GROUP

NUMBER

CAMPAIGN
DATE

Technical Service Bulletin
SUBJECT:

24-01-066H
MODEL(S)

AUGUST 2024

SANTA FE HYBRID
(MX5A HEV)

COOLANT RESERVOIR LEAK INSPECTION AND REPLACEMENT
(SERVICE CAMPAIGN TCB)

 IMPORTANT
Dealers must perform this service campaign on all affected vehicles prior to customer retail delivery
and whenever an affected vehicle is in the shop for any maintenance or repair.
Access the “Vehicle Information” screen via WebDCS to identify open campaigns.
Description: Certain 2024MY Santa Fe Hybrid (MX5A HEV) vehicles may produce a coolant leak from
the coolant reservoir tank. This bulletin outlines the procedure to inspect and, if necessary, replace the
coolant reservoir tank to correct the condition.
Applicable Vehicles (Certain):
• 2024MY Santa Fe Hybrid (MX5A HEV) vehicles produced from 03/06/2024 to 05/07/2024.

Parts Information:
Model
Part Name

Part Number

Figure

Remarks
Replace if leaking.

Santa Fe
Hybrid

Coolant
Reservoir
Tank

25431-P7100QQH

(MX5A
HEV)
Pink Coolant

00232-19098WAR

Re-use the coolant reservoir
tank cap, hoses, and hose
clamps
Approximately ¼ gallon
(1 quart) of
coolant will be used due to
loss of coolant during the
coolant reservoir tank
replacement

NOTE 1: Dealer will be reimbursed for 1 quart of coolant.

Circulate To: General Manager, Service Manager, Parts Manager, Warranty Manager, Service
Advisors, Technicians, Body Shop Manager, Fleet Repair

SUBJECT:

COOLANT RESERVOIR LEAK INSPECTION AND REPLACEMENT (SERVICE CAMPAIGN TCB)

Required Equipment/Supplies:
Name

Figure

Remarks
Standard Shop Supply

Fluid Extractor
(Hand or Pneumatic)

Used to remove coolant from the
coolant tank reservoir.

Standard Shop Supply
Hose Pinch Clamp Pliers

Used to clamp the lower coolant
hose located on the coolant tank
reservoir.

Warranty Information:
Model

Op. Code

Santa Fe 40D097R2
Hybrid

Operation

Op.
Time

Casual Part

Coolant Reservoir Tank
Leak Inspection

0.3 M/H

25430-P7000

Nature
Code

Cause
Code

L31
ZZ7
Coolant Reservoir Tank
40D097R3
Leak Inspection and
1.0 M/H
25430-P7000
Replacement
NOTE 1: Submit claim on Claim Entry Screen as “Campaign” type.
NOTE 2: If a part is found in need of replacement while performing this campaign and the affected
part is still under warranty, submit a separate claim using the same repair order. If the affected part is
out of warranty, submit a Prior Approval request for goodwill consideration prior to performing the
work.
NOTE 3: This TSB includes Repair validation photos. Op times include VIN, Mileage and Repair
validation photos as outlined in the Digital Documentation Policy.
NOTE 4: The incident parts are subject to callback through the normal Warranty Technical Center
(WTC) parts return process. Claim is subject to debit if the part is not returned.
NOTE 5: One (1) quart of coolant will be reimbursed under labor OP code 40D097R3.
(MX5A
HEV)

TSB #: 24-01-066H

Page 2 of 7
SUBJECT:

SUBJECT: COOLANT RESERVOIR LEAK INSPECTION AND REPLACEMENT (SERVICE CAMPAIGN TCB)

Service Procedure:

STUI
This TSB includes Repair validation photos. Refer to the latest Digital Documentation Policy for
requirements.
A) Coolant Reservoir Tank Inspection
1.

Remove the coolant reservoir tank cap (A).
! CAUTION

A

If the engine has been operated, the
coolant may be hot. Be sure to allow
sufficient time to cool prior to
beginning this procedure.

2.

