24-2021

TECHNICAL SERVICE BULLETIN
Whistle Noise At Lower Left Windshield Area

23 January
2024

This bulletin supersedes 23-2213. Reason for update: revise Figure 1, add 2024 vehicles and the part list
Model:
Ford
2021-2024 Bronco
Issue: Some 2021-2024 Bronco vehicles may exhibit a whistle noise below the lower left windshield area at the
bottom of the A-pillar. This may be due to a missed body sealer application at the factory. To correct this condition,
follow the Service Procedure to reseal the affected body seam.
Action: Follow the Service Procedure to correct the condition on vehicles that meet all of the following criteria:
• 2021-2024 Bronco
• Whistle noise from the lower left windshield area
Parts
Service Part Number Quantity

Description

Ontain Locally

As Needed Butyl Tape, 3M™ 08612 Windo Weld Round Ribbon Sealer Or Equivalent

Ontain Locally

As Needed 3M™ 2 Inch Wide Masking Tape Or Equivalent

Warranty Status: Eligible under provisions of New Vehicle Limited Warranty (NVLW)/Service Part Warranty
(SPW)/Special Service Part (SSP)/Extended Service Plan (ESP) coverage. Limits/policies/prior approvals are not
altered by a TSB. NVLW/SPW/SSP/ESP coverage limits are determined by the identified causal part and verified
using the OASIS part coverage tool.
Labor Times
Operation
No.

Description
2021-2024 Bronco: Install Tape, Road Test (Pass) Inspect Gap And Apply Butyl Sealer If
Necessary (Do Not Use With Any Other Labor Operations)

Time

242021A

Repair/Claim Coding
Causal Part:

5802012

Condition Code: 68

Service Procedure
1. Tape off the left side of the cowl panel and drive the vehicle above 50 mph (80 km/h). Did taping off the cowl
resolve the whistle noise? (Figure 1)
Figure 1

1.2
Hrs.

(1). Yes - proceed to Step 2.
(2). No - this article does not apply. Refer to Workshop Manual (WSM), Section 100-04.
2. Remove the left A-pillar trim. Refer to WSM, Section 501-05.
3. Visually inspect for a gap in the sheet metal at the bottom of the A-pillar where it joins the rear engine compartment
wall. Is a gap present? (Figure 2)
Figure 2

(1). Yes - proceed to Step 4.
(2). No - this article does not apply.
4. Apply butyl to fill the gap between the two metal panels and eliminate the air entry.
5. To assemble, reverse the removal procedure.

© 2024 Ford Motor Company
All rights reserved.
NOTE: The information in Technical Service Bulletins is intended for use by trained, professional technicians with the knowledge, tools, and
equipment to do the job properly and safely. It informs these technicians of conditions that may occur on some vehicles, or provides information
that could assist in proper vehicle service. The procedures should not be performed by "do-it-yourselfers". Do not assume that a condition
described affects your car or truck. Contact a Ford or Lincoln dealership to determine whether the Bulletin applies to your vehicle. Warranty Policy
and Extended Service Plan documentation determine Warranty and/or Extended Service Plan coverage unless stated otherwise in the TSB article.
The information in this Technical Service Bulletin (TSB) was current at the time of printing. Ford Motor Company reserves the right to supersede
this information with updates. The most recent information is available through Ford Motor Company's on-line technical resources.