# 04 Navigator hissing

**URL:** <https://community.cartalk.com/t/04-navigator-hissing/51857>\
**Category:** Maintenance/Repairs\
**Tags:** lincoln, navigator\
**Created:** [July 15, 2010, 12:19am UTC](https://community.cartalk.com/t/04-navigator-hissing/51857 "2010-07-15T00:19:13Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![kianlo](https://avatars.discourse-cdn.com/v4/letter/k/67e7ee/32.png) [@kianlo](https://community.cartalk.com/u/kianlo)\
**Post date:** [July 15, 2010, 12:19am UTC](https://community.cartalk.com/t/04-navigator-hissing/51857/1 "2010-07-15T00:19:13Z")

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Hissing noise from driver’s side front. Stops when brake pedal slightly depressed. Brakes work GREAT. Just had new rotors put on. Air suspension fixed 12 months ago.

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**Author:** ![tardis](https://avatars.discourse-cdn.com/v4/letter/t/f0a364/32.png) [@tardis](https://community.cartalk.com/u/tardis)\
**Post date:** [July 15, 2010, 3:28am UTC](https://community.cartalk.com/t/04-navigator-hissing/51857/2 "2010-07-15T03:28:49Z")

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Sounds like a problem with the vacuum booster. You want to get this fixed before it gets worse and your lose power brakes.