The brake master cylinder might get contaminated by foreign material particles which come from the clutch slave cylinder sealing. These particles adhere to the brake master cylinder seals eventually causing an internal leakage on the brake master cylinder. This may cause no pressure in the brake system and a reduction in braking power where the brake pedal is applied slowly and constantly.
Opel Astra 1.6 Diesel with manual transmission (MY 2016 – 2018) are affected by this recall.
Company recall code: 18-C-120 (E181803130)
Source: Rapex Alert 2/2019 A12/2019/18