2025-08-04
Drive Unit - Rear (Tri Motor) (Remove and Replace)
Correction code
4001093132
3.78
NOTE: Unless otherwise explicitly stated in the procedure, the above correction code and 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. To provide feedback on FRT values, email ServiceManualFeedback@tesla.com.
NOTE: See Personal Protection to make sure wearing proper PPE when performing the below procedure.
Warning
This procedure is a DRAFT.
Although it has been validated, Warnings and Cautions might be missing. Follow safety
requirements and use extreme caution when working on or near High Voltage systems and
components. Provide corrections and feedback to ServiceDevelopment@teslamotors.com.
Warning
Cybertruck electronics are powered by a 48V "mid voltage" or "MV" architecture that is designed to improve efficiency. Servicing MV components requires extra knowledge and care in order to avoid personal and/or vehicular harm. Read and understand MV precautions in Electrical Precautions and make sure any required MV-related training courses have been completed, as applicable.
- Open the LH front door and lower the LH front window.
- Open the powered frunk.
- Raise and support the vehicle. See Raise Vehicle - 2 Post Lift.
- Place the vehicle into Service Mode. See Service Mode.
- Unlock the vehicle Gateway. See Gateway (Unlock).
-
Deflate rear axle air springs via Service UI
NoteService > Chassis > Suspension > Service > Deflate > REAR_AXLE, click Run, close once routine passed
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Access rear drive unit replacement panel via Service Mode Plus UI
NoteControls > Service Mode > High Voltage > Procedures > Rear Drive Unit Replacement
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Run 'Start Coolant Fill/Drain' routine
NoteVia Rear Drive Unit Replacement Dashboard, Ensure result is 'Passed'
-
Run 'Release Emergency Parking Brake' routine
NoteVia Rear Drive Unit Replacement Dashboard, Ensure result is 'Passed'
- Remove the rear underhood apron. See Underhood Apron - Rear (Remove and Install).
- Disconnect MV power. See Disconnect MV Power (Modify).
- Remove the LH and RH rear wheels. See Wheel Assembly (Remove and Install).
-
Disconnect RH rear EPB harness
Note1x connector, Release locking tab
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Release RH rear brake line from upper control arm
Note1x bolt, 10mm, 10 Nm
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Remove RH rear brake caliper and set aside
Note2x bolts, 21 mm, 150 Nm, Hang caliper from body if not fully removing, Route caliper hose so that it does not get caught on stabar assembly
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Remove RH rear brake rotor
NoteRotor will be loose until caliper is installed
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Use jack to simulate ride height on RH rear suspension
NoteRaise jack to simulate ride height, This is to release tension from the upper control arm which will be removed next later steps, DO NOT skip this you run into the risk of hurting yourself
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Remove RH rear toe link from RH rear knuckle
Note1x nut, 21mm, 170 Nm, Counter hold ball joint, Discard nyloc nut after removal
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Remove nut securing RH rear upper control arm to knuckle
Note1x nylon nut, 21 mm, 150 Nm, Discard nut after removal, Place support stand below suspension to ease removal
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Use jack to lower RH rear ride height back to hanging position
NoteLower jack to let suspension hang
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Release harness from RH rear air spring module
Note2x connectors, 1x grommet
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Remove RH rear lower control arm aeroshield
Note3x bolts, 10mm, 7 Nm
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Remove nuts securing RH rear air spring module to lower control arm
Note2x nylon nut, 21 mm, 140 Nm, Discard nuts after removal
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Disconnect EPB harness connector from LH rear brake caliper
Note1x connector, Release locking tab
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Release LH rear brake line from upper control arm
Note1x bolt, 10mm, 10 Nm
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Remove LH rear brake caliper and set aside
Note2x bolts, 21 mm, 150 Nm, Hang caliper from body if not fully removing, Route caliper hose so that it does not get caught on stabar assembly
-
Remove LH rear brake rotor
NoteRotor will be loose until caliper is installed
-
Use jack to simulate ride height on LH rear suspension
NoteRaise jack to simulate ride height, This is to release tension from the upper control arm which will be removed next later steps, DO NOT skip this you run into the risk of hurting yourself
