Join Date: Oct 2008
Location: Isle of Skye
Car: 620SDi + 9 support Rovers
Even if VOSA do retrospectively invoke a catalyst check, this would probably not apply before 2004MY vehicles, in a similar way that it doesn't apply to the type-approval check on Petrols prior to 2001MY. My reasoning is that the 2001 threshold for Petrols aligns with the OBD emissions requirements, and these did not, and could not, apply before 2004 for Diesels. So it is likely that most Rovers/Landrovers would be exempt from type-approval checks on catalysts, therefore anything resembling a Diesel catalyst would suffice in the exhaust system.
For most of us, this means "Don't panic", ever.