Technical Service Bulletin (TSB)
Door Hem Aluminum Body Panel Corrosion Repair
REFERENCE:

TSB: 31-001-26
GROUP: 31 - Collision

VEHICLES
AFFECTED:

2018 - 2026 (JL) Jeep Wrangler
2020 - 2026 (JT) Jeep Gladiator

Date:

February 17, 2026

REVISION: —

MARKET APPLICABILITY:
NA

MEA

SA

IAP

EE

CH

NOTE: This bulletin applies to
North America, Enlarged
Europe, China, Middle
East & Africa and South
America markets.
CUSTOMER
SYMPTOM:

Customers may experience the following:
● Filifom corrosion at the hem area of the door.

CAUSE:

Corrosion

REPAIR SUMMARY:
This bulletin involves removing corrosion and refinishing the hem area on the vehicle door.
CLAIMS DATA:

Labor Operation No:
23-75-53-07

23-75-54-07

Failure Code

Labor Description
JL/JT Front Lower Inner
Door Hem Flange Repair
(1 - Semi-Skilled)
JL/JT Rear Lower Inner
Door Hem Flange Repair
(1 - Semi-Skilled)
ZZ

NOTE: $46.46 material allowance.

Skill Category
6 - Electrical and Body
Systems

Labor Time
3.9 Hrs.

6 - Electrical and Body
Systems

3.9 Hrs.

Service Action

M31 FSAR-TSB-6922

-2-

SPARE PARTS:

Qty
(AR)
(AR)

Part No.
NPN
NPN

(AR)

NPN

(AR)
(AR)

NPN
NPN

Description
3M Clean & Strip Disc
PPG SX533 Aluminum
Cleaner
PPG SX503 Aluminum
Conditioner
F4921 Epoxy Primer
3M Cavity Wax

Notes

DIAGNOSIS:
If the customer describes a symptom/condition above, perform the repair procedure.
REPAIR PROCEDURE:
1. Remove door and place on a padded stand to protect the A-side surface of the door.
2. Remove the trim panel and carrier plate. Hinges can remain in place.
3. Remove factory applied seam sealer and clean any pitted areas using a 3M Clean & Strip disc or
equivalent abrasive wheel.
4. Feather edge the existing OEM coating area beyond the bare aluminum areas with 320-400 grit sandpaper
Fig. 1.

Fig. 1
Door Removed

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M31 FSAR-TSB-6922

5. Apply PPG’s SX533 Aluminum Cleaner, or equivalent, using a 1:3 mix ratio with water using an acidresistant brush or synthetic scuff pad, paying close attention to the deeply pitted areas Fig. 2. Allow to
react two to three minutes before rinsing with cool, clean water. Rinse water should rinse over the entire
surface being treated.

Fig. 2
Aluminum Cleaner Applied
6. Apply PPG’s SX503 Aluminum Conditioner or equivalent, as packaged. Allow to react for one to three
minutes, until a golden or tan color appears. Rinse well with cool, clean water and dry thoroughly Fig. 2.
7. Clean the area to be refinished with mild soap and water and wax and grease remover prior to masking.
8. Mask the inside of the door using the reverse taping technique around the outer perimeter of the door to
reduce any edge build-up of paint material Fig. 3.

Fig. 3
Area Masked

M31 FSAR-TSB-6922

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9. Prepare a narrow blend area on both sides of the door in the area shown Fig. 4 and Fig. 5.

Fig. 4
Narrow Blend Area

Fig. 5
Narrow Blend Area

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M31 FSAR-TSB-6922

10. Apply one to two coats of F4921 Epoxy Primer or equivalent Fig. 6.

Fig. 6
Epoxy Primer
11. Melt in the edges of the epoxy primer Fig. 7.

Fig. 7
Melted Edges Of Epoxy Primer
CAUTION!
Allow one-hour dry time or force dry for 25 min at 60 ⁰C (140 ⁰F) for the epoxy primer to dry before
applying seam sealer.

M31 FSAR-TSB-6922

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12. Apply 2K seam sealer in the hinge opening areas and along the entire exposed hem seam Fig. 8, reducing
the width and feathering the seam sealer just prior to both blend areas Fig. 9 and Fig. 10.
NOTE: Add hem sealer to the bottom and sides of the door skin hem. The areas near the belt line
can be narrowed to reduce a blunt appearance near the blend area.

Fig. 8
Hem Sealer Applied To The Bottom And Sides Of The Door Skin Hem

Fig. 9
Seam Sealer

Fig. 10
Seam Sealer Drying

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M31 FSAR-TSB-6922

13. Apply primer sealer for uniform hiding and adhesion prior to basecoat Fig. 11.
NOTE: If pits or sanding/grinding marks are noticeable, apply primer surfacer (not shown) to
achieve filling.

Fig. 11
Primer Sealer
14. Apply basecoat color to achieve hiding and color match, blend color then clearcoat Fig. 12.
NOTE: Allow clearcoat to air dry overnight or force dry for 25 minutes at 60 ⁰C (140 ⁰F).

Fig. 12
Blended Color And Clearcoat

M31 FSAR-TSB-6922

-8-

15. Melt in clearcoat overspray in the blend area Fig. 13, Fig. 14 and Fig. 15.

Fig. 13
Melting In Clearcoat Overspray

Fig. 14
Melting In Clearcoat Overspray

-9-

Fig. 15
Melting In Clearcoat Overspray
16. Check for clearcoat buildup on the edge of the hem Fig. 16.

Fig. 16
Edge Of Hem

M31 FSAR-TSB-6922

17. Apply masking tape to drain holes/openings at the bottom of the door as shown to prevent overspray.
18. Apply 3M's Cavity Wax or equivalent to the inside of the door shell between the door skin and door shell
frame Fig. 17.

Fig. 17
Applying Cavity Wax
NOTE: For SA market only, after applying this TSB, it is not necessary to send DID-I or DID-A.
POLICY:
Reimbursable within the provisions of the warranty.
This bulletin is supplied as technical information only and is not an authorization for repair. No part of this publication may be reproduced, stored in a retrieval system, or
transmitted, in any form or by any means, electronic, mechanical, photocopying, or otherwise, without written permission of FCA US LLC.