Revision 2 April 2023
Dealer Service Instructions for:

Customer Satisfaction Notification ZD8
Coolant Leak
NOTE: Added additional steps and LOP number for PHEV vehicles.

Remedy Available
2021-2022 (JL) Jeep Wrangler
NOTE: This campaign applies only to the above vehicles equipped with a 2.0L
engine (sales code EC1, EC3 & ECX).
NOTE: Some vehicles above may have been identified as not involved in this
campaign and therefore have been excluded from this campaign.
IMPORTANT: Some of the involved vehicles may be in dealer new vehicle
inventory. Dealers should complete this campaign service on these vehicles
before retail delivery. Dealers should also perform this repair on vehicles in used
vehicle inventory and those vehicles in for service. Involved vehicles can be
determined by using the VIP inquiry process.

Subject
The coolant inlet tube fasteners on about 90,811 of the above vehicles may become
loose and allow a coolant weep that may propagate into a drip. Loss of coolant can
cause the engine to overheat and, if not addressed, can lead to engine failure.

Repair
Remove the coolant inlet tube fasteners each separately. Clean the threads and add
Thread Loc to the threads and reinstall, tighten to 11N∙m (8ft. lbs.).
© Copyright 2022, FCA US LLC, All Rights Reserved

(kka)

Customer Satisfaction Notification ZD8 – Coolant Leak

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Parts Information
Part Number

Description

04318031

Lock & Seal Adhesive (MS-90061) MSQ of 12

NOTE: One tube will cover many vehicles.
Dealers are not to charge for the entire tube of Lock& Seal Adhesive
on each claim.
Parts Return
No parts return required for this campaign.

Special Tools

No special tools are required to perform this service procedure.

Customer Satisfaction Notification ZD8 – Coolant Leak

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Service Procedure
WARNING: Do not remove or loosen the coolant pressure cap, cylinder
block drain plugs, or the draincock when the system is hot and under
pressure because serious burns from the coolant can occur.
1. PHEV equipped: Using the scan tool, verify there are no stuck contactors
DTCs active or stored. If DTCs are present, the high voltage system may not
power down properly. Address the DTCs before continuing power down
procedure.
2. PHEV equipped: Disconnect any charging equipment. Do not plug in the
EVSE Recharge Coupler when working on the vehicle.
3. PHEV equipped: Turn the ignition to Off by pressing the stop button and
move keys at least 20 feet away from the vehicle. Wait five minutes to allow
the high voltage system to shut down without setting a fault code.
4. Disconnect and isolate the negative battery cable from the 12-volt battery
negative post.
5. PHEV equipped: Access the high voltage test
points access cover and remove the M6 Torx
screws.
6. PHEV equipped: Remove the cover to open
the internal High Voltage Interlock (HVIL) loop
(Figure 1).
NOTE: The high voltage test points access
cover is located on the battery pack, behind
driver side seat.

Figure 1 – Access Cover

Customer Satisfaction Notification ZD8 – Coolant Leak

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Service Procedure [Continued]
7. PHEV equipped: Use of an insulation tester such as the Fluke Meter, Multi
126-1587 is recommended for PHEV circuit testing. Perform the multi-meter
functionality tests per the manufactures directions. Verify the multi-meter is
operating correctly by measuring voltage from a known good power source,
such as the vehicle’s 12-volt battery. If at any point during the procedure, the
multi-meter settings are changed, or the probes are repositioned in the meter,
verification with a known good power source must be repeated.
8. PHEV equipped: Using the Fluke multi-meter, measure the voltage at the high
voltage positive and high voltage negative test points (Figure 2).
➢
➢
➢

➢

Measure for voltage between the positive and negative high voltage test points.
Measure for voltage between positive test point and chassis ground.
Measure for voltage between negative test point and chassis ground.
The voltage reading should be 0 volts. (Some residual voltage may be present, up to 2.0 volts
may be normal.)

9. PHEV equipped: Measure the voltage between
the Power Distribution Center (PDC) positive
battery cable connection and chassis ground with a
multi-meter to verify the vehicle electrical system
is powered down (Figure 2).
NOTE: On some vehicles a small amount of
voltage may be present (typically less than
approximately 0.5 volts) due to capacitors is
some modules still having voltage stored.
Anything less than 1.0 volts should be safe to
work on.
10. Raise and support the vehicle.

Figure 2 – Test Points

Customer Satisfaction Notification ZD8 – Coolant Leak

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Service Procedure [Continued]
11. Remove one of the coolant inlet tube fasteners (1), clean threads and add thread
Loctite (Figure 3).
12. Install the fastener and tighten the
fastener to 11N∙m (8ft. lbs.).
13. Repeat with the other fastener.
14. PHEV equipped: Install the high
voltage test points access cover to
close the internal High Voltage
Interlock (HVIL) loop (Figure 1).
15. PHEV equipped: Install the M6
Torx screws securing the cover.

Figure 3 – Fasteners

16. Reconnect the 12-volt negative battery cable.
17. PHEV equipped: Clear any DTCs that may have set due to the power down.
18. Check coolant level, add as necessary.
19. Check for coolant leak.
20. Return the vehicle to the customer.

