Just had this happen on my 2019 Crossland x 1.2T auto, less than 25,000 miles covered, bought used. My clusters abrupt warning was a “Braking system failure, stop the engine”.
Currently at dealership, quoted at least £1500, but won’t have an exact figure until the engine is stripped.
Was advised to contact Vauxhall customer services, they may contribute towards the repair as a good will because it’s a common problem with this engine that Vauxhall are fully aware of. If it’s so common, they should be recalled.
Vauxhall won’t be contributing to my repair though, because of missing service history with approved workshops even though it’s the poor quality of parts fitted during the manufacturing process.