-
Remove LH rear toe link from LH rear knuckle
Note1x nut, 21mm, 170 Nm, Counter hold ball joint, Discard nyloc nut after removal
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Remove nut securing LH rear upper control arm to knuckle
Note1x nylon nut, 21 mm, 150 Nm, Discard nut after removal, Move brake hose aside to avoid damage, Use caution when releasing rear upper control from knuckle
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Use jack to lower LH rear ride height back to hanging position
NoteLower jack to let suspension hang
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Release harness from LH rear air spring module
Note2x connectors, 1x grommet
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Remove LH rear lower control arm aeroshield
Note3x bolts, 10mm, 7 Nm
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Remove nuts securing LH rear air spring module to lower control arm
Note2x nylon nut, 21 mm, 140 Nm, Discard nuts after removal
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Raise vehicle fully
NoteSet to a comfortable working height, Lower to locks, Ensure locks engage on both sides to prevent tilting
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Remove Mid-aero shield
Note6x clips, 3x bolts, 15mm, 42 Nm, 5x bolts, 13mm, 28 Nm, 2x bolts, 10mm, 6 Nm
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Remove rear aero shield
Note5x bolts, 10mm, 6 Nm, 2x guides
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Remove rear diffuser
Note6x bolts, 10mm, 6 Nm, 8x bolts, T30, 6 Nm, 6x clips, 6x harness secure clips, 16x tabs
- Remove all items from pockets and ensure not wearing metal items
-
Inspect HV insulating gloves
NoteCheck gloves for damage prior to use, Refer to service document TN-15-92-003
- Put on HV insulating gloves and leather over gloves
-
Remove clips securing AC compressor HV harness
Note3x clips
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Verify no HV - Install amp clamp to RDU HV harness
NoteVerify meter is zeroed out before performing measurement, Measure single cable. Verify ammeter is installed in correct direction. If current > 0.5A do not proceed with disconnecting HV connector. In this case, start vehicle electrical isolation again to make sure that all was properly shut down. If current < 0.5A, Ok to disconnect and check voltage at HV plug on the battery side.Release locking tab and rotate the release lever up to disengage the connector, Release harness clip, Do not force the release lever up, Ensure the alignment tabs on the RDU header are not damagedMake sure to wear PPE (HV gloves, safety glasses) when working on high voltage component, Measure B+ to Ground, B- to Ground, B+ to B-, If voltage is greater than 10V, Pack contactors are not open or welded, Stop work
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Disconnect RDU HV harness
Note1x connector, Release locking tab and rotate release lever up, Do not force release lever up, Ensure alignment tabs on header are not damaged
- Remove leather over gloves and HV insulating gloves
- Position coolant drain container underneath RH rear of HV battery
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Remove front lower clips securing RH rear wheel arch liner
Note3x clips
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Disconnect RDU return hose from PT return hose
Note1x spring clip, 1x clamp clip, Move wheel liner aside as needed, Plug coolant connections as needed
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Disconnect RDU supply hose from HV battery
Note1x spring clip, Plug coolant connections as needed
- Remove coolant drain container from underneath vehicle
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Disconnect rear steering gear harness from subframe
Note1x connector, Release red locking tab
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Disconnect rear subframe harness from rear fascia harness
Note3x connectors
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Release rear diffuser brackets and set aside
Note6x bolts, 13mm, 30 Nm, 4x tabs, Let brackets hang
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Disconnect LHS RDU oil pump connector
Note1x connector
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Disconnect RHS RDU oil pump connector
Note1x connector
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Lower vehicle partially and set lift onto locks
NoteRaise lift off locks, then hold lock release lever to keep locks free while vehicle is lowered, Set vehicle to comfortable working height
- Position powertrain lift under rear subframe
- Connect shop air supply to powertrain table
-
Raise powertrain lift to rear subframe
Note3x dowels, Make sure height on hoist can be reached with powertrain lift height limit
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Safely secure rear subframe onto powertrain lift
