Purpose/Function
The low and reverse brake stops the rotation of the front internal gear and rear planetary carrier while in 1GR and in reverse, locking them to the transaxle case.
Construction
The low and reverse brake consist of the following parts shown in the figure.

The driven plate of the low and reverse brake does not rotate because it is connected to the transaxle case.

The drive plate of the low and reverse brake is engaged with the low and reverse brake hub and front internal gear. Therefore, the rear planetary carrier is locked via the front internal gear.

For the low and reverse brake piston, a compact and highly reliable bonded seal piston has been adopted in which the piston and seal are molded together.
Operation
When hydraulic pressure is applied to the low and reverse brake piston, the drive plate and driven plate are pressure bonded to lock the front internal gear and rear planetary gear to the transaxle case.

General Procedures (Brake)
Master CylinderLight Bulbs
WARNING
Do not replace the xenon fusion bulbs yourself:
Replacing the xenon fusion bulbs yourself is dangerous. Because the xenon fusion
bulbs require high voltage, you could receive an electric shock if the bulbs are
handled incorrectly. Consult an Authorized Mazda Dealer when the replaceme ...
Fuel Tank Inspection
WARNING:
Fuel is very flammable liquid. If fuel spills or leaks from the pressurized
fuel system, it will cause serious injury or death and facility breakage. Fuel
can also irritate skin and eyes. To prevent this, always complete the “Fuel
Line Safety Procedure”, while referring ...
Front Body Control Module (Fbcm) Removal/Installation
CAUTION:
If configuration is not performed when the front body control module (FBCM)
is replaced with a new one, the vehicle specification information is not stored
in the front body control module (FBCM) and the system will not operate normally.
When performing configuration, ...