NHTSA ID Number: 11029162
Manufacturer Communication Number: CP1074
TSB/Document Date: 2026-03-02
Summary
Complementary action to upgrade P2023-2025 Polestar
3, central core computer, VCU1 to the upgraded VUC2, and download total software upgrade for the new VCU2.
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TSB/Document ID: CP1074
Replacement Service Bulletin Number:
MFR Communication Date: 2026-02-05
MFR Internal Campaign ID/Software Version: CP1074
Communication Type: Service Campaign
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
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Service and Parts Business
Quality Bulletin
TITLE:
Complementary CP1074: Polestar 3 VCU2 Upgrade
Model Year 2025 Polestar 3
GROUP:
NO:
ISSUING DEPARTMENT:
CAR MARKET:
71
CP1074
Product, Safety and Compliance
United States and Canada
REVISIONS:
ISSUE DATE:
STATUS DATE:
2026-02-03
2026-02-03
Page 1 of 16
BULLETIN REFERENCE
A.
B.
C.
D.
E.
F.
G.
H.
I.
J.
UPGRADE CP1074 DESCRIPTION
VEHICLES INVOLVED
PORT VEHICLES
PARTS INFORMATION/PARTS RETURN
OWNER NOTIFICATION
VEHICLES IN INVENTORY
SERVICE POINT RESPONSIBILITY
TECHNICIAN COMPETENCY REQUIREMENT
REIMBURSEMENT PROCEDURES & ALLOWANCE
CORRECTIVE ACTIONS
A.
UPGRADE CP1074 DESCRIPTION
In order to prepare for future functional growth Polestar 3 cars will be upgraded with an improved
core computer.
Polestar has decided that all cars, concerned by this field service action shall be upgraded in
accordance with this action at the next workshop visit or prior to customer delivery.
WHAT SHOULD YOUR CUSTOMERS DO NOW?
Install any available OTA software updates prior to the workshop visit as this can simplify the
upgrade process.
Average consumption data will show incorrect after the upgrade, it will correct after the next
charging cycle.
Produced and printed in the USA and available as an electronic document.
© Polestar 2026
Quality Bulletin CP1074
B.
VEHICLES INVOLVED
NOTE: SERVICE POINT MUST CONFIRM VEHICLE ELIGIBILITY PRIOR TO BEGINNING THIS
UPGRADE.
Vehicle eligibility must be confirmed with VIDA, see SMB00-033P for instructions.
All vehicles must be checked for any incomplete Recalls, Service Campaigns, or Service
Upgrades. All open Recall, Service Campaigns or Service Action repairs must be completed.
C.
PORT VEHICLES
NOT all eligible vehicles arriving from the ports will have this upgrade completed. Vehicle
eligibility must be confirmed as outlined in Step B. above.
D.
PARTS / PARTS RETURN
Parts should be returned according to normal process for exchange parts. Please refer to parts
bulletin for automatic delivery information of VCU2. The bracket is not restricted and can be
ordered as needed.
Part
E.
Part Description
Qty
Models
36013403
Control Unit, Exch (VCU)
1
Polestar 3
32375652
Bracket LHD (VCU)
1
Polestar 3
32464625
Read Data VCU APPL
1
Polestar 3
32301992
Total Upgrade
1-2 as needed
Polestar 3
32464024
VCU Retrofit
1
Polestar 3
OWNER NOTIFICATION
An owner’s notification will be sent out that will notify the owner of this complementary program
at a later date.
F.
VEHICLES IN INVENTORY
In order to provide the best new car handover experience, vehicles should be upgraded with
CP1074 before new car handover.
G.
SERVICE POINT RESPONSIBILITY
All vehicles qualifying for this complementary program should be upgraded at the next service
opportunity.
H.
TECHNICIAN COMPETENCY REQUIREMENT
The technician’s competency requirement for this upgrade is “Polestar Quality”.
Page 2 of 16
2026-02-03
Quality Bulletin CP1074
I.
REIMBURSEMENT PROCEDURES & ALLOWANCE
Upgrade CP1074 claims should be submitted using the LONG FORM application only.
Claim Type:
Cause Code:
CSC Code:
Main OP:
Failed Part No:
CP1074
02
XW
97593-2
36013403 Control Unit, Exch (VCU)
Operation Number
Repair Description
97593-2
Vehicle computational unit VCU
replace acc. to QB
99943-3
97594-3
Models
Labor Time
1
Polestar 3
1.8
Software downloading acc. to QB
(first total if software older than
1.4.12)
1
Polestar 3
0.2
Calibration with VIDA acc. to QB (For
cars without air suspension)
1
Polestar 3
0.1
Part
Part Description
Qty
Qty
Models
36013403
Control Unit, Exch (VCU)
1
Polestar 3
32375652
Bracket LHD (VCU)
1
Polestar 3
32464625
Read Data VCU APPL
1
Polestar 3
32301992
Total Upgrade
1-2 as needed
Polestar 3
32464024
VCU Retrofit
1
Polestar 3
*Labor times provided are current at the time of release and are subject to change: Claims will be
paid at the time in effect on the repair date.
Second total upgrade and 99943-3 may be claimed only if the vehicle arrives at workshop below 1.4.12.
J.
CORRECTIVE ACTIONS
If the vehicle has any active QBs associated with it, complete those QB actions first to ensure a
fully functional vehicle.
