WenmarOpen by Wenmar Pro

Service bulletin BIG5DEC23_31

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 id10248407
Published by NHTSA2024-01-09
Manufacturer's numberBIG5DEC23_31
Manufacturer's date2023-12-05
NHTSA componentSERVICE BRAKES, HYDRAULIC

NHTSA's summary

A concern has been identified on US Land Rover Defender 130 vehicles that have been modified as part of the preparations for JLRNA's TReK event. During the vehicle preparation, reinstallation of brake calipers did not follow the published repair procedure. If the brake calipers are not installed correctly, there is a risk the calipers may detach, resulting in degraded braking performance and possible structural damage to the wheel. Vehicles will require the brake caliper bolts, hoses and associated parts to be replaced following TOPIx workshop manual procedures.

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

Brakes

Vehicles listed
LAND ROVER DEFENDER2023

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

Recalls for the same vehicles and component
23V7890002023-11-22. SERVICE BRAKES, HYDRAULIC:CRITICAL FASTENERS

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
TUCC_AUG2025_372025-09-03. Other. When pushing the rear brake caliper pistons back during a brake service, the caliper piston dust boot may become twisted or distorted if a twist method is used to retract the piston.
SSM76375ATT2 - 04AUG252025-09-03. Other. Rear Brake Caliper Piston Dust Boot Distortion Risk
SSM76375ATT1 - 04AUG252025-09-03. Other. Rear Brake Caliper Piston Dust Boot Distortion Risk
SSM76375 - 04AUG252025-09-03. Other. Rear Brake Caliper Piston Dust Boot Distortion Risk
SSM76375 - 04AUG252025-09-03. Other. Rear Brake Caliper Piston Dust Boot Distortion Risk
SFCC_MAR2025_202025-04-07. Other. There have been several FRED submissions for a customer allegation of brake judder/vibration.
SFCC_MAR2025_182025-04-07. Other. There have been several FRED submissions for a customer allegation of a brake noise concern.
SFCC_MAR2025_172025-04-07. Other. There have been several FRED submissions for a customer allegation of a rear brake warning being illuminated on the instrument cluster.
SSM761862024-10-07. Other. Clicking Ticking Noise from Front Axle While Turning Left or Right and Full Lock at Low Speeds
S014SOTA4.1.1v32024-01-09. Service bulletin. Enhancements to the following systems: Wireless Device Charger, High Voltage (HV) Battery Charge Control, Sound System, ABS (Anti-Lock Braking System), Belt Integrated Starter PHEVs, Rear Camera for cars without 360 view.