# Service bulletin N644NAS1

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: 10206250
- Published by NHTSA: 2022\-01\-08
- Manufacturer's number: N644NAS1
- Manufacturer's date: 2021\-12\-13
- NHTSA component: SERVICE BRAKES, AIR:ANTILOCK:ABS WARNING LIGHT; ELECTRICAL SYSTEM

## NHTSA's summary

MALFUNCTION INDICATOR LAMP \(MIL\) NOT ILLUMINATING

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10206250-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10206250-9999.pdf)

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

## Components

Brakes, Electrical system, Anti\-lock brakes

## Vehicles listed

- 2020 LAND ROVER DEFENDER

## Other bulletins for the same vehicles and component

- [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.
- [NAS21.12.006](/bulletins/10206251.md), 2022-01-08, Service bulletin: SERVICE BRAKES, AIR:ANTILOCK:ABS WARNING LIGHT; ELECTRICAL SYSTEM. MALFUNCTION INDICATOR LAMP \(MIL\) NOT ILLUMINATING

JSON: [/v1/bulletins/10206250](/v1/bulletins/10206250)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%20N644NAS1&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10206250&vehicle=Service%20bulletin%20N644NAS1)