2026-11-03

副车架总成 - 后（拆卸和安装）

校正代码 30010201 2.22 NOTE: Unless otherwise explicitly stated in the procedure, the correction code and its associated FRT reflect all of the work required to perform this procedure, including the linked procedures. Do not stack correction codes unless explicitly told to do so. NOTE: See Flat Rate Times to learn more about FRTs and how they are created. NOTE: See 人员保护 to make sure wearing proper PPE when performing the below procedure. NOTE: See 人体工程学注意事项 for safe and healthy working practices.

  • 2026-11-02: Updated torque specifications.
  • 2026-01-29: Added photos to show how to position the subframe lifting tool.
  • 2025-12-12: Updated torque table and torque values shown in the procedure.
  • 2024-10-14: Updated torque spec for LH/RH shear plate-to-rear subframe large bolts.
Equipment:
  • 1134520-00-A 电子驻车制动 (EPB) 手动释放套件
  • 1129348-00-A XP-10 电源，XP-10
  • 1099645-00-B 副车架固定装置，Model 3
  • 1140311-00-A Lever Lock, HV Connector, Model 3

扭矩规格

Table 1. 扭矩规格: 副车架总成 - 后（拆卸和安装）
描述 扭矩值 推荐工具 重复使用/更换 备注
Bolts that attach the LH rear brake caliper bracket to the knuckle
83 Nm (61.2 lbs-ft)
  • 外梅花套筒 E18
更换
Bolts that attach the LH rear damper at the top mount
41 Nm (30.2 lbs-ft)
  • 15 毫米套筒
  • 3 英寸加长件
重复使用
Nut that attaches the rear drive unit ground strap to the body
10 Nm (7.4 lbs-ft)
  • 10 毫米 12 角深套筒
重复使用
Nuts that attach the HV battery to rear drive unit harness bracket to the HV battery
10 Nm (7.4 lbs-ft)
  • 10 毫米套筒扳手
  • 4 英寸加长件
重复使用
Small bolts that attach the LH shear plate to the HV battery
35 Nm (25.8 lbs-ft)
  • 13 mm 套筒
  • 3 英寸加长件
重复使用
Large bolt that attaches the LH shear plate and rear subframe to the body
125 Nm (92.2 lbs-ft)
  • 21 毫米套筒
  • 6 英寸加长件
更换
Bolts that attach the rear subframe to the body
160 Nm (118.0 lbs-ft)
  • 21 毫米套筒
  • 6 英寸加长件
更换

拆卸

  1. Raise and support the vehicle. See 举升车辆 - 双柱举升机.
  2. Open all doors and lower the windows.
  3. Release the parking brakes. See 驻车制动 - 钳 - 后 - 左侧（释放）.
  4. Remove the 2nd row lower seat cushion. See 座椅座垫 - 下部 - 第二排（拆卸和更换）.
  5. Remove the rear underhood apron. See 前备箱挡板 - 后部（拆卸和更换）.
  6. Disconnect 12V power. See 12V/低压电源（断开和连接）.
  7. Perform the vehicle electrical isolation procedure. See 车辆高压禁用程序.
  8. Remove the LH and RH rear wheels. See 轮毂（拆卸和安装）.
  9. Remove the LH and RH suspension cover. See 护罩 - 后悬架 - 左侧（拆卸和更换）.
  10. Remove the mid aero shield panel. See 面板 - 流线型护板 - 后部（拆卸和更换）.
  11. Remove the rear fascia diffuser. See 扩散器 - 后饰板（拆卸和更换）.
  12. Remove the nut that attaches the rear drive unit ground strap to the body.
    Tip
    推荐使用以下工具
    • 10 毫米 12 角深套筒
  13. Remove and discard the bolt that attaches the LH rear brake caliper bracket to the knuckle, and then hang the caliper bracket on the body with an S-hook. Repeat this step on the RH rear brake caliper.
    Tip
    推荐使用以下工具
    • 外梅花套筒 E18
  14. Install a spring compressor onto the LH rear coil spring.
    Tip
    推荐使用以下工具
    • Gedore 弹簧压缩器
  15. Remove the bolts (x2) that attach the LH rear damper to the top mount.
    Tip
    推荐使用以下工具
    • 15 毫米套筒
    • 3 英寸加长件
  16. Repeat steps 14 and 15 on the RH rear damper.
  17. Disconnect the electrical harness from the LH 12V subframe connectors.
  18. Release the clip that attaches the LH subframe electrical harness to the body.
  19. Repeat steps 17 and 18 on the RH side of the vehicle.
  20. Remove the rear stabilizer bar. See 平衡杆 - 后（拆卸和更换）.
  21. Remove the rear HV battery skid plate. See 滑板 - 高压电池 - 后部（拆卸和更换）.
  22. Position a coolant drain container under the LH rear of the HV battery.
  23. Disconnect the rear drive unit inverter inlet hose from the LH rear side of the HV battery, and then plug the male and female fittings.
  24. Position the coolant drain under the RH rear of the vehicle.
  25. Release the push clips (x2) that attach the RH rear wheel liner to the rocker panel.
  26. Release the clip, disconnect the rear drive unit coolant outlet hose to powertrain return hose, and then plug the male and female fittings.
  27. Remove the coolant drain container from under the vehicle.
  28. Remove the nut that attaches the HV battery to rear drive unit harness bracket to the HV battery.
    Note
    The number of fasteners may vary.
    Tip
    推荐使用以下工具
    • 10 毫米套筒扳手
    • 4 英寸加长件
  29. Slide the release to unlock the HV battery rear drive unit connector handle of the rear drive unit to HV battery harness from the secured position.
  30. Fully raise the handle on the HV battery rear drive unit connector, and then remove the HV battery rear drive unit connector from the HV battery header.
  31. Position the subframe lifting tool under the rear subframe.
  32. Attach an air hose to the subframe lifting tool.
  33. With an assistant, raise the subframe lifting tool to support the rear subframe.
  34. Loop the straps over the rear subframe, hook the ends of the straps to the metal rings, and then pull the straps tight to restrain the subframe to the rear subframe lifting tool.
    Note
    Lower the vehicle to give more slack to connect the straps to the rings, if necessary.
  35. Mark the LH and RH rear subframe bolts for realignment during re installation.
    Note
    You can also mark the LH and RH subframe casting and subframe bushing to the body.
  36. Release the fir tree clips that attach the coolant hoses to the LH shear plate.
  37. Remove the smaller bolts that attach the LH shear plate to the HV battery.
    Tip
    推荐使用以下工具
    • 13 mm 套筒
    • 3 英寸加长件
  38. Remove the larger bolt that attaches the LH shear plate and rear subframe to the body, and then remove the LH shear plate.
    Tip
    推荐使用以下工具
    • 21 毫米套筒
    • 6 英寸加长件
  39. Repeat step 36 through step 38for the RH shear plate.
  40. Remove and discard the bolts (x2) that attach the rear subframe to the body.
    Tip
    推荐使用以下工具
  41. With an assistant, slowly lower the subframe lifting tool to remove the rear subframe from the vehicle.
    CAUTION
    Take care not to damage HV harnesses and coolant hoses during lowering of the subframe.
  42. Disconnect the air supply from the rear subframe lifting tool.
  43. Move the rear subframe and subframe lifting tool away from the vehicle.

