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Subaru Legacy BM Airbag Control Unit Repair
Subaru Legacy BM 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
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Repair type
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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.
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
- Subaru
- Model
- Subaru Legacy
- Series
- BM (2009-2014)

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
4.8What is a Subaru Legacy BM airbag control unit?
The Subaru Legacy BM airbag control unit is the central safety unit that activates all occupant restraint systems, such as airbags and seatbelt pretensioners, in the event of an accident. It continuously monitors all relevant sensors, stores important crash data, and ensures the proper functioning of the entire restraint system for maximum vehicle safety.
This module, also known as the Restraint Control Module (RCM), is specifically designed for the Subaru Legacy BM model (model years approximately 2009–2014). It receives and processes signals from various impact and seat occupancy sensors.
Based on this information, the control unit decides whether and when to deploy airbags. An integrated self-diagnosis function continuously monitors the system status and activates the airbag warning light if necessary.
Why is the Subaru Legacy BM airbag control unit defective?
A Subaru Legacy BM airbag control unit often fails because it stores irretrievable crash data after an accident. Internal electronic errors due to aging or overvoltage can also cause failure. This makes a Subaru Legacy BM airbag control unit repair necessary to clear the airbag warning light and restore vehicle safety.
After an impact, the control unit stores indelible crash information. This data prevents further use of the module without a professional reset or replacement.
Other causes of failure include short circuits, age-related material fatigue, or software errors. A defective control unit typically triggers the airbag warning light and can generate error messages in the on-board computer.
A precise diagnosis at a qualified workshop is crucial to identify the exact cause. Only then can a decision be made whether a repair or replacement is advisable.
Common error codes for Subaru Legacy BM airbag control unit repair
In Subaru Legacy BM Airbag Control Unit Repair, certain trouble codes directly indicate problems with the control unit itself, rather than with sensors or other components. The most common DTCs are B1000 for communication errors, and B1872 and B1877, which indicate general internal malfunctions of the airbag control unit.
- B1000 → Meaning: Control unit communication error → Cause: Internal malfunction of the airbag ECU or wiring problems to the ECU.
- B1872 → Meaning: Error in the airbag system – control unit detected → Cause: Internal defects in the airbag control unit itself.
- B1877 → Meaning: Airbag system fault – control unit detected → Cause: General fault in the airbag system that can be traced back to the control unit.
These specific error codes for the Subaru Legacy BM airbag control module indicate a defect in the module. They narrow down the troubleshooting process and are crucial for a precise diagnosis.
If one of these errors is present, an inspection of the control unit is essential. In many cases, a Subaru Legacy BM airbag control unit repair is the more cost-effective alternative to replacement.
What part numbers are available for the Subaru Legacy BM airbag control unit repair?
For the Subaru Legacy BM airbag control unit repair, several part numbers are stored for this product. The manufacturer part numbers are 98221AJ030, 98221AJ110 and 98221AJ010. These numbers belong to airbag control units of this model and help assign the correct unit for the repair.
The supplier part numbers from Denso are 150300-2151 and 150300-4650, also stored for this product. More suitable numbers can be found in the part number list on this page.
The part number is shown on the label of the airbag control unit and can be stated in the repair order.
Based on 246 reviews
What our customers say
„Ok.“
„Works like a charm!“
„Everything went perfectly, I can only recommend it.“
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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 fi…“
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„Airbag control unit Fiat 500 was broken. Hard to believe but they can really repair it! Recommendation!!“
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„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 👍“
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„Uncomplicated service. Fast and thorough. Can only recommend.“
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„All great👍“
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„All great, fast delivery. Thanks.“
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„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“
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„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“
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„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“
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„Ok.“



