2021 Hyundai Elantra Turn Signal Bulb Replacement TSB 21-BE-007H

Symptoms of Inoperative Turn Signals

Owners of certain 2021 Hyundai Elantra (CN7a) vehicles may notice that their rear turn signal light bulbs have prematurely become inoperative. This means that when the turn signal is activated, the light may not flash, or it may not illuminate at all. This issue can affect either the right or left rear turn signal, or both. An inoperative turn signal is a significant safety concern as it prevents other drivers from being aware of your intended lane changes or turns, increasing the risk of an accident. If you observe that your 2021 Hyundai Elantra turn signal bulbs are not functioning correctly, it is important to address the issue promptly.

Diagnosis and Trigger Conditions

The primary condition indicating this issue is the premature failure of the rear combination lamp turn signal light bulbs. There are no specific diagnostic trouble codes (DTCs) mentioned in the bulletin related to this particular failure. The problem is identified by a visual inspection, where the turn signal bulb simply fails to illuminate when activated. The Technical Service Bulletin (TSB) 21-BE-007H specifically addresses this condition for the 2021 Hyundai Elantra turn signal bulbs, providing a direct solution rather than a complex diagnostic procedure.

Repair Procedure Summary

To resolve the issue of inoperative rear turn signal bulbs, Hyundai's TSB 21-BE-007H outlines a straightforward replacement procedure. The process involves accessing the rear combination lamp assembly from inside the trunk.

1. First, the trunk must be opened to gain access to the rear combination lamp assembly.
2. Next, the rear combination lamp cover needs to be carefully removed.
3. Three 10mm nuts securing the lamp assembly are then removed.
4. With the nuts removed, the entire rear combination lamp assembly can be carefully taken out of its housing.
5. The inoperative turn signal light bulb is then removed from the assembly and replaced with a new one.
6. After replacing the bulb, all parts are reinstalled in the reverse order of removal, ensuring proper fitment.
7. The same procedure is then performed on the other side of the vehicle if both bulbs are affected, or as a preventative measure if recommended by the technician.
8. Finally, the technician will confirm that both the left and right turn signals are operating normally to ensure the repair is successful and the 2021 Hyundai Elantra turn signal bulbs are fully functional.

Required Tools or Parts

The primary part required for this repair is the replacement turn signal light bulb.

• Part Name: Turn Signal Light Bulb
• Part Number: 18642-21007L
• Quantity: 2 (one for each side, as the bulletin covers both left and right rear turn signals).

This part number applies to both the left and right rear turn signal bulbs. Standard automotive tools, such as a 10mm wrench or socket, will also be necessary for the removal and reinstallation of the lamp assembly.

What Owners Should Do

If you own a 2021 Hyundai Elantra and notice that your rear turn signal bulbs are not working, you should contact your authorized Hyundai dealer. Inform them about the issue and mention Technical Service Bulletin 21-BE-007H. The repair involves replacing the turn signal light bulbs for both the right and left sides.

According to the warranty information provided in the TSB, this repair may be covered under warranty. If the affected part is still under warranty, the dealer will submit a claim using the specific operation code 00DA41R0. If the vehicle is out of warranty, it is advisable to discuss potential goodwill consideration with the dealer before proceeding with the repair. The estimated operation time for this procedure is 0.3 hours. Ensuring your 2021 Hyundai Elantra turn signal bulbs are working correctly is crucial for your safety and the safety of others on the road.

NHTSA ID: 10191795