Remove the reservoir tank hose (B) and check
for any burrs, cracks, or coolant leaks (C)
located at the tank flange (D).

i

Example, NG
B

Information

➢ If there is NO coolant leak, crack, or burr,
then STOP. Do not continue with this
service procedure in this TSB. Use OP
Code 40D097R2 to finish the inspection
procedure.
➢ Take a picture of the tank
showing no coolant leaks /
cracks / burrs as indicated in
step 3b.
➢ Reinstall all parts in reverse
order.
➢ If a coolant leaking condition is found at
any of the indicated areas, then follow
step 3a to take a STUI photo and replace
the coolant reservoir tank in Section B.
An additional photo will be required in
Section B.
➢ Be sure to inspect for cracks
and/or burrs at multiple
locations along the flange
(90°/180°/270°)

TSB #: 24-01-066H

C

Example, NG

D

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SUBJECT:

SUBJECT:

3a.

COOLANT RESERVOIR LEAK INSPECTION AND REPLACEMENT (SERVICE CAMPAIGN TCB)

Document the coolant leaking, crack, or burr
condition at the coolant reservoir tank and/or
tank flange using STUI prior to reservoir
replacement.

Example, NG

STUI
Using STUI, take a photo any burrs,
cracks, or coolant leaks located at the
tank flange with the last 6 digits of the
VIN and the date of repair on a piece of
paper.

3b.

Document the coolant reservoir showing no
coolant leaks / cracks / burrs.

Example, OK

STUI
Using STUI, take a photo of the tank
flange with the reservoir tank hose
disconnected and the last 6 digits of
the VIN and date of inspection on a
piece of paper.
Upload the photo to STUI.

TSB #: 24-01-066H

Page 4 of 7
SUBJECT:

SUBJECT: COOLANT RESERVOIR LEAK INSPECTION AND REPLACEMENT (SERVICE CAMPAIGN TCB)

B) Coolant Reservoir Tank Replacement and Coolant Bleeding Procedure
1.

Disconnect the negative battery terminal, engine
control module connectors (A) and remove the
engine control module (ECM).
Refer to Shop Manual:
• Engine Control / Fuel System > Engine
Control System > Engine Control
Module (ECM) > Removal

NOTICE
Be sure to record the audio station
presets (XM, AM, FM, etc.) prior to
disconnecting the battery.
2.

A

Using an evacuation tool, remove the coolant
from the reservoir.
! CAUTION
If the engine has been operated, the
coolant may be hot. Be sure to allow
sufficient time to cool prior to
beginning this procedure.

3.

Remove the reservoir tank hose (B).

B

TSB #: 24-01-066H

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SUBJECT:

SUBJECT:

4.

COOLANT RESERVOIR LEAK INSPECTION AND REPLACEMENT (SERVICE CAMPAIGN TCB)

Remove the degassing hose from the reservoir
tank.

NOTICE
When disconnecting the degassing hose,
separate in the order shown to the right.

2

1

1

5.

Remove the lower cooling hose from the
reservoir tank, remove the two fasteners holding
the coolant tank reservoir, and remove the
coolant tank reservoir.

NOTICE
•

Place a hose pinch clamp plier on the
lower hose before removing to
prevent excess coolant loss.

•

Place an absorbent mat underneath
the coolant tank reservoir to capture
any coolant that may escape.

6.

STUI
Using STUI, take a clear photo of the
OLD part removed next to the NEW part
in the bag with the ‘QQH’ label showing
with the last 6 digits of the VIN and the
date of repair on a piece of paper.
Upload the photo to STUI.
NEW

TSB #: 24-01-066H

OLD

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SUBJECT:

SUBJECT: COOLANT RESERVOIR LEAK INSPECTION AND REPLACEMENT (SERVICE CAMPAIGN TCB)

7.

Install the new coolant reservoir tank in the
reverse order of removal along with other
disconnected or removed components (C & D).

NOTICE
Re-use the old coolant reservoir tank cap,
hoses, and hose clamps.
Tightening Torque:

8.

lb-ft

7.3

lb-in

87.0

N.m

9.8

C

D

Fill the coolant reservoir tank with coolant (E) as
needed.
Refer to the Shop Manual:
• Engine Mechanical System > Cooling
System > Coolant > Supplement

E

NOTICE
Be sure to follow the Integrated Thermal
Module Coolant Filling Mode procedure.
Failure to do so may result in air pockets
and overheating of engine.
9.

Start the engine and then check the coolant
reservoir tank and hose connections for any
leaks.

10.

Adjust the coolant level as necessary to the MAX
line and program the recorded radio presets.

NOTICE
Wipe off any remaining coolant residue
that may have occurred during the
reservoir tank replacement.
11.

Service Procedure is now completed.

TSB #: 24-01-066H

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