2021-2023 Nissan Altima / Sentra Shift Knob Service

This technical service bulletin (TSB) NTB23-030 outlines the official procedure for removing and installing the CVT Shift Selector Lever Knob on affected 2021-2023 Nissan Altima (L34) and 2021-2023 Nissan Sentra (B18) models equipped with a Continuously Variable Transmission (CVT). This bulletin ensures that Nissan technicians follow a standardized and correct method when the shift knob needs to be serviced for any reason.

Repair Procedure Summary

The TSB details a step-by-step process for both removal and installation of the CVT Shift Selector Lever Knob.

CVT Shift Selector Lever Knob Removal:

1. Prepare for Removal: Begin by sliding the Shift Selector Lever Finisher Boot down, as shown in Figure 2 of the bulletin.
2. Remove Lock Pin: Using a suitable tool, carefully pull the Lock Pin forward and then remove it. Technicians are advised to avoid damaging or losing the Lock Pin, as it will be reused during installation (Figure 3).
3. Remove Knob: Once the Lock Pin is out, pull the CVT Shift Selector Lever Knob straight upward to detach it from the selector lever (Figure 4).

CVT Shift Selector Lever Knob Installation:

1. Locate Lock Pin Slot: Identify the Lock Pin slot in the upper shaft area of the CVT Shift Selector Lever Knob (Figure 5).
2. Insert Lock Pin: Insert the Lock Pin into its designated slot from the front of the knob, pushing it backward until it clicks into place (Figure 6). If the Lock Pin is lost or damaged, it must be replaced with the specified part.
3. Install Knob: Position the CVT Shift Selector Lever Knob onto the Selector Lever and push it downward firmly until it clicks, indicating it is securely seated (Figure 7).
4. Verify Security: Pull the CVT Shift Selector Lever Knob upward to confirm it does not come off. If it detaches, the installation steps (4-7) should be repeated.
5. Reinstall Finisher Boot: Finally, slide the Shift Selector Lever Finisher Boot upward until it clicks into its original position.

Required Tools or Parts

For this service procedure, specific Nissan genuine parts may be required, especially if components are damaged or lost during the process. The following parts are listed:

• KNOB ASSY – CONTROL LEVER, AUTO: Part Number 34910-6CB2A (Quantity: 1)
• SPRING – RETURN, BUTTON (Lock Pin): Part Number 34922-6CA0A (Quantity: 1, as needed)

Important Warnings

The bulletin includes critical instructions for technicians to ensure proper installation and prevent damage:

• Lock Pin Placement: "Do not place the Lock Pin in any area other than the Lock Pin slot."
• Lock Pin Insertion: "Do not insert the Lock Pin from the back of the CVT Shift Selector Lever Knob."
• Pre-installation Check: "Confirm that the Lock Pin is placed correctly before installing the CVT Shift Selector Lever Knob onto the Selector Lever."
• Damaged Lock Pin: "If the Lock Pin is lost or damaged, replace it with the one listed in PARTS INFORMATION."

Owner Action

This TSB is primarily for the guidance of Nissan dealership technicians. If your 2021-2023 Nissan Altima or 2021-2023 Nissan Sentra requires service involving the CVT shift selector lever knob, your Nissan dealer will refer to this bulletin to ensure the procedure is performed correctly. There is no specific owner action required beyond taking your vehicle to an authorized service center if this service is needed.