Safety Recall: 2021 Acura RDX Left Side Front Driveshaft

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December 3, 2021
Version 1

Safety Recall: 2021 RDX Left Side Front Driveshaft



Year Model Trim VIN Range
2021 RDX ALL Check the iN VIN status for eligibility.



A small number of 2021 RDXs were manufactured with left side front driveshafts that have constant velocity joints (CV Joint) which were improperly manufactured. If the complete driveshaft is not replaced it could result in premature wear, excessive noise, vibration, and over time possible part failure. The affected vehicles will only have a left side front driveshaft that will need to be replaced. No vehicles will require both front drive shafts to be replaced. The VIN inquiry system will identify which vehicle needs the left side front driveshaft to be replaced.



Owners of affected vehicles will be sent a notification of this campaign.

Do an iN VIN status inquiry to make sure the vehicle is shown as eligible.

Some vehicles affected by this campaign may be in your new or used vehicle inventory.

Failure to repair a vehicle subject to a recall or campaign may subject your dealership to claims or lawsuits from the client or anyone else harmed as a result of such failure. To see if a vehicle in inventory is affected by this safety recall, do a VIN status inquiry before selling it.



Replace the left side front driveshaft.



Part Name Part Number Quantity
Left Driveshaft Assembly 44306-TJB-A51 1
Spindle Nut 90305-S3V-A11 1
Split Pin 94201-30220eBay 1
Self Lock Nut 90370-SJA-000 3
Drain Plug Washer (18 mm) 90471-PX4-000 1
Drain Plug Washer (20 mm) 94109-20000 1



Part Name Part Number Quantity
ATF-TYPE 2.0 (5 qty for 2WD & 6 qty for AWD) 08200-9015A 5-6
M77 (One tube will repair 12 vehicles) 08798-9010 1



1. Put the vehicle on a lift.

2. Remove the engine undercover.


3. Remove the drain plug with the sealing washer and drain the ATF.


4. Install the new drain plug with the sealing washer.

5. Remove the filler plug with the sealing washer.

6. Remove the left front wheel.


7. Disconnect the tie rod end ball joint.


8. Remove the 3 nuts holding the left lower ball joint in place, then disconnect the lower arm ball joint.


9. Pry up on the stake on the spindle nut.


10. Remove the spindle nut.

11. Remove the outer joint.


12. Pry the inboard joint using a pry bar.

NOTE: Be careful not to damage the oil seal or the end of the inboard joint.

13. Remove the driveshaft as an assembly.

NOTE: Do not pull on the driveshaft, or the inboard joint may come apart. Pull the inboard joint straight out to avoid damaging the oil seal.

14. Make sure the set ring is in the groove on the new left driveshaft. Then, insert the inboard end of the driveshaft into the differential.


15. Make sure the bearing and spindle are clean of any debris or rust particles using a shop towel and/or compressed air. Then apply about 3 g (0.11 oz) of M-77 Assembly Paste (P/N 08798-9010) to the contact area of the outboard joint and the front wheel bearings, then install the outboard joint.


16. Apply oil or lube to the spindle nut surface only. Do not apply any to the threads of the spindle or nut.

17. Insert the outer driveshaft through the knuckle.

NOTE: During installation, apply specified grease to the contact area shown.


18. Install the new spindle nut and torque it to 328 N.m (242 lb-ft) using a torque wrench. If you are going to use an Air or Battery Powered Impact Gun to install the nut, make sure to turn down the air or power so you do not over tighten it, then torque it to specification using a torque wrench.


  • Do not use a stake, punch or screwdriver in the brake rotor to keep it from moving. Have an assistant press on the brakes while you are tightening.
  • Be careful not to make a crack on the spindle nut when staking.


19. Connect the lower ball joint and torque the nuts to 64 N.m (47 lb-ft).

NOTE: During assembly, loosely install the new flange nuts then, tighten to the specified torque in the numbered sequence shown.


20. Install the tie rod.

21. Install the front wheel.

22. Turn the wheel by hand and make sure there is not interference between the driveshaft and surrounding parts.

23. Refill the transmission with the recommended fluid through the filler plug hole.

NOTE: Using the wrong type of fluid will damage the transmission.

Type Operation Specifications
Without AWD At Fluid Change 4.3L (4.5 US qt)
At Overhaul 8.3 L (8.8 US qt)
With AWD At Fluid Change 4.8 L (5.1 US qt)
At Overhaul 8.8 L (9.3 US qt)


24. Temporally install the filler plug with the old washer.


  • Check the ATF level right after shifting the transmission through all of the positions/modes and turning the engine OFF.
  • There are two types of level plugs, integrated washer type and separated washer type.


25. Start the engine.

26. While pressing the brake pedal firmly, shift the transmission to P-R-N-D-S-2nd-S-D-N-R-P position/mode, and wait at least 3 seconds in each position/mode.

NOTE: To shift to 2nd gear, enter the sequential sportshift mode by pressing the paddle shifter while in the S position/mode.

27. Turn the engine OFF.

28. Integrated washer type: Remove the level plug.

29. Separated washer type: Remove the level plug with the sealing washer.

30. Make sure the ATF level is at the proper level.

Normal Conditions

Proper Transmission Fluid (ATF) Level.
The ATF is dripping from the level plug hole.


31. If necessary, remove the filler plug with the sealing washer, and add the recommended fluid through the filler plughole until the ATF overflows from the level plug hole.


32. Install the engine undercover.

33. Check the wheel alignment.

34. Test drive the vehicle.



21V939 – Driveshaft May Fail – 2021 Acura RDX & 2022 Honda CR-V Hybrid


21V939 – Driveshaft May Fail – 2021 Acura RDX & 2022 Honda CR-V Hybrid


Remedy Instructions and TSB

RCRIT-21V939-6923.pdf 627.035KB

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