2021-2022 Nissan Sentra Front Rattle or Knock Noise TSB

Symptoms

Owners of 2021-2022 Nissan Sentra vehicles may experience a distinct rattle or knock noise emanating from the front of the vehicle. This noise is typically heard when driving over uneven surfaces, such as bumps, or during turning maneuvers. This specific symptom is addressed by Nissan Technical Service Bulletin NTB22-045A.

The official description for this issue is "RATTLE OR KNOCK NOISE FROM FRONT WHEN DRIVING OVER BUMPS AND/OR TURNING."

Diagnosis

To accurately diagnose the source of the noise, technicians are advised to follow a specific procedure. A helpful video clip is available on ASIST (Nissan's service information system) to aid in confirming the issue. This video can be accessed by opening the bulletin on ASIST and selecting "Video."

The primary diagnostic step involves confirming if the noise originates from the passenger (RH) side Engine Mounting Insulator. With the engine off and the hood open, a technician will grab the powertrain at the Engine Mounting Insulator and shake it side to side. If the rattle or knock noise is present during this test, it confirms the insulator as the source.

If the noise is not present when shaking the powertrain, further diagnostic and repair information should be sought on ASIST. However, if the noise is confirmed, the next step is to replace the faulty component.

Repair Procedure Summary

Once the passenger (RH) side Engine Mounting Insulator is confirmed as the source of the Nissan Sentra front rattle noise, it must be replaced. The repair involves removing the old insulator and installing a new one.

Technicians should refer to the Electronic Service Manual (ESM) under the section: ENGINE > ENGINE MECHANICAL > MR20DD > REMOVAL AND INSTALLATION > ENGINE MOUNTING INSULATOR (RH) for detailed instructions. This ensures the repair is performed correctly and safely.

Required Parts

The following part is required for this repair:

• ENGINE MOUNTING INSULATOR (RH): Part Number 11210-6LB0C

Important Warnings for Owners and Technicians

Nissan emphasizes that this bulletin is intended for qualified technicians only and not for 'do-it-yourselfers.' Proper training, equipment, tools, safety instructions, and know-how are essential for a correct and safe repair. Owners should not attempt this repair themselves.

Technicians are also explicitly warned: "You MUST closely follow the entire SERVICE PROCEDURE as it contains information that is essential to successfully completing this repair." This highlights the importance of adhering to the detailed steps outlined in the bulletin to ensure the issue is resolved effectively.

Owner Action

If your 2021-2022 Nissan Sentra is exhibiting a Nissan Sentra front rattle noise or knock noise when driving over bumps or turning, it is recommended to schedule an appointment with an authorized Nissan dealership. The service technician will perform the necessary diagnosis and, if confirmed, replace the engine mounting insulator according to the guidelines in TSB NTB22-045A.

This Technical Service Bulletin (TSB) was originally published as NTB22-045 on May 25, 2022, and was later amended to NTB22-045A on March 16, 2023, with revised applied dates.

NHTSA ID: 10234071