NoteSecure subframe to powertrain table and fixture
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Remove bolts securing rear subframe to body
Note4x bolts, 24mm, 355 Nm
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Lower subframe table to access breather tube
NoteUse caution with RDU coolant hoses and breather line, Subframe jig assembly will need to be maneuvered to prevent coolant lines getting caught, Access breather from LH rear wheel well
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Disconnect RDU breather tube
Note2x tabs, 1x clip, Press tabs inward and pull breather up, Release clip from RDU casing
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Fully lower subframe table
NoteUse caution with RDU coolant hoses, Subframe table will need to be moved back to prevent coolant lines getting caught, Ensure DU breather line is not caught
- Disconnect air supply from subframe lifting tool
-
Remove LH RDU inverter to chiller hose
Note2x spring clips, Plug coolant connections as needed
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Remove RH RDU inverter to chiller hose
Note2x spring clips, Plug coolant connections as needed
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Remove clip securing RSA jumper harness to RHS RDU HV harness
Note1x clip
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Disconnect LHS and RHS RDU HV harnesses
Note2x connectors, Release locking tab and rotate release lever up, Do not force release lever up, Ensure alignment tabs on header are not damaged
-
Remove LHS and RHS RDU HV harnesses
Note8x bolts, 10mm, 12 Nm
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Remove RSA and toe link assembly
Note4x bolts, 18 mm, 120 Nm, 1x connector, Release locking tab
-
Remove RDU supply hose
Note1x spring clip, 1x tree clip, 2x clamp clips, Plug coolant connections as needed
-
Remove RDU return hose
Note2x spring clips, 3x tree clips, 2x clamp clips, Plug coolant connections as needed
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Remove bolt securing ground strap to RDU
Note1x bolt, 10mm, 10 Nm
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Remove RDU harness
Note4x connectors, 18x clips
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Release LH rear halfshaft from RDU
Note1x U-bolt, 2x nuts, 10mm, Torque hand-tight, Wrap cable around inner joint then tighten with U-bolt
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Release RH rear halfshaft from RDU
Note1x U-bolt, 2x nuts, 10mm, Torque hand-tight, Wrap cable around inner joint then tighten with U-bolt
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Set up RDU sling
Note2x "E" shackles, 1x "E" shackle
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Secure shackles onto RDU
Note2x "E" shackles, 1x "E" shackle
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Secure sling onto shackles and
gantry
Note2x "E" shackles, 1x "D" shackle, Utilize short chains and hooks to adjust lifting chain length, Adjust lifting chains lengths to ensure RDU with lift evenly and level
-
Remove nuts securing RDU to
subframe
Note4x nuts, 18mm, 85 Nm, 2x nuts, 21mm, 115 Nm
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Raise RDU from subframe
NoteEXTREME CAUTION: 6x studs, Recommend assistance, Do NOT raise all at once, Pry and release bushing mounts from subframe studs, Front mount will release first then rear mounts, Avoid damaging subframe studs, Remove halfshalfs from RDU
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Position empty drive unit crate below
drive unit
NoteMay need to adjust sling, Use pallet if no empty crate available
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Lower drive unit onto empty drive unit
crate
NoteUse pallet if no empty crate available
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Release sling from RDU
Note2x "E" shackles, 1x "D" shackle
-
Inspect the rear subframe stud condition
and repair/replace as necessary.
Note6x studs
-
Position gantry above new drive unit
crate
NoteMay need to adjust gantry
-
Secure sling onto new RDU
Note2x "E" shackles, 1x "D" shackle
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Raise new RDU from crate
Note2x "E" shackles, 1x "D" shackle
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Lower RDU onto subframe
NoteEXTREME CAUTION: 6x studs, Recommend assistance, Do NOT lower all at once, Maneuver and secure bushing mounts onto subframe studs, Rear mounts will secure first then front mount, Avoid damaging subframe studs, Make sure RDU mounts are flush with subframe, Position halfshalfs onto RDU
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Install nuts securing RDU to
subframe
Note4x nuts, 18mm, 85 Nm, 2x nuts, 21mm, 115 Nm
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Release sling from gantry
Note2x "E" shackles, 1x "D" shackle
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Release sling from RDU
