1990 BMW 525i hissing sound

160,000 MILES • 6 CYL • FWD • AUTOMATIC
Avatar
RYAN2000
  • MEMBER
  • 1 POST
theres a hissing sound came out under the hood
Feb 28, 2010 at 12:40 PM
Advertisement
Avatar
MHPAUTOS
  • ✓Experienced Mechanic
  • 31,937 POSTS
Hi there,

This will normally be a vacuum leak, you will have to get a mechanic to go over the induction and brake booster and check for a leak, start there.

mark (mhpautos)
Feb 28, 2010 at 1:04 PM
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Frequently Asked Problems for This Vehicle