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Service bulletin SSM74894ATT1

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10178120
Published by NHTSA2020-08-07
Manufacturer's numberSSM74894ATT1
Manufacturer's date2020-07-10
NHTSA componentPOWER TRAIN

NHTSA's summary

Customers or retailers may report on Defender INGENIUM I6 3.0L Petrol engine versions an abnormal noise when accelerating or decelerating, the noise can be described as 'humming, buzzing or grinding.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Transmission and driveline

Vehicles listed
LAND ROVER DEFENDER2020

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
21V4240002021-06-03. ELECTRICAL SYSTEM:SOFTWARE; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM)

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
TUCC_JUN2025_462025-07-06. Other. MIL on Instrument cluster.
TUCC_JUN2025_282025-07-06. Other. TURBOCHARGER COOLANT FEED AND RETURN PIPE O- RING LEAK
TUCC_MAY2025_342025-05-14. Other. Vehicle cranks, but does not run when at operating temperature
TUCC_APR2025_442025-05-05. Other. Electrical system warning light will be on the instrument cluster.
SFCC_DEC2024_492025-01-07. Other. Malfunction indicator lamp is displayed.
SFCC_NOV2024_362024-12-03. Other. MIL lamp on the instrument cluster. FUEL PUMP DRIVER MODULE INOPERATIVE
SFCC_OCT2024_532024-11-07. Other. MIL lamp on the instrument cluster
SFCC_SEP2024_432024-10-07. Other. 'Stop Safely Electrical Fault Detected' warning message on the instrument panel.
SFCC_AUG2024_462024-09-06. Other. Electrical system fault on instrument cluster or noise from engine.
SFCC_JUL2024_412024-08-07. Other. Low coolant light on or smell of coolant from engine area.