# 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.

- Type: Service bulletin
- NHTSA id: 10178120
- Published by NHTSA: 2020\-08\-07
- Manufacturer's number: SSM74894ATT1
- Manufacturer's date: 2020\-07\-10
- NHTSA component: POWER 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

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10178120-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10178120-9999.pdf)

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

## Components

Transmission and driveline

## Vehicles listed

- 2020 LAND ROVER DEFENDER

## Recalls for the same vehicles and component

- [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

- [TUCC\_JUN2025\_46](/bulletins/11020209.md), 2025-07-06, Other: POWER TRAIN. MIL on Instrument cluster.
- [TUCC\_JUN2025\_28](/bulletins/11020204.md), 2025-07-06, Other: POWER TRAIN. TURBOCHARGER COOLANT FEED AND RETURN PIPE O\- RING LEAK
- [TUCC\_MAY2025\_34](/bulletins/11018311.md), 2025-05-14, Other: POWER TRAIN. Vehicle cranks, but does not run when at operating temperature
- [TUCC\_APR2025\_44](/bulletins/11017749.md), 2025-05-05, Other: POWER TRAIN. Electrical system warning light will be on the instrument cluster.
- [SFCC\_DEC2024\_49](/bulletins/11012402.md), 2025-01-07, Other: POWER TRAIN. Malfunction indicator lamp is displayed.
- [SFCC\_NOV2024\_36](/bulletins/11011026.md), 2024-12-03, Other: POWER TRAIN. MIL lamp on the instrument cluster. FUEL PUMP DRIVER MODULE INOPERATIVE
- [SFCC\_OCT2024\_53](/bulletins/11010198.md), 2024-11-07, Other: POWER TRAIN. MIL lamp on the instrument cluster
- [SFCC\_SEP2024\_43](/bulletins/11008614.md), 2024-10-07, Other: POWER TRAIN. 'Stop Safely Electrical Fault Detected' warning message on the instrument panel.
- [SFCC\_AUG2024\_46](/bulletins/11007185.md), 2024-09-06, Other: POWER TRAIN. Electrical system fault on instrument cluster or noise from engine.
- [SFCC\_JUL2024\_41](/bulletins/11006072.md), 2024-08-07, Other: POWER TRAIN. Low coolant light on or smell of coolant from engine area.

JSON: [/v1/bulletins/10178120](/v1/bulletins/10178120)

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