Mazda MX-5 Miata / Grand Touring. Manual - part 28

Fig. 12: Identifying Special Tool To Power Brake Unit 
Courtesy of MAZDA MOTORS CORP. 

2. Apply a vacuum of 66.7 kPa {500 mmHg, 19.7 inHg} to the power brake unit using a vacuum gauge. 

NOTE:



Use any commercially available vacuum gauge. 

 

2008 Mazda MX-5 Miata Grand Touring 

2008 BRAKES Conventional Brake System - MX-5 Miata

  

Fig. 13: Applying Vacuum To Power Brake Unit Using Vacuum Gauge 
Courtesy of MAZDA MOTORS CORP. 

3. Using calipers, measure dimension L as shown in Fig. 14 . 

Standard L dimension  

30.4-30.6 mm {1.197-1.204 in}  

 

2008 Mazda MX-5 Miata Grand Touring 

2008 BRAKES Conventional Brake System - MX-5 Miata

  

Fig. 14: Measuring Dimension L Using Calipers 
Courtesy of MAZDA MOTORS CORP. 

4. If dimension L is not within the standard, remove the SST (49 G043 001) and, while stopping the push 

rod rotation with the SST (49 E043 003A), adjust the push rod length with the SST (49 B043 004).  

5. Switch the SSTs and remeasure dimension L. 

 

2008 Mazda MX-5 Miata Grand Touring 

2008 BRAKES Conventional Brake System - MX-5 Miata

  

Fig. 15: Adjusting Pushrod Length 
Courtesy of MAZDA MOTORS CORP. 

6. Install the master cylinder to the power brake unit.  

BRAKE FLUID LEVEL SENSOR INSPECTION 

1. Disconnect the brake fluid level sensor connector from the master cylinder.  

2. Inspect for continuity according to fluid level between the brake fluid level sensor terminals. 



If not as indicated in Fig. 16 , replace the reserve tank. 

 

2008 Mazda MX-5 Miata Grand Touring 

2008 BRAKES Conventional Brake System - MX-5 Miata