The vehicle needs to have SW baseline 1.4.12 or later prior to the upgrade. There may be a small
update available if the vehicle is on 1.4.12. It is not necessary to perform that upgrade
NOTE! It’s very important that the procedure in the instruction is followed properly. Do not
perform additional total upgrades beyond those listed in the instructions.
2026-02-03
Page 3 of 16
Title
Volvo Car Customer Service
Vehicle Computational Unit (VCU)
Action
Issue
1
Reason
First issue
Affected vehicles
Model year Model
2025
Polestar 3
Description
Plug kit in bag
Page
Operation number:
Replacement
Date
2025-12
QB Instruction VCC-533205-2
Special tools
Part No.
951 2578
1 ( 13 )
QB Instruction VCC-533205-2
Page 2 ( 13 )
Color symbols
Note! This colour chart displays (in colour
print and electronic version) the importance
of the different colours used in the images
of the method steps.
1 . Used for focused component, the
component with which you will do
something.
2 . Used as extra colors when you need to show
or differentiate additional parts.
3 . Used for attachments that are to be
removed/installed. May be screws, clips,
connectors, etc.
4 . Used when the component is not fully
removed from the vehicle but only hung to
the side.
5 . Used for standard tools and special tools.
6 . Used as background color for vehicle
components.
Removal
Note! The same PC must be used through
the entire process.
Check and note: Odometer, Service interval
(time and distance).
Connect the vehicle to VIDA and perform a
readout.
Make sure that the system has downloaded
the latest software. If not so, please download
according to: VIDA/Software/Upgrades/Total
upgrade
Order and download: VCU readout.
QB Instruction VCC-533205-2
Page 3 ( 13 )
Remove the marked part.
Warning! When releasing the cooling
system pressure, cover the coolant
expansion tank cap with a thick cloth.
Remove the marked part.
QB Instruction VCC-533205-2
Page 4 ( 13 )
Follow the instructions regarding battery
disconnecting and connecting , refer to:
Cleaning, Inspection and Adjustment
3 - Electrical system
31 - Battery and mounting
311 - battery
Disconnect the 12 volt battery.
Remove the marked part.
QB Instruction VCC-533205-2
Page 5 ( 13 )
Remove the marked part.
Remove the marked part.
QB Instruction VCC-533205-2
Page 6 ( 13 )
Caution! Do not put the carpet back until
the software is downloaded.
Fold the carpet aside.
Release the locks.
Remove the marked part.
QB Instruction VCC-533205-2
Page 7 ( 13 )
Remove the cable harness clips.
Remove the nuts.
Fold marked parts aside.
Torque:
M6 , 10 Nm
Depress the locking devices.
Remove the marked part.
QB Instruction VCC-533205-2
Page 8 ( 13 )
Disconnect the connectors.
Fold the cable harness aside.
Remove the screw.
Loosen the marked details.
Torque:
M6 , 10 Nm
QB Instruction VCC-533205-2
Page 9 ( 13 )
Disconnect the connectors.
Fold marked parts aside.
Caution! Make sure to seal properly to avoid
any leaks.
QB Instruction VCC-533205-2
Page 10 ( 13 )
Caution! Use suitable paper to absorb any
escaping fluid.
Note! Tilt the unit to minimize leakage.
Undo the hose from the connection.
Allow the tool to remain.
Special Tool: T9512578, Plug kit in bag
Caution! Use suitable paper to absorb any
escaping fluid.
Note! Tilt the unit to minimize leakage.
Undo the hose from the connection.
Allow the tool to remain.
Special Tool: T9512578, Plug kit in bag
QB Instruction VCC-533205-2
Page 11 ( 13 )
Remove the marked part.
Remove the screws.
Remove the marked part.
QB Instruction VCC-533205-2
Page 12 ( 13 )
Installation
Install the marked component.
Install the screws.
Torque:
M6 , 10 Nm
To install, reverse the removal procedure.
Follow the instructions regarding battery
disconnecting and connecting , refer to:
Cleaning, Inspection and Adjustment
3 - Electrical system
31 - Battery and mounting
311 - battery
Connect the 12 V battery and connect the
charger.
Connect the vehicle, enter the VIN manually,
and do a readout.
If "Firewall cannot be unlocked" message is
displayed, press "Continue".
Order and download: Retrofit SP.
Order and download: Total Upgrade.
QB Instruction VCC-533205-2
Page 13 ( 13 )
Perform cooling system, electric powertrain,
filling, and bleeding , refer to:
Cleaning, Inspection and Adjustment
2 - Engine with mountings and equipment
26 - Cooling system
261 - radiator and connections
Perform insulation test according to: Planning
and Diagnostics / Diagnostics / Components /
ECUs / High-Voltage Battery Module (HVBM) /
Diagnostic Sequences / Insulation self-test for
the high-voltage system
Vehicles without air suspension
Calibrate according to: Planning and
Diagnostics / Diagnostics / Components /
ECUs / High-Performance CPU A (HPA) /
Diagnostic Sequences / Calibration of the
position sensors, wheel suspension
Follow the instructions regarding headlamps,
adjusting , refer to:
Cleaning, Inspection and Adjustment
3 - Electrical system
35 - Lighting
352 - lighting, front
All vehicles
Check and compare: Odometer, Service interval
(time and distance).
Check the DTC list for calibration-related fault
codes.
If calibration DTCs are present: Perform
calibration as needed.
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