The MINI Factory replacement Front Apron Cover, at the rear of the engine compartment near the base of the front windshield. This part includes the rubber strip that seals against the bottom of the windhield - the rubber strip is molded to the Apron.
This part is 'LEFT Side' or driver side on US cars, that covers the brake fluid reservoir.
Fits the following models:
2007-2013 R56 MINI Cooper and Cooper S Hardtop
2008-2014 R55 MINI Cooper and Cooper S Clubman
2009-2015 R57 MINI Cooper and Cooper S Convertible
The hardware for installing the apron a hex bolt and plastic nut for each side at the outer ends of the apron and you should be able to re-use the existing hardware. If you need to replace them, see the following: