NHTSA ID Number: 10182471
Manufacturer Communication Number: B20-041
TSB/Document Date: 2020-11-11
Summary
Service Bulletin - A chirping in the cabin with the engine running, the transmission in Drive, and the engine at operating temperature.
Service Bulletin
20-041
November 3, 2020
Version 1
Rear Engine Mount Chirps
AFFECTED VEHICLES
Year
2018
2018
2019
Model
MDX 2WD
MDX AWD
MDX
VIN Range
5J8YD3.....000303 and later
5J8YD4.....000186 and later
ALL
SYMPTOM
A chirping in the cabin with the engine running, the transmission in Drive, and the engine at operating temperature.
POSSIBLE CAUSE
An issue with the rear engine mount can cause internal components to wear prematurely. This may cause a chirping once the
engine warms up.
CORRECTIVE ACTION
Do the diagnosis and, based on the results, replace the rear engine mount.
PARTS INFORMATION
Part Name
Rubber Assy., RR. Engine Mounting (ACM)
Flange Nut (12 mm)
Flange Bolt (10 x 35)
Flange Bolt (10 x 16)
Flange Bolt ( 10 x 30)
Flange Bolt (10X25)
Ex Pipe Gasket
Ex Chamber Gasket
Self-Lock Nut (8 mm)
Self-Lock Nut (10 mm)
Pre Chamber Gasket
Part Number
50810-TZ5-A03
90371-SAA-010
90163-SDA-A01
90178-SDA-A00
90161-T2F-A01
90167-SAA-010
18212-SA7-003
18115-5G0-A01
90212-RCA-A01
90212-SA5-003
18393-SDB-A00
Quantity
1
2
1
2
2
4
2
1
4
9
1
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.
© 2020 American Honda Motor Co., Inc. – All Rights Reserved
Page 1 of 7
WARRANTY CLAIM INFORMATION
The normal warranty applies.
Operation
Number
112103
Description
Diagnose and
replace the
rear engine
mount.
Flat Rate
Time
2.0 hr.
Defect
Code
00504
Symptom
Code
04205
Template
ID
B20041A
Failed Part Number
50810-TZ5-A02
Skill Level: Repair Technician
DIAGNOSIS
1. Start the engine, and make sure it warms up to operating temperature (the cooling fans cycle twice).
2. Put the transmission in Drive, and apply the parking brake. Place a stethoscope or a long, thin screwdriver on the airbag
mounting bolt, and listen for a chirp. Click on the sound clip below to hear an example of the chirping.
•
If you hear the chirping from this location, continue to step 3.
•
•
If you hear chirping coming from the high pressure fuel pump, refer to S/B 16-008, High Pressure
Fuel Pump Chirps.
If you hear chirping coming from the timing belt area, refer to S/B 14-025, Timing Belt Chirps.
•
If you do not hear the chirping, this service bulletin does not apply. Continue with normal troubleshooting.
Page 2 of 7
3. Raise the vehicle on a lift and remove the engine undercover.
4. Unplug the connector to the rear engine mount, then lower the vehicle, and listen for the chirp at the airbag mounting
bolt again.
•
If the chirping stops, proceed to REPAIR PROCEDURE.
•
If you still hear the chirping, this bulletin does not apply. Connect the connector, and continue with normal system
troubleshooting.
Page 3 of 7
REPAIR PROCEDURE
1. Remove the transmission undercover.
2. Remove the front sub-frame stiffener.
3. Disconnect and remove the rear secondary heated oxygen sensor.
Page 4 of 7
4. Remove the exhaust pipe hanger.
5. Remove the under-floor three way catalytic converter and the gaskets.
6. Disconnect and remove the rear air/fuel ratio sensor.
Page 5 of 7
7. Remove the rear warm-up three way catalytic converter.
8. Lift and support the engine with a transmission jack and a wood block under the oil pan.
9. Remove the rear engine mount from the right front wheelhouse side.
Page 6 of 7
10. Install the new rear engine mount. Tighten and torque as shown.
11. Install all parts in reverse order of removal.
END
Page 7 of 7
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TSB/Document ID: B20-041
Replacement Service Bulletin Number:
MFR Communication Date: 2020-11-03
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE AND ENGINE COOLING
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
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