# Service bulletin N578NAS2

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: 10202014
- Published by NHTSA: 2021\-10\-06
- Manufacturer's number: N578NAS2
- Manufacturer's date: 2021\-09\-27
- NHTSA component: SUSPENSION; ELECTRICAL SYSTEM

## NHTSA's summary

NON\-START

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10202014-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10202014-9999.pdf)

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

## Components

Electrical system, Suspension

## Vehicles listed

- 2021 LAND ROVER DEFENDER
- 2021 LAND ROVER DISCOVERY SPORT
- 2021 LAND ROVER RANGE ROVER EVOQUE
- 2021 LAND ROVER RANGE ROVER VELAR
- 2021 LAND ROVER RANGE ROVER VELAR PHEV

## Recalls for the same vehicles and component

- [26V599000](/recalls/nhtsa/26V599000.md), 2026-09-17: ELECTRICAL SYSTEM:PROPULSION SYSTEM:DC/DC CONVERTER
- [26V248000](/recalls/nhtsa/26V248000.md), 2026-04-17: ELECTRICAL SYSTEM:PROPULSION SYSTEM:DC/DC CONVERTER
- [21V424000](/recalls/nhtsa/21V424000.md), 2021-06-03: ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\)

## Other bulletins for the same vehicles and component

- [N861 Range Rover 15MAY26](/bulletins/11033423.md), 2026-06-04, Other: ELECTRICAL SYSTEM. 48V Mild Hybrid Electric Vehicle \(MHEV\) battery enters an offline state and no longer communicates or functions as intended.
- [N811 Defender 15MAY26](/bulletins/11033398.md), 2026-06-04, Other: ELECTRICAL SYSTEM. Door Zone Module \- Quiescent Drain
- [N811 Defender 17APR26](/bulletins/11032421.md), 2026-05-07, Other: ELECTRICAL SYSTEM. Door Zone Module \- Quiescent Drain
- [N869 Range Rover 20MAR26](/bulletins/11031114.md), 2026-04-07, Other: ELECTRICAL SYSTEM. Software Over The Air \(SOTA\) updates are failing to complete.
- [N869 DISCOVERY 20MAR26](/bulletins/11031113.md), 2026-04-07, Other: ELECTRICAL SYSTEM. Software Over The Air \(SOTA\) updates are failing to complete.
- [N811 Defender 20MAR26](/bulletins/11031092.md), 2026-04-07, Other: ELECTRICAL SYSTEM. Door Zone Module \- Quiescent Drain
- [SSM76411 \- 10MAR26](/bulletins/11030751.md), 2026-04-06, Other: ELECTRICAL SYSTEM. Smart Key Deactivated message on instrument cluster and unable to start their vehicle
- [Range Rover\_N861 02\-20\-20](/bulletins/11029857.md), 2026-03-06, Other: ELECTRICAL SYSTEM. The 48V Mild Hybrid Electric Vehicle \(MHEV\) battery enters an offline state and no longer communicates or functions as intended. This can result in illumination of the Malfunction Indicator Lamp \(MIL\), loss of start/stop functionality and no communication during diagnostic sessions.
- [TUCC\_FEB2026\_35](/bulletins/11029600.md), 2026-03-04, Other: ELECTRICAL SYSTEM. There is a concern with the 48Volt charging system\(DC/DC\) with the vehicle.
- [TUCC\_FEB2026\_34](/bulletins/11029598.md), 2026-03-04, Other: ELECTRICAL SYSTEM. There is a concern/fault with the 48Volt MHEV system.

JSON: [/v1/bulletins/10202014](/v1/bulletins/10202014)

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