keep it up and maybe word will also spread in SWE that Airbag 24 does great work. Regards Gerd
Automatically translated · Original: German
Airbag control unit Fiat 500 was broken. Hard to believe but they can really repair it! Recommendation!!
Automatically translated · Original: German
Everything worked out great! Read out fault memory, sent it in, received offer and sent in the defective control unit. Got it back repaired after 3 days, price exactly as in the offer. It can't get any better 👍
Automatically translated · Original: German
What is a Land Rover Discovery 4 airbag control unit?
The Land Rover Discovery 4 airbag control unit is the central safety unit. It activates all occupant restraint systems in the event of an accident by processing sensor data and controlling the deployment of airbags and seatbelt pretensioners. This unit, also called the Restraint Control Module (RCM), is crucial to the passive safety of your Land Rover Discovery 4.
It serves as the brain of the safety system, receiving signals from crash sensors and triggering the appropriate airbags and seatbelt pretensioners as needed. Communication takes place via special airbag connectors that ensure a secure connection.
The control unit processes 12-volt vehicle electrical system voltage. During installation or removal, safety precautions such as disconnecting the battery must be observed.
Why is the Land Rover Discovery 4 airbag control unit faulty?
The Land Rover Discovery 4 airbag control unit primarily fails after an accident, as it stores immutable crash data. Internal electronic errors or software problems can also cause failure. This manifests itself in a permanently illuminated airbag warning light and the need for a professional Land Rover Discovery 4 airbag control unit repair.
After a collision, the system stores irretrievable crash data, preventing the module from being used again without special repairs. Even without an accident, aging or voltage fluctuations can damage internal components.
Messages like "internal error" in the control unit's error log indicate a malfunction within the unit itself. Such failures require precise diagnosis and professional Land Rover Discovery 4 airbag control unit repair.
Common error codes for Land Rover Discovery 4 airbag control unit repair
When repairing the Land Rover Discovery 4 airbag control unit, specific B-codes indicate malfunctions within the Restraints Control Module (RCM). These error codes affect the airbag deployment control and the system's plausibility checks, not external sensors or seatbelt pretensioners. A precise diagnosis of these codes is crucial.
- B0020-64 → Left Side Air Bag Deployment Control - Signal plausibility failure (RCM output switched off, but airbag installed) → Signal error / Internal RCM error
- B0020-95 → Left Side Airbag Deployment Control - Incorrect assembly → Incorrect assembly / wiring
- B0021-11 → Left Curtain Deployment Control 1 - Circuit short to ground → Short circuit to ground
- B0021-12 → Left Curtain Deployment Control 1 - Circuit short to battery → Short circuit to battery
- B0021-1A → Left Curtain Deployment Control 1 - Circuit resistance below threshold → Resistance too low / Cable break
- B0028-1A → Right Side Air Bag Deployment Control - Circuit resistance below threshold → Resistance too low / Cable break
- B0028-1B → Right Side Air Bag Deployment Control - Circuit resistance above threshold → Resistance too high / Cable break
- B0028-64 → Right Side Air Bag Deployment Control - Signal plausibility failure (RCM output switched off, but airbag installed) → Signal error / Internal RCM error
- B0028-95 → Right Side Airbag Deployment Control - Incorrect assembly → Incorrect assembly / wiring
- B0029-11 → Right Curtain Deployment Control 1 - Circuit short to ground → Short circuit to ground
Additionally, general messages such as "Crash data stored" or "Internal error" in the control unit's error log may indicate internal system problems. These also require professional Land Rover Discovery 4 airbag control unit repair.
What part numbers are available for the Land Rover Discovery 4 airbag control unit repair?
This repair product lists five part numbers for the Land Rover Discovery 4 airbag control unit. They belong to airbag control units of this model. The part number is printed on the label of your control unit, and you can state it in the repair order so the assignment stays clear.
The listed manufacturer numbers are AH22-14D374-AG, FH22 14D374 AC, LR018452, NNW502432 and NNW502436. All five numbers belong to airbag control units of the Land Rover Discovery 4.
Compare the number on the label of your control unit with this list before you submit the repair order.
This is how the professional Land Rover Discovery 4 airbag control unit repair is carried out
A professional Land Rover Discovery 4 airbag control unit repair includes reading the error log, erasing crash data, or correcting internal errors, and then reprogramming the module. This process restores the airbag system to full functionality and is a cost-effective alternative to purchasing a new one.
First, a detailed diagnosis is performed using specialized tools to determine the exact cause of the defect. This includes reading all stored error codes.
Repair includes erasing crash data, restoring components, and final error memory clearing. The repaired control unit retains its vehicle data and is functional immediately after installation.
Safety precautions, such as disconnecting the vehicle's battery before beginning work, are essential for safety during the Land Rover Discovery 4 airbag control unit repair. Only specialist workshops should perform this sensitive work.
Installation position of the Land Rover Discovery 4 airbag control unit
The Land Rover Discovery 4 airbag control unit is typically located inside the vehicle, usually centrally under the center console or in the passenger footwell. This protected location ensures the safety and integrity of the module against mechanical influences and moisture, which is important for the longevity of the unit.
The control unit is connected to yellow airbag connectors that link the module to the sensors and airbags throughout the vehicle. This distinctive color identifies safety components.
Extreme caution is required during installation and removal. Both battery cables should be disconnected, starting with the ground cable, to prevent short circuits or accidental airbag deployment.
Installation requires specialist knowledge and should only be performed by qualified personnel. This ensures the correct function of the system after the Land Rover Discovery 4 airbag control unit repair and avoids safety risks.
4.8
Based on 246 reviews
What our customers say
„Ok.“
Zsolt Szabólast week„Works like a charm!“
Leolylast month„Everything went perfectly, I can only recommend it.“
Automatically translated · Original: German
ka irgendwas3 days ago„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 fi…“
Automatically translated · Original: German
Gerd Goldammer3 days ago„Airbag control unit Fiat 500 was broken. Hard to believe but they can really repair it! Recommendation!!“
Automatically translated · Original: German
Christian Maegerlein5 days ago„Everything worked out great! Read out fault memory, sent it in, received offer and sent in the defective control unit. Got it back repaired after 3 days, price exactly as in the offer. It can't get any better 👍“
Automatically translated · Original: German
Toni Buien6 days ago„Uncomplicated service. Fast and thorough. Can only recommend.“
Automatically translated · Original: German
Abdul KS6 days ago„All great👍“
Automatically translated · Original: German
Edin Avdiclast week„All great, fast delivery. Thanks.“
Automatically translated · Original: German
Andrej Ivanovlast week„100% satisfied. Everything handled very professionally and transparently. Only the return shipping took too long. This was however due to UPS and less to Aairbag24. Thank you very much“
Automatically translated · Original: German
Dennis Welast week„VAG airbag control unit with error B2000 00 reliably repaired. Price very high in comparison, but everything worked out. No exact protocol of what was carried out, probably just newly flashed“
Automatically translated · Original: German
Tokeh Tokehlast week„A great shop, even when there are sometimes problems. There are quick responses and very good help. I can only recommend the shop. Thank you very much“
Automatically translated · Original: German
Sven Wegenerlast week„Ok.“
Zsolt Szabólast week
