Mercedes-Benz EQB Horn Replacement Parts

Yes, the EQB is a fully electric vehicle but it is still fitted with a conventional 12V horn, just like any other car on UK roads — the high-voltage drive system has no bearing on this. The EQB also has a separate Acoustic Vehicle Alerting System (AVAS) for low-speed pedestrian warning, but that is a distinct component from the standard horn. If you are looking for a replacement horn, breakers who have dismantled an EQB should be able to supply one.

The EQB was introduced to the UK market in 2022 and has remained in the same generation throughout its production run to date, without a significant facelift that is known to have changed the horn mounting or wiring. In practice the horn is a simple 12V component and is likely consistent across the production run, but because the EQB is a relatively new and evolving model you should confirm with the breaker against your specific registration before buying. Never assume fitment without that check.

No — the horn is not related to the drive system or motor output, so the variant of EQB the donor car came from should not affect whether the horn fits your vehicle. All EQB variants share the same basic electrical architecture for ancillary components like the horn. Confirm the part number with the breaker against your registration as a final check, but the powertrain variant is not a meaningful filter here.

Trim level does not affect horn fitment on the EQB; the horn is the same functional component regardless of whether the donor car was a Sport, AMG Line, or Premium. You may find minor differences in how wiring looms are routed in higher-spec vehicles, but the horn unit itself is interchangeable across trims. Ask the breaker to confirm the part number matches your registration if you want extra reassurance.

The GLB shares the same MFA2 platform as the EQB and uses very similar electrical systems, so the horn may well be compatible — Mercedes commonly uses shared components across platform siblings. However, because the EQB is an all-electric variant with some differences in its 12V system layout, you should confirm with the breaker whether the part number from a GLB donor matches what is needed for your EQB registration. Do not fit without that confirmation.

These are two separate parts: the horn is the traditional audible warning device operated by the steering wheel button, while the AVAS (Acoustic Vehicle Alerting System) is a legally required pedestrian warning speaker that activates automatically at low speeds. If your problem is that other road users cannot hear your car at slow speeds or when reversing, you likely need the AVAS unit rather than the horn. Tell the breaker which symptom you have and they can point you to the correct part from a donor EQB.