Service Bulletin
October 6, 2017

17-026
07461 Version 3

Warranty Extension: MDX Transmission Chirps During 3-4 Shift, Poor
Shift Quality, or Engine Overheats Because of Defective ATF Warmer
Supersedes 17-026, dated September 22, 2017 to revise the information highlighted in yellow
AFFECTED VEHICLES
Year
Model
2016
MDX
2017
MDX

Trim
ALL
ALL

VIN Range
Check the iN VIN status for eligibility
Check the iN VIN status for eligibility
(Only five MDX VINS are affected)

REVISION SUMMARY
Under PARTS INFORMATION, several parts were added or removed. Additionally, some part numbers were changed.
BACKGROUND
American Honda is extending the warranty on the 9-speed transmission warmers to 10 years from the original date of
purchase with unlimited mileage.
This warranty covers vehicles where the engine coolant and ATF mix because of an internal leak in the 9-speed
transmission warmer.
No fluid will be visible outside of the warmer.
If the transmission warmer leaks, it may cause one or more of the following symptoms:
• The vehicle overheats
• The transmission shifts poorly
• The transmission chirps during 3-4 shift
This bulletin only applies to vehicles where the client came in with at least one of the listed complaints and the
warmer fails the pressure test.
Transmission warmers may be called in for inspection and if they are found to be not leaking, your claim will be
subject to debit.
This warranty extension will not apply to any vehicle that has ever been declared a total loss or sold for salvage by a
financial institution or insurer, or has a branded or similar title under any state’s law.
CLIENT NOTIFICATION
Owners of affected vehicles will be sent a notification of this warranty extension.
Do an iN VIN status inquiry to make sure the vehicle is shown as eligible.

CLIENT INFORMATION: The information in this bulletin is intended for use only by skilled technicians who have the proper tools, equipment,
and training to correctly and safely maintain your vehicle. These procedures should not be attempted by “do-it-yourselfers,” and you should not
assume this bulletin applies to your vehicle, or that your vehicle has the condition described. To determine whether this information applies,
contact an authorized Acura automobile dealer.

© 2017 American Honda Motor Co., Inc. – All Rights Reserved

Page 1 of 54

CORRECTIVE ACTION
Inspect the vehicle and, based on your inspection, do one of the following:
• The transmission warmer is OK. Continue with normal troubleshooting.
• Replace the transmission, radiator, coolant hoses, thermostat, coolant reserve tank, ECT (1 and 2) sensor O-rings
and flush the cooling system.
• Replace the short block, cylinder heads, transmission, radiator, thermostat, coolant reserve tank, all of the coolant
hoses, the 2 ECT sensor (1 and 2) O-rings, water passage, water connecting pipe, and flush the heater core.
NOTE: Photos are required every time a transmission is replaced - see page 16. Any transmission replacement
claims that do not include the required photos may be subject to debit.
The flowchart below provides a summary to help navigate the inspection and repair procedure. Make sure you read the
service bulletin steps thoroughly for the detailed repair information.
Start

This ATF warmer is not
the problem. Continue
with normal
troubleshooting.

Good

Check the coolant for
contamination and pressure
test the ATF warmer.

No Good

Did the vehicle overheat?

No

- Replace
transmission,
radiator, and
hoses.
- Flush engine.

Yes

- Replace engine, transmission,
radiator, and hoses
- Flush heater core.

End

Page 2 of 54

WARRANTY CLAIM INFORMATION
Inspect Warmer Only
Operation
Number

Description

Flat Rate
Time

Defect
Code

Symptom
Code

Template
ID

Failed Part
Number

2325A1

Inspect the ATF warmer,
reinstall the original warmer
with new O-Rings

2.1 hrs

6A900

KG900

B17026A

06200-5NB-A58

2325A1

Inspect the ATF warmer,
reinstall the original warmer
with new O-Rings (with
accessory external
transmission cooler)

2.1 hrs

6A900

KG900

B17026Z

06200-5NB-A58

Inspection and Repair Procedure A – 2WD
NOTE: Photos must be submitted with any warranty claim where the transmission is replaced – see page 16. Any
transmission replacement claims that do not include the required photos may be subject to debit.
Operation
Number
2185C8

Description

2WD - Inspect the ATF
warmer, check vehicle
for overheating and do
REPAIR PROCEDURE
A.

