Used Mercedes-Benz A-Class Airbag Control Module

The W169 A-Class ran from 2004 to 2012, so both a 2005 and a 2008 car are within the same generation, which is a good starting point for compatibility. However, because the airbag control module must match the specific SRS system configuration of your car, you should confirm compatibility against your registration with the breaker before buying. Never guarantee fitment on safety-critical parts like this.

The W168 ran from 1997 to 2004 and the W169 from 2004 to 2012 — these are entirely separate generations with different SRS system architectures, so a module from one will not be a straightforward swap into the other. Even within the same generation, airbag module compatibility with a specific car's SRS system needs to be confirmed with the breaker against your registration. Do not attempt to cross generations with this part.

The airbag control module itself is not directly determined by trim level — it is the generation and the specific SRS system fitted to your car that matters most. That said, higher trim levels on the A-Class (such as AMG Line or Executive on the W176/W177) may have additional sensors, seat-mounted airbags, or pretensioner variants that could affect which module is compatible. Always confirm the exact module against your registration with the breaker to account for any trim-related differences in your car's SRS setup.

In principle the door count can affect the SRS system because the number of monitored circuits may differ between body styles, so it is worth mentioning your body style to the breaker when requesting a quote. The W169 A-Class was offered in both 3-door and 5-door forms, so there are cars of each type in the breaker network. Confirm compatibility against your registration rather than assuming a module from the other body style will work.

Airbag control modules are single-use components: once the system has deployed, the module stores a crash record and in most cases cannot be reused or reset without specialist equipment, and even then it may not be legal or safe to do so. You will almost certainly need a replacement unit from a breaker, and it must be correctly coded or configured for your car's SRS system. Because airbags and seatbelt pretensioners are safety-critical, professional fitting by a qualified technician is strongly recommended — do not attempt a DIY install.

The W176 ran from 2012 to 2018 (with a facelift in 2015) and the W177 launched in 2018, making these separate generations with different electrical architectures — so a direct swap is very unlikely to work. Because airbag module compatibility is also tied to the specific SRS system fitted to your individual car, you should always confirm the part against your registration with the breaker. This is a safety-critical part, so do not assume cross-generation compatibility.