# Service bulletin No. 89\-23

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10243606
- Published by NHTSA: 2023\-10\-05
- Manufacturer's number: No. 89\-23
- Manufacturer's date: 2023\-09\-08
- NHTSA component: ELECTRONIC STABILITY CONTROL:AUTOMATIC \(ASC\)

## NHTSA's summary

Technical information for WPH4 \- recoding control unit for assistance systems

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10243606-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10243606-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Driver assistance

## Vehicles listed

- 2021 to 2023 PORSCHE 911
- 2022 PORSCHE 911 4S
- 2021 to 2023 PORSCHE 911 CARRERA
- 2021 PORSCHE 911 CARRERA S
- 2023 PORSCHE 911 CARRERA S
- 2023 PORSCHE 911 CARRERA T
- 2021 to 2023 PORSCHE 911 TURBO
- 2022 to 2023 PORSCHE 911 TURBO S
- 2021 to 2023 PORSCHE CAYENNE
- 2021 to 2023 PORSCHE CAYENNE E\-HYBRID
- 2021 to 2022 PORSCHE CAYENNE GT
- 2021 to 2023 PORSCHE CAYENNE GTS
- 2021 to 2023 PORSCHE CAYENNE S
- 2023 PORSCHE CAYENNE TURBO
- 2022 to 2023 PORSCHE CAYENNE TURBO GT
- 2021 to 2023 PORSCHE CAYENNE TURBO S E\-HYBRID
- 2021 to 2023 PORSCHE TAYCAN
- 2022 to 2023 PORSCHE TAYCAN 4 CROSS TURISMO
- 2021 to 2023 PORSCHE TAYCAN 4S
- 2021 to 2023 PORSCHE TAYCAN 4S CROSS TURISMO
- 2021 to 2023 PORSCHE TAYCAN CROSS TURISMO
- 2022 to 2023 PORSCHE TAYCAN GTS
- 2023 PORSCHE TAYCAN GTS SPORT TURISMO
- 2021 to 2023 PORSCHE TAYCAN TURBO
- 2022 PORSCHE TAYCAN TURBO CROSS TURISM
- 2021 to 2023 PORSCHE TAYCAN TURBO S
- 2023 PORSCHE TAYCAN TURBO S CROSS TURI

## Recalls for the same vehicles and component

- [25V896000](/recalls/nhtsa/25V896000.md), 2025-12-19: BACK OVER PREVENTION: SENSING SYSTEM: CAMERA
- [22V404000](/recalls/nhtsa/22V404000.md), 2022-06-08: BACK OVER PREVENTION: SENSING SYSTEM: CAMERA; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\)

## Other bulletins for the same vehicles and component

- [No. 11\-25\-4](/bulletins/11037046.md), 2026-09-04, Service bulletin: FORWARD COLLISION AVOIDANCE: WARNINGS; LANE DEPARTURE: ASSIST; FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL; BACK OVER PREVENTION: REARVIEW SYSTEM BRAKING; FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING. Technical Information for White Messages Regarding Driver Assistance Systems in Conjunction with Passive Fault Memory Entries in the ZFAS Control Unit
- [No. 75\-25](/bulletins/11037045.md), 2026-09-04, Service bulletin: LANE DEPARTURE: ASSIST; BACK OVER PREVENTION: REARVIEW SYSTEM BRAKING; FORWARD COLLISION AVOIDANCE: WARNINGS; FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING; FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL. Technical Information for Various White Messages Regarding Driver Assistance Systems/Fault Memory Entry "C12D5FA" in the ZFAS Control Unit
- [ASB2](/bulletins/11035744.md), 2026-08-05, Service campaign: ELECTRICAL SYSTEM; BACK OVER PREVENTION: WARNINGS. Re\-Programming Assistance System Control Unit \(Stop Delivery/Recall Campaign\)
- [2121.4](/bulletins/11035741.md), 2026-08-05, Service bulletin: VEHICLE SPEED CONTROL; FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL. ACC Dynamic Calibration Fault C110300
- [03/26 9102](/bulletins/11034789.md), 2026-07-07, Service bulletin: BACK OVER PREVENTION: WARNINGS; ELECTRICAL SYSTEM. Complaint Regarding the Camera View \(Real Top View\) in the PCM Central Display \(03/26\)
- [03/26 9102](/bulletins/11034786.md), 2026-07-07, Service bulletin: ELECTRICAL SYSTEM; BACK OVER PREVENTION: WARNINGS. Complaint Regarding the Camera View \(Real Top View\) in the PCM Central Display \(03/26\)
- [03/26 9102](/bulletins/11034597.md), 2026-07-07, Service bulletin: BACK OVER PREVENTION: WARNINGS; ELECTRICAL SYSTEM. Complaint Regarding the Camera View \(Real Top View\) in the PCM Central Display \(03/26\)
- [No. 11\-25](/bulletins/11027134.md), 2026-01-06, Service bulletin: FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL; LANE DEPARTURE: ASSIST; LANE DEPARTURE: WARNING; FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING; FORWARD COLLISION AVOIDANCE: WARNINGS. Technical information for Various Error Messages Regarding Driver Assistance Systems in the Instrument Cluster in Conjunction With Passive Fault Memory Entries in the Driver Assistance Systems Control Unit \- ZFAS
- [No. 75\-25](/bulletins/11026409.md), 2025-12-05, Service bulletin: LANE DEPARTURE: WARNING; LANE DEPARTURE: ASSIST; FORWARD COLLISION AVOIDANCE: WARNINGS; FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING; FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL. Technical information for Various White Messages Regarding Driver Assistance Systems In the Instrument Cluster/Fault Memory Entry "C12D5FA" In the Control Unit for Driver Assistance Systems
- [No. 2503.3](/bulletins/11026391.md), 2025-12-05, Service bulletin: FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL; LANE DEPARTURE: ASSIST. Instructions on advanced technical information for Troubleshooting Advanced Driver Assistance Systems \(ADAS\)

JSON: [/v1/bulletins/10243606](/v1/bulletins/10243606)

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