Transmission
Replacement
Number
06200-5NB-A58RM

Flat
Rate
Time

Defect
Code

Symptom
Code

Template
ID

Failed Part
Number

10.5 hrs

6A900

KG900

B17026B

06200-5NB-A58

10.5 hrs

6A900

KG900

B17026E

06200-5NB-A58

- Replace transmission,
radiator, and hoses
- Flush engine
- Includes photos,
updating PCM/TCM,
idle learn and
alignment
2185C8

2WD - Inspect the ATF
warmer, check vehicle
for overheating and do
REPAIR PROCEDURE
A.

06200-5NB-A58RM

- Replace transmission,
radiator, and hoses
- Flush engine
- Includes photos,
updating PCM/TCM,
idle learn and
alignment
A

Add if the vehicle has
an accessory external
transmission cooler.

0.9 hr

Page 3 of 54

Inspection and REPAIR PROCEDURE A – 2WD with ACC
Operation
Number
2185C8

Description

2WD with ACC Inspect the ATF
warmer, check vehicle
for overheating and do
REPAIR PROCEDURE
A.

Transmission
Replacement
Number
06200-5NB-A68RM

Flat
Rate
Time

Defect
Code

Symptom
Code

Template
ID

Failed Part
Number

10.5 hrs

6A900

KG900

B17026C

06200-5NB-A58

10.5 hrs

6A900

KG900

B17026F

06200-5NB-A58

- Replace transmission,
radiator, and hoses
- Flush engine
- Includes photos,
updating PCM/TCM,
idle learn and
alignment
2185C8

2WD - Inspect the ATF
warmer, check vehicle
for overheating and do
REPAIR PROCEDURE
A.

06200-5NB-A68RM

- Replace transmission,
radiator, and hoses
- Flush engine
- Includes photos,
updating PCM/TCM,
idle learn and
alignment
A

Add if the vehicle has
an accessory external
transmission cooler.

0.9 hr

Page 4 of 54

Inspection and REPAIR PROCEDURE A – 2WD with ACC and Idle-stop
Operation
Number
2185C8

Description

2WD with ACC and
Idle-stop - Inspect the
ATF warmer, check
vehicle for overheating
and do REPAIR
PROCEDURE A.

Transmission
Replacement
Number
06200-5NB-A78RM

Flat
Rate
Time

Defect
Code

Symptom
Code

Template
ID

Failed Part
Number

10.5 hrs

6A900

KG900

B17026D

06200-5NB-A58

10.5 hrs

6A900

KG900

B17026G

06200-5NB-A58

- Replace transmission,
radiator, and hoses
- Flush engine
- Includes photos,
updating PCM/TCM,
idle learn and
alignment
2185C8

2WD with ACC and
Idle-stop - Inspect the
ATF warmer, check
vehicle for overheating
and do REPAIR
PROCEDURE A.

06200-5NB-A78RM

- Replace transmission,
radiator, and hoses
- Flush engine
- Includes photos,
updating PCM/TCM,
idle learn and
alignment
A

Add if the vehicle has
an accessory external
transmission cooler.

0.9 hr

Page 5 of 54

Inspection and Repair Procedure A – AWD
NOTE: Photos must be submitted with any warranty claim where the transmission is replaced – see page 16. Any
transmission replacement claims that do not include the required photos may be subject to debit.
Operation
Number
2185C9

Description

AWD - Inspect the ATF
warmer, check vehicle
for overheating and do
REPAIR PROCEDURE
A.

Transmission
Replacement
Number
06200-5NC-A59RM

Flat
Rate
Time

Defect
Code

Symptom
Code

Template
ID

Failed Part
Number

10.9 hrs

6A900

KG900

B17026H

06200-5NB-A58

10.9 hrs

6A900

KG900

B17026K

06200-5NB-A58

- Replace transmission,
radiator, and hoses
- Flush engine
- Includes photos,
updating PCM/TCM,
idle learn and
alignment
2185C9

AWD - Inspect the ATF
warmer, check vehicle
for overheating and do
REPAIR PROCEDURE
A.

06200-5NC-A59RM

- Replace transmission,
radiator, and hoses
- Flush engine
- Includes photos,
updating PCM/TCM,