Customer Satisfaction Notification ZD8 – Coolant Leak

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Completion Reporting and Reimbursement
Claims for vehicles that have been serviced must be submitted on the
DealerCONNECT Claim Entry Screen located on the Service tab. Claims paid
will be used by FCA to record Customer Satisfaction Notification service
completions and provide dealer payments.
Use the following labor operation number and time allowance:
Labor Operation
Number

Time
Allowance

Add Thread Loc to Inlet tube fasteners

07-ZD-81-82

0.6 hours

Related LOP
PHEV vehicles ONLY

08-00-01-51

0.4 hours

NOTE: See the Warranty Administration Manual, Recall Claim Processing
Section, for complete claim processing instructions.

Dealer Notification
To view this notification on DealerCONNECT, select “Global Recall System” on
the Service tab, then click on the description of this notification.

Owner Notification and Service Scheduling
All involved vehicle owners known to FCA are being notified of the service
requirement by mail. They are requested to schedule appointments for this service
with their dealers. A generic copy of the owner letter is attached.

Customer Satisfaction Notification ZD8 – Coolant Leak

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Vehicle Lists, Global Recall System, VIP and Dealer Follow Up
All involved vehicles have been entered into the DealerCONNECT Global Recall
System (GRS) and Vehicle Information Plus (VIP) for dealer inquiry as needed.
GRS provides involved dealers with an updated VIN list of their incomplete
vehicles. The owner’s name, address and phone number are listed if known.
Completed vehicles are removed from GRS within several days of repair claim
submission.
To use this system, click on the “Service” tab and then click on “Global Recall
System.” Your dealer’s VIN list for each campaign displayed can be sorted by:
those vehicles that were unsold at campaign launch, those with a phone number,
city, zip code, or VIN sequence.
Dealers should perform this repair on all unsold vehicles before retail
delivery. Dealers should also use the VIN list to follow up with all owners to
schedule appointments for this repair.
VIN lists may contain confidential, restricted owner name and address information that was
obtained from the Department of Motor Vehicles of various states. Use of this information is
permitted for this notification only and is strictly prohibited from all other use.

Additional Information
If you have any questions or need assistance in completing this action, please
contact your Service and Parts District Manager.
Customer Service / Field Operations
FCA US LLC

This notice applies to your vehicle,

CUSTOMER SATISFACTION NOTIFICATION
Coolant Leak

[Model Year and Model]
VIN XXXXXXXXXXXXXXXXX

ZD8

LOGO

VEHICLE PICTURE

Dear [Name],
At FCA US LLC, we recognize that the success of our business depends on the satisfaction of
our customers. We are constantly monitoring the quality of our products and looking for
opportunities to improve our vehicles even after they are sold. Because your long-term
satisfaction is important to us, we are contacting you on important improvements we would
like to make to your vehicle [1]. This will be done at no charge to you.
We are recommending the following improvements be performed on certain [2021 – 2022
Model Year (JL) Jeep Wrangler] vehicles.
WHY DOES MY VEHICLE NEED REPAIRS?
The coolant inlet tube fasteners on your vehicle may become loose and allow a coolant weep
to propagate into a drip. Loss of coolant can cause the engine to overheat and, if not
addressed, can lead to engine failure.

YOUR SCHEDULING OPTIONS
1. RECOMMENDED OPTION
Call your authorized Chrysler /
Dodge / Jeep® / RAM Dealership
2. Call the FCA Recall Assistance
Center at 1-800-853-1403. An
agent
can
confirm
part
availability and help schedule an
appointment
3. Visit recalls.mopar.com, scan the
QR code below, or download the
Mopar Owner’s Companion App.

QR Code

Get access to recall notifications,
locate your nearest dealer, and more
through this website or Mopar
Owner’s Companion App. You will be
asked to provide your Vehicle
Identification Number (VIN) to
protect and verify your identity.
DEALERSHIP INSTRUCTIONS
Please reference CSN ZD8.

HOW DO I RESOLVE THIS CUSTOMER SATISFACTION NOTIFICATION?
FCA US will repair your vehicle free of charge (parts and labor). To do this, your dealer
will remove the fasteners and add thread sealant. The estimated repair time is about 1 hour. In
addition, your dealer will require your vehicle for proper check-in, preparation, and check-out
during your visit, which may require more time. Your time is important to us, so
we recommend that you schedule a service appointment to minimize your inconvenience.
Please bring this letter with you to your dealership.

TO SCHEDULE YOUR FREE REPAIR,
CALL YOUR CHRYSLER, DODGE, JEEP OR RAM DEALER TODAY
WHAT IF I ALREADY PAID TO HAVE THIS REPAIR COMPLETED?
If you have already experienced this specific condition and have paid to have it repaired, you
may visit www.fcarecallreimbursement.com to submit your reimbursement request online. [2]
Once we receive and verify the required documents, reimbursement will be sent to you within
60 days. If you have had previous repairs performed and/or already received reimbursement,
you may still need to have the repair performed.
We apologize for any inconvenience, but are sincerely concerned about your satisfaction.
Thank you for your attention to this important matter.
Customer Assistance/Field Operations
FCA US LLC

Mr. Mrs. Customer
1234 Main Street
Hometown, MI 48371

[1] If you no longer own this vehicle, please help us update our records. Call the FCA Recall Assistance Center at 1-800-853-1403 to update your information.
[2] You can also mail in your original receipts and proof of payment to the following address for reimbursement consideration: FCA Customer Assistance, P.O. Box 218004, Auburn Hills, MI 48321-8007, Attention: Recall Reimbursement.