# Service bulletin SSM74988

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: 10179500
- Published by NHTSA: 2020\-09\-08
- Manufacturer's number: SSM74988
- Manufacturer's date: 2020\-08\-11
- NHTSA component: SERVICE BRAKES, HYDRAULIC

## NHTSA's summary

DTC C055E\-7A \(Brake Hydraulic Circuit “A” Leak – Fluid Leak or Seal Failure\) requires a system “Self\-Check” to be carried out before clearing the DTC and extinguishing the warning lights.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10179500-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10179500-9999.pdf)

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

## Components

Brakes

## Trouble codes named

C055E

## Vehicles listed

- 2020 LAND ROVER DEFENDER

## 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/10179500](/v1/bulletins/10179500)

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