Note2x "E" shackles, 1x "D" shackle
- Install LH rear halfshaft into RDU
- Install RH rear halfshaft into RDU
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Install RDU harness
Note6x connectors, 18x clips
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Install bolt securing ground strap to RDU
Note1x bolt, 10mm, 10 Nm
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Install RDU return hose
Note2x spring clips, 3x tree clips, 2x clamp clips, Remove plugs as needed
-
Install RDU supply hose
Note1x spring clip, 1x tree clip, 2x clamp clips, Remove plugs as needed
-
Install RSA and toe link assembly
Note4x bolts, 18 mm, 120 Nm, 1x connector, Secure locking tab
-
Install LHS and RHS RDU HV harnesses
Note8x bolts, 10mm, 12 Nm
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Connect LHS and RHS RDU HV harnesses
Note2x connectors, Verify lever is upright and in open position, Carefully seat connector and allow lever to engage, Fully secure lever and verify red tab is locked, Do not damage any pins
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Install clip securing RSA jumper harness to RHS RDU HV harness
Note1x clip
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Install RH RDU inverter to chiller hose
Note2x spring clips, Remove plugs as needed
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Install LH RDU inverter to chiller hose
Note2x spring clips, Remove plugs as needed
- Position subframe lifting tool with subframe assembly under vehicle
- Connect air supply to subframe lifting tool
-
Raise drive unit until sufficient access is available to breather
NoteRecommend assistance, Use caution to not damage components while raising subframe, Position coolant lines above HV battery lip
-
Connect RDU breather tube
Note2x tabs, 1x clip, Install clip onto RDU casing, Verify tabs are fully engaged
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Fully raise rear drive unit and subframe into position
NoteRecommend assistance, Use caution to not damage components while raising subframe, Position coolant lines above HV battery lip
-
Loosely install bolts securing rear subframe to body
Note4x bolts, 24mm, Hand Tight, Start bolts by hand before using power tools
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Torque rear subframe bolts
Note4x bolts, 24mm, 355 Nm
-
Remove rear subframe tie downs from powertrain lift
NoteRelease subframe to powertrain table and fixture
- Lower powertrain table from subframe and move away from vehicle
-
Connect RHS RDU oil pump connector
Note1x connector
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Connect LHS RDU oil pump connector
Note1x connector
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Secure rear diffuser brackets
Note6x bolts, 13mm, 30 Nm, 4 tabs
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Connect tri motor rear subframe harness onto rear fascia harness
Note3x connectors
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Connect rear steering gear harness
Note1x connector, Engage red locking tab
- Position coolant drain container underneath RH rear of HV battery
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Connect RDU supply hose onto HV battery
Note1x spring clip, Remove plugs as needed
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Connect RDU return hose to PT return hose
Note1x spring clip, 1x clamp clip, Move wheel liner aside as needed, Remove plugs
-
Install front lower clips securing RH rear wheel arch liner
Note3x clips
- Remove coolant drain container from underneath vehicle
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Connect RDU HV harness
Note1x connector, Verify lever is upright and in open position, Carefully seat connector and allow lever to engage, Fully secure lever and verify red tab is locked, Do not damage any pins
-
Connect LHS RDU HV harness
Note1x connector, Verify lever is upright and in open position, Carefully seat connector and allow lever to engage, Fully secure lever and verify red tab is locked, Do not damage any pins
-
Install clips securing AC compressor HV harness
Note3x clips
-
Install rear diffuser
Note6x bolts, 10mm, 6 Nm, 8x bolts, T30, 6 Nm, 6x clips, 6x harness secure clips, 16x tabs
-
Install rear aero shield
Note5x bolts, 10mm, 6 Nm, 2x guides
-
Install Mid-aero shield
Note6x clips, 3x bolts, 15mm, 42 Nm, 5x bolts, 13mm, 28 Nm, 2x bolts, 10mm, 6 Nm, Apply Loctite 222 onto mid aeroshield bolts and install fasteners
-
Lower vehicle partially and set lift onto locks
NoteRaise lift off locks, then hold lock release lever to keep locks free while vehicle is lowered, Set vehicle to comfortable working height
-
Install nuts securing LH rear air spring module to lower control arm assembly
Note2x nylon nut, 21 mm, 140 Nm, Install new nylon nuts
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Install LH rear lower control arm aeroshield
