2021-2024 Nissan Sentra Front Rattle or Knock Noise TSB

Owners of 2021-2024 Nissan Sentra (B18) vehicles, specifically those built between January 2, 2021, and April 11, 2024, may experience an audible rattle or knock noise emanating from the front of the vehicle. This Nissan Sentra front rattle noise is typically noticeable when driving over uneven surfaces like bumps or during turns.

Nissan Technical Service Bulletin (TSB) NTB22-045B, an amendment to previous bulletins NTB22-045 and NTB22-045A, addresses this specific concern. The bulletin indicates that the passenger (RH) side Engine Mounting Insulator is the source of this noise.

Symptoms

The primary symptom is a distinct rattle or knock noise heard from the front of your Nissan Sentra. This noise is most apparent under specific driving conditions:

• When driving over bumps or uneven road surfaces.
• When making turns.

Diagnosis and Trigger Conditions

To confirm that the Nissan Sentra front rattle noise originates from the Engine Mounting Insulator, technicians follow a specific diagnostic procedure. This involves turning off the engine, opening the hood, and manually shaking the passenger (RH) side Engine Mounting Insulator and the attached powertrain side-to-side.

Nissan advises that the required shaking force can be quite vigorous to accurately simulate actual driving conditions, where centrifugal force pulls the engine during cornering. It's also noted that the rattle or knock noise might not be easily audible from outside the vehicle, as it can be structurally transferred and heard more clearly inside the cabin.

For additional diagnostic assistance, Nissan recommends viewing a video clip available on their ASIST system.

Repair Procedure Summary

Once the passenger (RH) side Engine Mounting Insulator is confirmed as the source of the Nissan Sentra front rattle noise, the repair involves replacing this component. The detailed steps for removal and installation are outlined in the Electronic Service Manual (ESM) under the following path: ENGINE > ENGINE MECHANICAL > MR20DD > REMOVAL AND INSTALLATION > ENGINE MOUNTING INSULATOR (RH).

Required Tools or Parts

The primary part required for this repair is a new Engine Mounting Insulator (RH). The specific part number is:

• Engine Mounting Insulator (RH): 11210-6LBOD

Technicians will also utilize the ASIST system for diagnostic video references and the Nissan Warranty Flat Rate Manual for appropriate labor times.

Important Warnings for Owners

Nissan emphasizes that these bulletins are intended for use by qualified technicians and not for 'do-it-yourselfers'. It is crucial not to assume that this condition applies to your specific vehicle without professional verification. Always consult your Nissan dealer to determine if this bulletin is applicable to your vehicle and to ensure the repair is performed correctly and safely.

Owner Action

If your 2021-2024 Nissan Sentra exhibits a Nissan Sentra front rattle noise when driving over bumps or turning, it is recommended to schedule an appointment with an authorized Nissan dealership. Their trained technicians can accurately diagnose the issue using the procedures outlined in TSB NTB22-045B and perform the necessary repair. While this is a Technical Service Bulletin and not a recall, such repairs are often covered under the vehicle's warranty.

Source: NHTSA Manufacturer Communication 11006976