安装

  1. Position the subframe lifting tool and rear subframe underneath the vehicle.
  2. Connect the air line to the subframe lifting tool.
  3. With an assistant, slowly raise the rear drive unit and subframe into position.
    CAUTION
    Take care not to damage HV harnesses and coolant hoses while lifting the rear subframe.
  4. Hand-tighten new bolts (x2) that attach the rear subframe to the body.
    Note
    The tightening of the bolts will be performed later in this procedure.
  5. Install the LH shear plate to the rear subframe and HV battery, and then hand-tighten a new bolt to attach the shear plate to the subframe.
    Note
    The tightening of the bolt will be performed later in this procedure.
  6. Install and hand-tighten the smaller bolts that attach the LH shear plate to the HV battery.
    Note
    The tightening of the bolts will be performed later in this procedure.
  7. Repeat steps 5 and 6 on the RH shear plate.
  8. Position the subframe to the locations as marked during removal.
    Note
    Return the subframe to its original position as closely as possible.
  9. Torque the bolts that attach the LH and RH rear subframe to the body, and then mark them with a paint pen after torquing.
    Tip
    推荐使用以下工具
    160 Nm (118.0 lbs-ft)
  10. Torque the smaller bolts that attach the LH and RH shear plates to the vehicle.
    35 Nm (25.8 lbs-ft)
    Tip
    推荐使用以下工具
    • 13 mm 套筒
    • 3 英寸加长件
  11. Torque the large bolts that attach the LH and RH shear plates to the vehicle, and then mark them with a paint pen after torquing.
    125 Nm (92.2 lbs-ft)
    Tip
    推荐使用以下工具
    • 21 毫米套筒
    • 6 英寸加长件
  12. Fasten the fir tree clips that attach the coolant hoses to the LH and RH shear plates.

