Not only cars with disc brakes use brake boosters, they are also widely used in vehicle with drum brake systems, to ensure safety without compromise.
Brake Booster for BMW X5 2007 - 2013 TRW PSA139
Brake Booster for BMW 750Li 2006 - 2008 TRW PSA122
Acuum Power Brake Booster For BMW X5 L6 3.0L & V8 4.4L 4.6L 4.8L 2000-06 53-2941
Vacuum Power Brake Booster For BMW E53 X5 2000 2001 2002 2003-2006 34331165715
TRW 34336779742 / SA 920 Power Brake Booster for BMW 525i E63 E64 E60 E61
New Vacuum Power Brake Booster for BMW E53 X5 2000 2001 2002 2003 2004 2005 2006