2021-2022 Nissan Sentra Front Rattle or Knock Noise TSB

Symptoms

Owners of 2021-2022 Nissan Sentra (B18) vehicles may experience a distinct rattle or knock noise emanating from the front of the vehicle. This noise is typically noticeable when driving over bumps and/or during turning maneuvers, indicating a potential issue with a front-end component. The bulletin specifically identifies the symptom as "A rattle or knock noise is heard from the front of the vehicle when driving over bumps and/or turning."

Diagnosis and Trigger Conditions

To accurately diagnose the Nissan Sentra rattle knock noise, technicians are instructed to perform a specific verification step. After turning off the engine and opening the hood, they must locate the passenger (RH) side Engine Mounting Insulator and manually shake the powertrain side-to-side, as visually guided by Figure 1 in the bulletin. If the characteristic rattle or knock noise is reproduced during this manual shake, the insulator is confirmed as the source of the problem.

Nissan also recommends that technicians view a diagnostic video clip available on their ASIST system before starting the procedure. This video provides a visual guide on how to properly perform the diagnostic shake and identify the noise, ensuring accurate diagnosis before proceeding with any repairs.

Repair Procedure Summary

Once the passenger (RH) side Engine Mounting Insulator is confirmed as the source of the Nissan Sentra rattle knock noise, the repair involves its replacement. The bulletin directs technicians to follow the detailed service procedure outlined in the Electronic Service Manual (ESM).

Specifically, the ESM section for ENGINE > ENGINE MECHANICAL > MR20DD > REMOVAL AND INSTALLATION > ENGINE MOUNTING INSULATOR (RH) provides comprehensive steps for safely removing the old insulator and installing the new one. This ensures the repair is performed correctly, effectively resolving the noise issue.

Required Parts

The primary replacement part required for this repair is the Engine Mounting Insulator (RH). The specific Nissan Part Number for this component is 11210-6LB0C. This part is crucial for effectively addressing the rattle or knock noise.

For warranty claims, the bulletin specifies using the Engine Mount Insulator RH (part number series 11210-*****) as the Primary Failed Part (PFP). Depending on whether only an inspection or an inspection and replacement is performed, different operation codes (OP CODEs) are used: AX57AA for inspection only and AW56AA for inspection and replacement, with corresponding flat rate times.

What Owners Should Know

This Technical Service Bulletin (NTB22-045, classification EM22-004) was originally published on May 25, 2022, and applies to 2021-2022 Nissan Sentra (B18) vehicles built from January 2, 2021, to February 23, 2022. It is provided for the use of qualified Nissan technicians who possess the necessary training, equipment, and safety knowledge. It is not intended for "do-it-yourselfers" due to the technical nature of the diagnosis and repair.

Owners should not assume that this described condition automatically applies to their vehicle. If you are experiencing a Nissan Sentra rattle knock noise, it is essential to visit an authorized Nissan dealer. They can accurately diagnose the issue and determine if your specific vehicle is affected by this bulletin and qualifies for the repair.

Source: NHTSA Manufacturer Communication 10218762