Note3x bolts, 10mm, 7 Nm
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Secure harness to LH rear active dampener
Note2x connectors, 2x grommets
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Install nut securing LH rear upper control arm to knuckle
Note1x nylon nut, 21 mm, 150 Nm, Install new nylon nut, Counter-hold joint to install nut, Support suspension to ease installation, Ensure brake hose is properly routed
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Install LH rear toe link onto LH rear knuckle
Note1x nut, 21mm, 170 Nm, Install new Nyloc nut
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Install LH rear brake caliper onto LH rear knuckle
Note2x bolts, 21mm, 150 Nm
-
Connect EPB harness connector to LH rear brake caliper
Note1x connector, Engage locking tab
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Install LH rear brake line onto upper control arm
Note1x bolt, 10 mm, 10 Nm
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Install nuts securing RH rear air spring module to lower control arm assembly
Note2x nylon nut, 21 mm, 140 Nm, Install new nylon nuts
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Install RH rear lower control arm aeroshield
Note3x bolts, 10mm, 7 Nm
-
Secure harness to RH rear active dampener
Note2x connectors, 2x grommets
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Install nut securing RH rear upper control arm to knuckle
Note1x nylon nut, 21 mm, 150 Nm, Install new nylon nut, Counter-hold joint to install nut, Support suspension to ease installation
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Install RH rear toe link onto RH rear knuckle
Note1x nut, 21mm, 170 Nm, Install new Nyloc nut
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Install RH rear brake caliper onto RH rear knuckle
Note2x bolts, 21mm, 150 Nm
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Connect RH rear EPB harness
Note1x connector, Engage locking tab
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Install RH rear brake line onto upper control arm
Note1x bolt, 10 mm, 10 Nm
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Install the LH and RH rear wheels
Note6x nuts, 21mm, 205 Nm
-
Lower vehicle until tires are touching the ground
NoteRaise lift off locks, then hold lock release lever to keep locks free while vehicle is lowered
- Perform cooling system vacuum refill. See Cooling System (Vacuum Refill).
-
Access rear drive unit replacement panel via Service Mode Plus UI
NoteControls > Service Mode > High Voltage > Procedures > Rear Drive Unit Replacement
-
Run 'Re-Engage Emergency Parking Brake' routine
NoteVia Rear Drive Unit Replacement Dashboard, Ensure result is 'Passed'
-
Run 'Stop Coolant Fill/Drain' routine
NoteVia Rear Drive Unit Replacement dashboard, Ensure result is 'Passed'
-
Run 'CAN Redeploy' routine
NoteVia Rear Drive Unit Replacement dashboard, CAN redeploy will start immediately
-
Run 'Coolant Air Purge' routine
NoteVia Rear Drive Unit Replacement dashboard, Touch time only, wait until coolant pumps stop running (audible noise), Routine Passed will appear, but pumps will run for 10 minutes, If you start next another routine during this time it will fail, Make sure vehicle is not in "Drive", Routine is still running despite the completed message, Speeds can be monitored in garage under PT Thermal tab, Idle speed = ~1500 RPM, Test will vary speeds from 3500-6500 RPM and actuate valves between SERIES and PARALLEL, Putting vehicle into "Drive" will stop this routine, If speeds hover at 7000 RPM, this indicates the pumps are air locked, perform a vacuum fill, Continue to add coolant and purge until the coolant level reaches between the NOM and MAX Lines on the bottle
-
Inspect coolant level and top off as necessary
NoteEnsure that the fluid level is at the Max line, Top off fluid as required
- Install coolant bottle cap
-
Run 'Thermal Performance Test' routine
NoteVia Rear Drive Unit Replacement dashboard, Ensure result is 'Passed'
- Install the rear underhood apron. See Underhood Apron - Rear (Remove and Install).
-
Torque the LH and RH rear wheel
nuts
Note6x nuts, 21mm, 205 Nm
-
Install the LH and RH rear wheel
cap
Note1x cap, 8x clips, Partially secure wheel cap to wheel, While partially installed wheel cover can be rotated to align with tire design, When aligned press inward from center of cap then secure all clips to mounting ring
- Close the powered frunk.
- Exit Service Mode. See Service Mode.
- Remove the vehicle from the lift. See Raise Vehicle - 2 Post Lift.
- Raise the LH front window and close the LH front door.
-
Perform test drive
NotePerform a validation test drive after repairDrive a minimum speed of 25mph, Drive in a straight line and check for excessive pull, Verify the steering wheel is centered when vehicle is driving straight, Determine whether an alignment is recommendedAdd correction code 00040100 as needed