2018-2023 Nissan Front Axle Thread Damage During Nut Removal

Nissan has issued Technical Service Bulletin (TSB) NTB21-013B to address a critical issue concerning Nissan Sentra front axle damage that can occur during the removal of the front axle nut. This bulletin provides updated guidance for technicians working on various 2018-2023 Nissan models, ensuring proper procedures are followed to prevent costly damage.

The Problem: Preventing Front Axle Thread Damage

When a front axle nut needs to be removed from an affected Nissan vehicle, a common issue arises from the staking of the nut into the axle keyway. This staking is a security measure, but if not properly disengaged, it can lead to significant thread damage on the axle during removal. The core problem this TSB addresses is the potential for Nissan Sentra front axle damage if the axle nut's staking, which secures it to the axle keyway, is not properly disengaged before removal.

Symptoms of Improper Removal

If the axle nut staking is not removed correctly, the threads on the front axle can become severely damaged. This damage is visible and can compromise the integrity of the axle, potentially leading to further issues or making future repairs more difficult. Figure 2 in the original bulletin illustrates an example of threads damaged by improper axle nut removal.

The Solution: The Cape Chisel Tool

To prevent front axle thread damage, Nissan mandates the use of a specialized tool known as the "Cape Chisel." This tool is specifically designed to remove the staking from the axle nut without causing harm to the axle threads. The original part number for this essential tool is J-52982, with a new tool part number identified as NI-52982.

Nissan dealers received the Cape Chisel in December 2020 to ensure technicians had the necessary equipment to perform this procedure correctly. Its precise design allows for the careful removal of the stake, preserving the axle's threads.

Repair Procedure Summary

The TSB directs technicians to refer to the Electronic Service Manual (ESM) for detailed instructions on using the Cape Chisel. The general procedure involves:

1. Identifying the need for front axle nut removal for any service reason.
2. Using the Cape Chisel (J-52982 / NI-52982) to carefully remove the staking from the axle nut, ensuring no damage to the axle threads.
3. Proceeding with the front axle nut removal as per standard ESM procedures.

Technicians should consult the ESM section: TRANSMISSION & DRIVELINE > FRONT AXLE > REMOVAL AND INSTALLATION > FRONT DRIVE SHAFT > LH/RH for comprehensive guidance.

Required Tools or Parts

For this specific procedure, the primary required tool is the Cape Chisel. It is identified by two part numbers:

• J-52982 (original part number)
• NI-52982 (new tool part number)

Additional tools may be purchased from Tech-Mate via their website (www.techmatetools.com) or by calling 1-833-397-3493.

Important Warnings for Owners

Nissan explicitly states a critical warning for both technicians and owners:

• "Damaged threads, due to improper removal of the stake placed in the nut, will not be covered by warranty."

This means that if the axle threads are damaged because the correct procedure and tool were not used, the repair costs will not be covered under warranty. Nissan also emphasizes that these bulletins are intended for use by qualified technicians, not 'do-it-yourselfers,' due to the specialized knowledge and tools required.

Bulletin History and Revisions

This TSB has undergone several revisions:

• February 26, 2021 (NTB21-013): Original bulletin published.
• September 27, 2022 (NTB21-013A): The list of APPLIED VEHICLES was revised, and Tech-Mate contact information and a new part number for the Cape Chisel were added.
• March 29, 2023 (NTB21-013B): The list of APPLIED VEHICLES was revised again.

What Owners Should Do

If your 2018-2023 Nissan Altima, LEAF, Pathfinder, Rogue, or Sentra requires any service that involves the removal of the front axle nut, it is important to ensure that your Nissan service center is aware of and follows TSB NTB21-013B. This will guarantee that the correct procedure, utilizing the Cape Chisel tool, is applied to prevent any Nissan Sentra front axle damage and avoid potential warranty issues related to improper repair.

Source: NHTSA ID 10234046