Brake Fluid Seepage from Brake Master Cylinder Tank Cap – 2007-2015 Mazda CX-9

2007-2015 CX-9 – BRAKE FLUID SEEPAGE FROM BRAKE MASTER CYLINDER RESERVE TANK CAP

APPLICABLE MODEL(S)/VINS

2007-2015 CX-9

 

Brake fluid seepage from the brake master cylinder reserve tank cap.

 

The upper surface of the reserve tank may appear dusty or dirty where the brake fluid seepage has occurred.

This concern may be caused by a decrease in sealing performance of cap due to aging deterioration. A new cap with improved sealing performance has been established as a service part.

 

REPAIR PROCEDURE

  1. Wipe off all the brake fluid, dirt and debris from the brake master cylinder reserve tank.
  2. Remove existing cap.
  3. Install a new service part cap.

 

PART(S) INFORMATION

Part NumberDescriptionQty.Notes
TDY2-43-55YCap1

 

Prestone AS800Y DOT 4 Brake Fluid, Synthetic, High Grade, 50,000 Mile, 12 oz.
  • 50,000 mile fluid life
  • Prevent overheating & brake fade with high grade formula
  • Protects against performance decline due to water absorption; prevents corrosion of all metals within the braking system
  • Synthetic, extended fluid life formula
  • Size: 12 oz.

Last update on 2026-06-16 / Affiliate links / Images from Amazon Product Advertising API


 

Motul RBF 600 Brake Fluid DOT 4 – Racing & High Performance 100% Synthetic Brake Fluid for Cars & Motorcycles, Track Day, Street & Performance Applications 500ml
  • For hydraulic actuated brake and clutch systems
  • Non-silicone synthetic fluid
  • Extreme thermal resistance and stability
  • Increase braking performance and avoid brake fade
  • Helps reduce vapour lock with wet boiling point of 399°F (204°C)

Last update on 2026-06-16 / Affiliate links / Images from Amazon Product Advertising API


 

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