# Service bulletin NAS21.12.008

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: 10206253
- Published by NHTSA: 2022\-01\-08
- Manufacturer's number: NAS21.12.008
- Manufacturer's date: 2021\-12\-15
- NHTSA component: POWER TRAIN; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; ENGINE

## NHTSA's summary

EMISSION RECALL N620 \- ELECTRIC SUPERCHARGER \- INTERMITTENT OPERATION

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10206253-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10206253-9999.pdf)

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

## Components

Engine, Equipment and accessories, Labels and manuals, Transmission and driveline

## Vehicles listed

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

## Recalls for the same vehicles and component

- [2024739](/recalls/tc/2024739.md), 2024-12-05: Accessories
- [2024599](/recalls/tc/2024599.md), 2024-10-10: Engine
- [2023189](/recalls/tc/2023189.md), 2023-03-30: Engine
- [23V221000](/recalls/nhtsa/23V221000.md), 2023-03-30: ENGINE AND ENGINE COOLING:COOLING SYSTEM
- [23V044000](/recalls/nhtsa/23V044000.md), 2023-02-02: ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION
- [21V584000](/recalls/nhtsa/21V584000.md), 2021-07-29: CHILD SEAT:VEHICLE LATCH ANCHOR; EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL
- [2021353](/recalls/tc/2021353.md), 2021-06-03: Engine
- [21V424000](/recalls/nhtsa/21V424000.md), 2021-06-03: ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\)
- [2020449](/recalls/tc/2020449.md), 2020-09-24: Label
- [20V586000](/recalls/nhtsa/20V586000.md), 2020-09-24: EQUIPMENT:OTHER:LABELS; TIRES

## Other bulletins for the same vehicles and component

- [N861 Range Rover 18SEP26](/bulletins/11038355.md), 2026-10-07, Other: POWER TRAIN. Malfunction Indicator Lamp \(MIL\), loss of start/stop functionality and no communication during diagnostic sessions.
- [N900 Range Rover 21AUG26](/bulletins/11037146.md), 2026-09-08, Other: POWER TRAIN. Malfunction Indicator Lamp \(MIL\) illuminated on the instrument cluster. The root cause of the symptoms is the catalytic converter over temperature.
- [N861 Range Rover 21AUG26](/bulletins/11037143.md), 2026-09-08, Other: ENGINE. Mild Hybrid Electric Vehicle \(MHEV\) Battery Offline
- [N900 Range Rover 16JUN26](/bulletins/11034940.md), 2026-07-08, Other: POWER TRAIN. Customers may experience loss of power, rattling from underside of the vehicle and the Malfunction Indicator Lamp \(MIL\) illuminated on the instrument cluster.
- [N892v3 \- 01MAY26](/bulletins/11033241.md), 2026-06-03, Service bulletin: ENGINE. Arduous customer drive cycles have been found to accelerate the degradation of engine oil, leading to generation of engine oil sludge deposits in high pressure engine oil galleries of the engine and inside the Continuous Variable Valve Lift \(CVVL\) unit.
- [N900 Range Rover 20MAR26](/bulletins/11031117.md), 2026-04-07, Other: POWER TRAIN. Loss of power, rattling from underside of the vehicle and the Malfunction Indicator Lamp \(MIL\) illuminated on the instrument cluster. The root cause of the symptoms is the catalytic converter over temperature. The calibration of the exhaust sound tuning feature allows for too many repeated activations in a short period of time, resulting in catalytic converter over temperature and leading to Diagnostic Trouble Codes \(DTC\) P0420 and P0430 being stored in the Powertrain Control Module \(PCM\).
- [Range Rover\_N900 02\-20\-20](/bulletins/11029864.md), 2026-03-06, Other: POWER TRAIN. Loss of power, rattling from underside of the vehicle and the Malfunction Indicator Lamp \(MIL\) illuminated on the instrument cluster.
- [Defender\_N811 02\-20\-2026](/bulletins/11029848.md), 2026-03-06, Other: ENGINE. Door Zone Module \- Quiescent Drain
- [SSM000017\-19DEC25](/bulletins/11027539.md), 2026-01-09, Other: ENGINE. Coolant fan may continue running at high speed after ignition shut\-off
- [TUCC\_AUG2025\_33](/bulletins/11022471.md), 2025-09-03, Other: POWER TRAIN. Audible clunk noise from rear driveline during low\-speed throttle inputs.

JSON: [/v1/bulletins/10206253](/v1/bulletins/10206253)

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