Tesla, Inc.
Service Bulletin

SB-26-40-001
March 26, 2026

Replace Halfshaft Bolts

R1

Classification

Section/Group

Mobile Service

Configuration

Campaign Bulletin

40 - Rear Drive Unit

Cannot Perform

All

Model

Model Year

Country/Region

Build Location

Cybertruck

2024–2025

North America

Giga Texas

The model(s) and model year(s) listed are a general approximation of the affected VIN list. Refer to the VIN/Bulletin Tracker or Customer/Vehicle profile to determine
applicability of this bulletin for a particular vehicle.

Campaign Bulletin: This campaign bulletin addresses a non-safety-related condition and provides recommended technical
diagnosis and repair procedures. Apply this procedure to the applicable vehicles.

This Service Document supersedes SB-26-40-001, dated January 21, 2026. This new revision, R1, adds specific
instructions to replace the hub and halfshaft if axle grinding noise is present, and a caution to not reuse halfshaft bolts
or modify bolt torque once initial torque is set. Each content change is marked by a vertical line in the left margin.
Discard the previous version and replace it with this one.

Condition
On certain Cybertruck vehicles, the halfshaft bolts may lose torque, which may cause a loud grinding noise if the hub
and axle facespline teeth become unseated and damaged.

Correction
If axle grinding noise is present before starting this bulletin, replace the hub, halfshaft, and halfshaft bolt on the
impacted corner. Replace the remaining halfshaft bolts on the unaffected halfshaft locations. Then, run a Double
Pedal Torque Test to confirm the hub and halfshaft facespline teeth are properly seated.
If no axle grinding noise is present before starting this bulletin, replace all 4 halfshaft bolts and run a Double
Pedal Torque Test to confirm the hub and halfshaft facespline teeth are properly seated.
NOTE: If this bulletin is applicable to the vehicle, perform the correction without any need for inspection.

Correction Description

Correction

Time

Replace Halfshaft Bolts: No Hub or Halfshaft Replacement Required

S012640001

0.48

Replace Halfshaft Bolts; Replace 1 Front Hub and Halfshaft Only

S022640001

1.38

Replace Halfshaft Bolts; Replace 2 Front Hubs and Halfshafts Only

S032640001

2.10

Replace Halfshaft Bolts; Replace 1 Rear Hub and Halfshaft Only

S042640001

1.26

Replace Halfshaft Bolts; Replace 2 Rear Hubs and Halfshafts Only

S052640001

1.92

Replace Halfshaft Bolts; Replace 1 Front Hub and Halfshaft; Replace 1 Rear Hub
Halfshaft
Replace Halfshaft Bolts; Replace 1 Front Hub and Halfshaft; Replace 2 Rear Hubs and
Halfshafts
Replace Halfshaft Bolts; Replace 2 Front Hub and Halfshaft; Replace 1 Rear Hub and
Halfshaft
Replace Halfshaft Bolts; Replace 2 Front Hub and Halfshaft; Replace 2 Rear Hubs and
Halfshafts

S062640001

1.92

S072640001

2.58

S082640001

2.64

S092640001

3.30

Part Number
Parts Required 2009788-00-A
If Necessary 1250171-00-D
1250161-00-C
1250119-00-B
1250169-00-B

Description

Quantity

BLT,HHL,M16-1.5x80,[109],G0410,SM,A02

4

DRIVEN HUB - 6X139.7MM PCD - 180MM FLANGE
HALFSHAFT - 33.4MM X 588MM SHAFT - REAR
HALFSHAFT - 34MM X 592MM SHAFT - TRIMOTOR
HALFSHAFT - 42MMX 498MM SHAFT - REAR - TRI MOTOR

1–4
1–2
1–2
1–2

These part numbers were current at the time of publication. Use the revisions listed or later, unless
otherwise specified in the Parts Catalog.

SB-26-40-001 R1

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_

Procedure
1. If axle grinding noise is present, perform the following:
a. Replace the hub, halfshaft, and halfshaft bolt on the impacted axle (refer to the appropriate Service
Manual procedure(s):
▪

▪

Hub procedures:
•

LH and/or RH Front Hub (Remove and Replace)

•

LH and/or RH Rear Hub (Remove and Replace)

Halfshaft procedures:
•

LH or RH Front Halfshaft (Remove and Replace)

•

LH and RH Front Halfshafts (Remove and Replace)

•

LH or RH Rear Halfshaft (Remove and Replace)

•

LH and RH Rear Halfshafts (Remove and Replace)

b. Once the impacted hub(s), halfshaft(s) and halfshaft bolt(s) have been replaced, continue to step 2.
NOTE: If the hub, halfshaft, and halfshaft bolt were replaced in this step, it is not necessary to replace
the halfshaft bolt again in the following steps (steps 3–9).
If axle grinding noise is not present, continue to the next step.
2. On the vehicle touchscreen, touch Controls (vehicle icon) > Software, and then scroll down to display the
vehicle software version.
•

If the vehicle software version is FSD (Supervised) 14.2.1.25 or later, or 2025.44.3 or later, continue to the
next step.