    LH shear plate shown, RH shear plate similar

  13. Release the straps and lower the subframe lifting tool from the vehicle.
  14. Disconnect the air line from the subframe lifting tool, and then remove the tool from underneath the vehicle.
  15. Fully raise the handle on the HV battery rear drive unit connector of the rear drive unit to HV battery harness.
  16. Install the HV connector special tool onto the HV battery rear drive unit connector.
  17. Use both hands to firmly connect the HV battery rear drive unit connector of the rear drive unit to HV battery harness to the HV battery header.
    CAUTION
    Make sure that the connector fits the header squarely and tightly, and that both retention pins enter the handle.
  18. Remove the HV connector special tool from the HV battery rear drive unit connector.
  19. While pressing the HV battery rear drive unit connector onto the HV battery header, fully lower the handle.
    CAUTION
    Make sure that the handle does not bind as it is lowered.
  20. Slide the release to lock the HV battery rear drive unit connector handle in the secured position.
  21. Verify that the HV battery rear drive unit connector is fully seated, and compare both sides of the connector that it is properly secured in place.
    Note
    An improperly seated connector might lead to connector damage and rear drive unit problems later on.
  22. Install the nuts (x2) that attach the rear drive unit HV electrical harness bracket to the HV battery.
    10 Nm (7.4 lbs-ft)
    Tip
    推荐使用以下工具
    • 10 毫米套筒扳手
    • 4 英寸加长件
    Note
    The number of fasteners might vary on newer vehicles.
  23. Position the coolant drain beneath the RH rear of the HV battery.
  24. Remove the hose plugs, connect the rear drive unit outlet hose to the powertrain return hose, and then fasten the clip.
    CAUTION
    Perform a push-pull test to verify that the hose is fully seated.
  25. Position the coolant drain beneath the LH rear of the HV battery.
  26. Remove the plugs from the male and female fittings, connect the rear drive unit inverter inlet hose to the LH side of the HV battery, and then fasten the clip.
    CAUTION
    Perform a push-pull test to verify that the hose is fully seated.
  27. Fasten the barrel clip that attaches the rear drive unit inverter inlet hose to the HV battery.
  28. Remove the coolant drain container from underneath the vehicle.
  29. Install the rear HV battery skid plate. See 滑板 - 高压电池 - 后部（拆卸和更换）.
  30. Install the rear stabilizer bar. See 平衡杆 - 后（拆卸和更换）.
  31. Fasten the LH subframe electrical harness barrel clip to the body.
  32. Connect the electrical connector for the LH of the 12V subframe harness.
    Figure 1. LH side shown, RH similar
  33. Repeat steps 31 and 32 on the RH side of the vehicle.
  34. Install the ground strap for the rear drive unit.
    10 Nm (7.4 lbs-ft)
    Tip
    推荐使用以下工具
    • 10 毫米 12 角深套筒
    Note
    Reinstall the washer if the vehicle had this washer during removal.
    Note
    Make sure that the angle of the ground strap provides enough clearance between the ground strap wire and the ABS wheel speed sensor wiring harness.
  35. Install the bolts that attach the LH rear damper at the top mount.
    41 Nm (30.2 lbs-ft)
    Tip
    推荐使用以下工具
    • 15 毫米套筒
    • 3 英寸加长件

    LH shown; RH similar.

  36. Remove the spring compressor from the LH rear coil spring.
  37. Install the LH rear suspension cover. See 护罩 - 后悬架 - 左侧（拆卸和更换）.
  38. Repeat steps 35 through 37 on the RH side of the vehicle.
  39. Install the LH and RH rear brake caliper bracket onto the knuckle, and then install the bolts that attach the caliper bracket to the knuckle.
    83 Nm (61.2 lbs-ft)
    Tip
    推荐使用以下工具
    • 外梅花套筒 E18

    LH rear brake caliper shown, RH rear brake caliper similar.

  40. Check the torque for any rear suspension bolts that were loosened while the rear subframe assembly was removed from the vehicle and torque as required. See 悬架 - 后部（检查扭矩）.
  41. Install the rear fascia diffuser. See 扩散器 - 后饰板（拆卸和更换）.
  42. Install the lower clips that attach the LH and RH wheel arch liner.
  43. Install the mid aero shield panel. See 面板 - 流线型护板 - 后部（拆卸和更换）.
  44. Install the LH and RH rear wheels. See 轮毂（拆卸和安装）.
  45. Connect 12V power. See 12V/低压电源（断开和连接）.
  46. Press and hold the Park button on the gear selector to release the EPB service mode.
  47. 通过“维护模式”或 Toolbox 执行以下例行程序（请参阅0005 - 维护模式）： TEST-SELF_VCFRONT_X_THERMAL-PERFORMANCEvia Service Mode:Thermal ➜ Actions ➜ Test Thermal Performancevia Service Mode Plus:
    • Drive Inverter ➜ Front Drive Inverter Replacement ➜ Thermal System Test
    • Drive Inverter ➜ Rear Drive Inverter Replacement ➜ Thermal System Test
    • Drive Inverter ➜ Rear Left Drive Inverter Replacement ➜ Thermal System Test
    • Drive Inverter ➜ Rear Right Drive Inverter Replacement ➜ Thermal System Test
    • Drive Unit ➜ Front Drive Unit Replacement ➜ Thermal System Test
    • Drive Unit ➜ Rear Drive Unit Replacement ➜ Thermal System Test
    via Toolbox:(link)
  48. Inspect the coolant level and top off as necessary, and then install the coolant bottle cap.
    Note
    Ensure that the coolant level is at the "MAX" line.
  49. Install the cabin intake duct. See 槽 - 上部 - 驾驶室进气（拆卸和更换）.
  50. Install the rear underhood apron. See 前备箱挡板 - 后部（拆卸和更换）.
  51. Install the 2nd row lower seat cushion. See 座椅座垫 - 下部 - 第二排（拆卸和更换）.
  52. Restore the driver and front passenger seats back to their original position.
  53. Refer to the Alignment Requirement tables to determine whether an EPAS alignment check (EC) or four wheel alignment check (AC) is necessary. If performed, add the alignment check/adjust correction code as a separate activity to the SV. See 定位要求 - 悬架.