Cupra Leon airbag control unit repair⁽¹⁾

What should I know about Cupra Leon airbag control units?

The airbag control unit in the Cupra Leon evaluates the crash sensors, triggers the airbags and monitors the entire system. If it detects a fault, the airbag warning light comes on. Airbag24 repairs the control unit you send in and erases the crash data.

In an accident, the control unit triggers the airbags and belt tensioners. In the process it stores crash data and locks itself.

The airbag system is safety-critical. Work on it should therefore be left to a specialist workshop and not carried out yourself.

Which Cupra Leon generations are there?

Airbag24 distinguishes two series of the Cupra Leon: KL, built from 2020 to 2023, and KL Facelift, built since 2024. What matters is the series your vehicle belongs to.

The KL series denotes the model range before the facelift. The KL Facelift series comprises the updated model range, built since 2024 and still in production. Whether the airbag system changed with the facelift cannot be said in general terms; the part number on the control unit gives the exact version.

• KL (2020–2023): series before the facelift
• KL Facelift (since 2024): updated series, still in production

How do I identify my Cupra Leon airbag control unit?

The part number on the label of the control unit determines the exact version. The model year and equipment of your Cupra Leon help to assign the correct series.

The following part numbers are examples and do not claim to be complete:

• 1EA959655DQ
• 1EA959655EP

Fault codes known from checked sources include 00595 (crash data stored, impact registered), 01226 (crash data stored for the driver side) and U0151 (loss of communication with the airbag control unit). However, a single fault code does not prove a defect; only testing the unit shows the cause.

Which airbag equipment does the Cupra Leon have?

According to the available equipment information, the Cupra Leon is usually fitted with seven airbags. Whether a knee airbag or rear side airbags are also installed depends on trim level and market.

The basic equipment includes front airbags for driver and front passenger, a centre airbag between the front seats, front side airbags and head airbags. The airbag control unit coordinates these modules in a crash.

A driver's knee airbag is listed as standard in some sources and as optional in others. Rear side airbags are listed as optional. The exact equipment of your vehicle can be checked at the manufacturer or a dealer using the vehicle identification number (VIN).

Repair is carried out by mail-in procedure. First have the fault memory read out, disconnect the battery and remove the control unit, ideally with a specialist workshop. Then create an online repair request and send the unit in. Processing usually takes 3–4 working days: checking, repairing and testing. Whether a repair is possible becomes clear once the unit you send in has been checked.

The repaired control unit returns with all vehicle data and is immediately ready for use after reinstallation — no coding or programming is required.