Brake fluid quality
WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.
Use only original Volvo brake fluid with the (minimal) code DOT 4+. Never re-use brake fluid. Always store brake fluid in its original packaging, carefully closed.