•

If the vehicle software version is FSD (Supervised) 14.2.1.25 or earlier, or 2025.44.3 or earlier, update to
version FSD (Supervised) 14.2.1.25 or later, or 2025.44.3 or later, and then continue to the next step
(refer to Service Manual procedure 00020003).

3. Remove the LH front wheel cover (refer to Service Manual procedure 34015022).
NOTE: If the LH front halfshaft bolt was replaced in step 1, skip to step 10.
4. Use a breaker bar to loosen the LH front halfshaft bolt (24 mm, 300 Nm) (Figure 1).

Figure 1

SB-26-40-001 R1

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_

5. Remove the LH front halfshaft bolt through the center of the wheel (Figure 2), and then discard the bolt.

Figure 2
6. Use an assistant to push the LH front halfshaft toward the LH front hub while simultaneously rotating the halfshaft
until the facesplines are locked (Figure 3).
NOTE: The halfshaft will no longer rotate once the facesplines are aligned.

Figure 3

SB-26-40-001 R1

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_

7. With the assistant holding the halfshaft with the facesplines locked, install and hand-tighten a new LH front
halfshaft bolt through the center of the wheel (Figure 4).
CAUTION: When tightening the axle bolt, do not apply force on the bolt head in the inboard vehicle direction
to prevent unseating the face splines.
CAUTION: The adhesive thread patch on the new halfshaft bolt has a curing time of approximately 2 minutes.
Do not allow more than 2 minutes to pass before continuing to the next step.
CAUTION: Do not reuse the existing bolt. Only install a new bolt.

Figure 4
8. Tighten the LH front halfshaft bolt (24 mm, 300 Nm) (Figure 5).
CAUTION: Make sure the splines on the hub and halfshaft are properly aligned before tightening the
halfshaft bolt.
CAUTION: Do not tighten or loosen the bolt after the initial torque (300 Nm) is properly set. Modifying the
torque on the bolt after it has been set may break the adhesive bond, causing the bolt to loosen. Halfshaft bolts
are single-use and must be replaced if the adhesive bond is broken.

Figure 5
9. Install the LH front wheel cover (refer to Service Manual procedure 34015022).
SB-26-40-001 R1

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_

10. Repeat steps 3–9 for the remaining halfshaft bolts.
11. Drive the vehicle to an empty area of the parking lot with at least 25 feet of empty space in front of and behind the
vehicle.
WARNING: The following routine builds high motor torque at a standstill. DO NOT perform the following
steps indoors or without adequate space in front of or behind the vehicle in case of sudden vehicle movement
during the routine.
12. Connect a laptop with Toolbox 3 to the vehicle (refer to Service Manual procedure Toolbox 3 (Connect and
Disconnect)).
WARNING: Make sure the laptop is in a safe location in the vehicle in case of sudden vehicle movement
during the routine.
13. In Toolbox, click the Actions/Autodiag tab, type “double” into the search field, click Double Pedal Torque
Check, and then read through the instructions before starting the routine.
WARNING: Make sure to carefully read and understand the instructions before performing this routine.
14. When ready to perform the test, click Run, and perform the test as instructed in the routine.
WARNING: This routine builds high motor torque at a standstill. DO NOT perform this test indoors or without
adequate space in front of or behind the vehicle in case of sudden vehicle movement during the routine.
NOTE: Do not change the routine torque cycle and timeout fields.
NOTE: During the routine, the vehicle will “squat” under torque load. Torque will be removed once the
accelerator pedal is released. The vehicle should not move forward or rearward during this routine.
15. If the test is successful, and no axle grinding noise is heard, skip to the next step.
16. If the routine fails, but no axle grinding noise is heard, rerun the routine.
17. If the test fails and axle grinding noise is heard, perform the following:
a. Replace the hub, halfshaft, and halfshaft bolt on the impacted axle (refer to 1 or more of the following
Service Manual procedures):
▪

▪

Hub procedures:
•

LH and/or RH Front Hub (Remove and Replace)

•

LH and/or RH Rear Hub (Remove and Replace)

Halfshaft procedures:
•

LH or RH Front Halfshaft (Remove and Replace)

•

LH and RH Front Halfshafts (Remove and Replace)

•

LH or RH Rear Halfshaft (Remove and Replace)

•

LH and RH Rear Halfshafts (Remove and Replace)

b. Once the impacted hub(s), halfshaft(s) and halfshaft bolt(s) have been replaced, repeat steps 10–13 to
rerun the Double Pedal Torque Check routine.
18. Disconnect Toolbox and remove the laptop from the vehicle (refer to Service Manual procedure Toolbox 3
(Connect and Disconnect)).
19. Use the Correction Description table in this document to apply the appropriate Correction Code for the
combination of hub and halfshaft replacement(s), if any.
SB-26-40-001 R1

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