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Service bulletin Q640NAS1

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10116925
Published by NHTSA2017-09-08
Manufacturer's numberQ640NAS1
Manufacturer's date2016-12-05
NHTSA componentSUSPENSION; ELECTRICAL SYSTEM

NHTSA's summary

Situation: An issue has been identified on a limited number of vehicles within the listed Affected Vehicle Range may have been manufactured away from process and, in some cases, the air suspension system amber warning light may appear on the instrument cluster with one or more of the Diagnostic Trouble Codes (DTC) stored in the Chassis Control Module (CHCM): C1A31­12, C1A32­12, C1A33­12, C1A34­12, C1A35­12, C1A36­12, C1A37­12, and/or C1A38­12.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Electrical system, Suspension

Trouble codes named

C1A31, C1A32, C1A33, C1A34, C1A35, C1A36, C1A37, C1A38

Vehicles listed
LAND ROVER RANGE ROVER2016
LAND ROVER RANGE ROVER SPORT2016

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20253382025-06-19. Suspension
20252742025-05-22. Suspension
20226682022-11-23. Suspension

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
SSM76411 - 10MAR262026-04-06. Other. Smart Key Deactivated message on instrument cluster and unable to start their vehicle
TUCC_APR2025_182025-05-05. Other. Leaking windshield that caused the water ingress on the electrical component.
SSM758692023-09-08. Service bulletin. Coolant Low Warning Message Displayed On The Instrument Panel Cluster
SSM718642023-07-17. Service bulletin. When returning failed parts through warranty it has been found that the rubber surround is still attached to the camera lens. This applies to both high line and low line rear camera.
SSM718492023-07-17. Service bulletin. A customer may complain that either "Vehicle Raising In Progress" or "Suspension Will Rise When System Is Cooled" messages can be seen. Fault codes U210A - 16 and C1A24 - 67 may also be stored.
SSM442112023-07-17. Service bulletin. A review of Front Lower Control Arm warranty returns from various markets has shown that arm assemblies have been incorrectly changed for knock issues when the front bush is cracked and should have been replaced as per Technical Service Bulletins LTB00204v4 and LTB00123v4.
SSM758242022-11-08. Service bulletin. Chassis Control Module (CHCM) Suspension Warning on Cluster
LTB00557NAS32022-10-24. Service bulletin. Technical Bulletin: Knock Sound From Front Suspension (Onwards)
LTB00557NAS22022-10-24. Service bulletin. Technical Bulletin: Knock Sound From Front Suspension (Onwards)
SSM75825ATT2022-10-07. Service bulletin. MHEV DC DC CONVERTER SQUEAKING NOISE FROM INSIDE THE CABIN