1. Disconnect the negative battery cable..
2. Remove the rear combination light..
3. Remove the rear bumper..
4. Remove the nuts and remove the rear bumper reinforcement.

5. Install in the reverse order of removal.
Rear Bumper Disassembly/Assembly
Rear Bumper Removal/InstallationOil Seal (Differential) Replacement [C66 M R]
1. Remove the aerodynamic under cover No.2 and the splash shield as a single
unit..
2. Drain the manual transaxle oil..
3. Disconnect the drive shaft (LH) from the MTX..
4. Disconnect the drive shaft (RH) from the joint shaft..
5. Remove the joint shaft..
6. Remove the oil seal (LH).
...
Stop Vehicle in Safe Place Immediately
If any of the following warning lights turns on, the system may have a
malfunction. Stop the
vehicle in a safe place immediately and contact an Authorized Mazda Dealer.
...
Forced Ignition On [With Advanced Keyless Entry And Push Button Start System]
NOTE:
In order to perform a forced ignition ON, the M-MDS (IDS) is necessary. If
the servicing is being done outside of an Authorized Mazda dealership, contact
an Authorized Mazda dealership for instructions.
The forced ignition ON procedure forces a power supply to each part w ...