# 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.

- Type: Service bulletin
- NHTSA id: 10248407
- Published by NHTSA: 2024\-01\-09
- Manufacturer's number: BIG5DEC23\_31
- Manufacturer's date: 2023\-12\-05
- NHTSA component: SERVICE 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

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10248407-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10248407-9999.pdf)

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

## Components

Brakes

## Vehicles listed

- 2023 LAND ROVER DEFENDER

## Recalls for the same vehicles and component

- [23V789000](/recalls/nhtsa/23V789000.md), 2023-11-22: SERVICE BRAKES, HYDRAULIC:CRITICAL FASTENERS

## Other bulletins for the same vehicles and component

- [TUCC\_AUG2025\_37](/bulletins/11022472.md), 2025-09-03, Other: SERVICE BRAKES. 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 \- 04AUG25](/bulletins/11022424.md), 2025-09-03, Other: SERVICE BRAKES. Rear Brake Caliper Piston Dust Boot Distortion Risk
- [SSM76375ATT1 \- 04AUG25](/bulletins/11022423.md), 2025-09-03, Other: SERVICE BRAKES. Rear Brake Caliper Piston Dust Boot Distortion Risk
- [SSM76375 \- 04AUG25](/bulletins/11022421.md), 2025-09-03, Other: SERVICE BRAKES. Rear Brake Caliper Piston Dust Boot Distortion Risk
- [SSM76375 \- 04AUG25](/bulletins/11022420.md), 2025-09-03, Other: SERVICE BRAKES. Rear Brake Caliper Piston Dust Boot Distortion Risk
- [SFCC\_MAR2025\_20](/bulletins/11016648.md), 2025-04-07, Other: SERVICE BRAKES. There have been several FRED submissions for a customer allegation of brake judder/vibration.
- [SFCC\_MAR2025\_18](/bulletins/11016647.md), 2025-04-07, Other: SERVICE BRAKES. There have been several FRED submissions for a customer allegation of a brake noise concern.
- [SFCC\_MAR2025\_17](/bulletins/11016646.md), 2025-04-07, Other: SERVICE BRAKES. There have been several FRED submissions for a customer allegation of a rear brake warning being illuminated on the instrument cluster.
- [SSM76186](/bulletins/11008692.md), 2024-10-07, Other: SERVICE BRAKES. Clicking Ticking Noise from Front Axle While Turning Left or Right and Full Lock at Low Speeds
- [S014SOTA4.1.1v3](/bulletins/10248645.md), 2024-01-09, Service bulletin: EQUIPMENT:ELECTRICAL:RADIO/TAPE DECK/CD ETC.; ELECTRICAL SYSTEM; SERVICE BRAKES, AIR:ANTILOCK; BACK OVER PREVENTION: SENSING SYSTEM: CAMERA; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. 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.

JSON: [/v1/bulletins/10248407](/v1/bulletins/10248407)

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