1999 Saturn SL Brake Pedal Goes to Floor

SATURN
Avatar
LJLJ
  • MEMBER
  • 1 POST
I have a 1999 Saturn SL with 75000+ miles. When I got in to my car I press on the brake and the brake peddle went clear to the floor. I pumped it once and got the resistance back. I released the parking brake and backed out, went about 25 yards to the street and stepped on the brake, the peddle went clear to the floor again. I stopped with the parking brake. I drove home and when I got home the brakes worked fine. The brake fluid is fine and no leaks and the brake drums weren't hot to the touch when I got home. What could cause this problem?
ljlj
Mar 3, 2006 at 8:22 AM
Advertisement
Avatar
PEPPERMRJ
  • ✓Experienced Mechanic
  • 1,158 POSTS
Only 2 possibilities.
One, a leak in the hydraulic system allowing fluid out and air in.
Two, a bad mastercylinder.

I vote for number one.
How far was the ride home?
Where the front wheels warm/hot?

If I had to guess from what you desribed. I would take a close look at the rear wheel cylinders. Out of sight and out of mind. Pull the drums and peel the rubber cap on the wheel cylinder back. If it is wet inside it leaks. Rebuild or replace. Do both sides even if you only find 1 side wet.

Good luck and let us know. :)
Mar 3, 2006 at 9:44 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.

Suggested Repair

Inspect the rear wheel cylinders for hidden leaks by pulling the drums and peeling back the rubber caps. If either side is wet inside, rebuild or replace both wheel cylinders. If no leak is found, suspect a failing master cylinder or air entering the hydraulic system.

Conversation Summary

The owner of a 1999 Saturn SL with over 75,000 miles reported the brake pedal dropping to the floor, briefly recovering after pumping, failing again, then working normally later. Fluid level was fine, no visible leaks were found, and the drums were not hot. The expert said the cause is either a hydraulic leak letting fluid out and air in, or a bad master cylinder, and recommended checking the rear wheel cylinders first and servicing both sides if one is wet.

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.

Ask a new question

Frequently Asked Problems for This Vehicle