# Service bulletin 2055643/2

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: 10178185
- Published by NHTSA: 2020\-08\-07
- Manufacturer's number: 2055643/2
- Manufacturer's date: 2020\-07\-03
- NHTSA component: ELECTRICAL SYSTEM:SOFTWARE; SUSPENSION:REAR

## NHTSA's summary

Software incompatibilty between J775 \(Address 74\) \- J924 \(Address D4\) and J1096 \(Address D5\). Customer statement / workshop findings After replacing the software or hardware for the Adaptive suspension control unit \(J775 Diagnostic address 74\) or the Front Roll stabilisation control unit \(J924 Diagnostic address D4\) and/or the Rear Roll stabilisation unit \(J1096 Diagnostic address D5\) the software could be incompatible between the control units Technical background The Adaptive air suspension control unit \(J775\) functions as a universal control unit for the chassis control systems. The Adaptive air suspension control unit \(J775\) controls several functions in the car in particular the master for the active roll control system, The control unit contains developed suspension and damping control software. Should one of the modules be replaced for example \(J775\) on an early model vehicle the newer software contained within the replacement control unit may not be compatible with \(J924\) and/or \(J1096\)

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10178185-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10178185-9999.pdf)

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

## Components

Electrical system, Suspension, Software

## Vehicles listed

- 2017 to 2021 BENTLEY BENTAYGA

## Other bulletins for the same vehicles and component

- [2055643\-1](/bulletins/10165315.md), 2019-09-23, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE. Software incompatibilty between J775 \(Address 74\) \- J924 \(Address D4\) and J1096 \(Address D5\)
- [2053719\-2](/bulletins/10165306.md), 2019-09-23, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE. Bentayga \- Infotainment unit software update \(SC19/12\)
- [2050225.1](/bulletins/10130017.md), 2018-03-12, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN; ENGINE. Engine and Transmission software validation \(ASW 09.22\) \(SC18/01\)
- [20454432](/bulletins/10110886.md), 2017-08-10, Service bulletin: ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ELECTRICAL SYSTEM:SOFTWARE; ELECTRICAL SYSTEM. Bentayga \- Battery Energy Control Module 2 software update \(ASW 09.03\) \(SC16/27\)
- [20436407](/bulletins/10091071.md), 2017-02-09, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE. SOFTWARE UPDATE ABS \(SC16/04\)
- [2027022/7](/bulletins/10088476.md), 2017-01-12, Service bulletin: ELECTRICAL SYSTEM:12V/24V/48V BATTERY; ELECTRICAL SYSTEM:SOFTWARE. NEW CONTINENTAL GT \- GTC AND FLYING SPUR \- STEERING WHEEL NOISE

JSON: [/v1/bulletins/10178185](/v1/bulletins/10178185)

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