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Rear CROSSMEMBER Removal/Installation (2WD): Notes

WARNING: This page is about a different car, the 2018 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
  • Verify that the rear crossmember is securely supported by a jack. If the rear crossmember falls off, it can cause serious injury or death, and damage to the vehicle.
CAUTION:
  • Performing the following procedures could cause an open circuit in the rear ABS wheel-speed sensor wiring harness if it is pulled by mistake. Before servicing, disconnect the rear ABS wheel-speed sensor and set it aside so that the wiring harness will not be pulled by mistake.
NOTE:
  • Mark the position before removing the rear upper arm.
  • Align the rear crossmember and rear upper arm markings when installing the rear upper arm.
  • Tighten the rear upper arm inner bolt completely before installing the rear crossmember component to the vehicle.
  1. Switch the ignition ON (engine off).
  2. Release the electric parking brake.
  3. Switch the ignition off.
  4. Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  5. Remove the wheels and tires. (See WHEEL AND TIRE REMOVAL/INSTALLATION .)
  6. Disconnect the rear ABS wheel-speed sensor wiring harness and the electric parking brake motor gear unit connector and set it aside so that it does not interfere with the servicing.
    Fig 1: Disconnecting Rear ABS Wheel-Speed Sensor Wiring Harness And Electric Parking Brake Motor Gear Unit Connector
    G12233912Courtesy of MAZDA MOTORS CORP.
  7. Jack up the vehicle to the unloaded condition, and support the rear lower arm using a jack.
    Fig 2: Lifting Up Rear Lower Arm Using Jack
    G09785635Courtesy of MAZDA MOTORS CORP.
  8. Align the rear crossmember component and rear upper arm and mark them.
    Fig 3: Aligning Rear Crossmember Component And Rear Upper Arm With Mark
    G12184704Courtesy of MAZDA MOTORS CORP.
  9. Remove the following parts: (See FLOOR UNDER COVER REMOVAL/INSTALLATION .)
    1. Floor under cover No. 2
    2. Floor under cover No. 1
  10. Remove the fasteners and bolt in the order shown in the figure.
    Fig 4: Floor Under Cover Fasteners And Bolt Tightening Sequence
    G12233915Courtesy of MAZDA MOTORS CORP.
  11. Remove the insulator.
  12. Remove the following parts: (See EXHAUST SYSTEM REMOVAL/INSTALLATION [SKYACTIV-G 2.5 (WITHOUT CYLINDER DEACTIVATION)] .) (See EXHAUST SYSTEM REMOVAL/INSTALLATION [SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION)] .) (See EXHAUST SYSTEM REMOVAL/INSTALLATION [SKYACTIV-G 2.5T] .)
    1. Brace bar
    2. Tunnel member
  13. For SKYACTIV-G 2.5 (Without cylinder deactivation) or SKYACTIV-G 2.5T vehicles, perform the following procedure.
    1. Disconnect the HO2S connector and the wiring harness clip.
      Fig 5: Disconnecting HO2S Connector And Wiring Harness Clip
      G12233916Courtesy of MAZDA MOTORS CORP.
    2. Remove the TWC. (See EXHAUST SYSTEM REMOVAL/INSTALLATION [SKYACTIV-G 2.5 (WITHOUT CYLINDER DEACTIVATION)] .) (See EXHAUST SYSTEM REMOVAL/INSTALLATION [SKYACTIV-G 2.5T] .)
  14. For SKYACTIV-G 2.5 (With cylinder deactivation) vehicles, perform the following procedure.
    1. Disconnect the connector and the wiring harness clip.
      Fig 6: Disconnecting Connector And Wiring Harness Clip
      G12233917Courtesy of MAZDA MOTORS CORP.
    2. Remove the bolt.
    3. Disconnect the HO2S connector and the wiring harness clip.
      Fig 7: Disconnecting HO2S Connector And Wiring Harness Clip
      G12233916Courtesy of MAZDA MOTORS CORP.
    4. Remove the TWC. (See EXHAUST SYSTEM REMOVAL/INSTALLATION [SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION)] .)
  15. Remove the following parts:
    1. Rear lateral link (See REAR LATERAL LINK REMOVAL/INSTALLATION .)
    2. Rear coil spring (See REAR COIL SPRING REMOVAL/INSTALLATION .)
    3. Rear lower arm (See REAR LOWER ARM REMOVAL/INSTALLATION .)
  16. Disconnect the rear upper arm from the hub support. (See REAR UPPER ARM REMOVAL/INSTALLATION (2WD) .)
  17. Remove the plate.
    Fig 8: Removing Plate
    G12233919Courtesy of MAZDA MOTORS CORP.
  18. Remove in the order indicated in the table.
  19. Install in the reverse order of removal. (See Suspension Links Installation Note .)
  20. Inspect the wheel alignment and adjust it if necessary. (See REAR WHEEL ALIGNMENT .)
    Fig 9: Inspecting Wheel Alignment
    G12233920Courtesy of MAZDA MOTORS CORP.
    COMPONENT DESCRIPTION

    1 Rear crossmember component
    (See Rear Crossmember Component Removal Note .)
    (See Rear Crossmember Component Installation Note .)
    2 Rear stabilizer component
    3 Rear upper arm
    (See REAR UPPER ARM REMOVAL/INSTALLATION (2WD) .)
    4 Rear crossmember mudguard
    5 Rear crossmember
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