The 2021 Acura RDX has 21 drivetrain parts with verified fitment on this page — 5 part types and 8 brands, covering the 2.0L L4 Turbocharged engine. Each part includes a manufacturer part number and application notes.
The drivetrain system on the 2021 Acura RDX moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware. The largest groups are CV Axle (10 parts), Transfer Case Fluid (6 parts) and Axle Shaft Seal (3 parts). The other 2 part types cover the remaining 2 parts.
Every part on this page is matched to the 2.0L L4 Turbocharged — the only engine offered in the 2021 Acura RDX.
The most listed brands for 2021 Acura RDX drivetrain parts are VALVOLINE (6 parts), TRAKMOTIVE (5 parts) and GSP (4 parts), plus 5 more brands.
4 parts on this 2021 Acura RDX page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including GSP NCV21071 (CV Axle) and VALVOLINE VV820 (Transfer Case Fluid). Click any part number to see every vehicle that part fits.
Axle Shaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SKF | 13702A | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rear | View on Amazon |
| TIMKEN | SL260478 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rear | View on Amazon |
| WJB / INMOTION PARTS | WS13702A | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rear1.378 Shaft Diameter | View on Amazon |
This table covers the seals where an axle shaft exits the housing. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.
3 Axle Shaft Seal parts for the 2021 Acura RDX come from 3 brands — SKF, TIMKEN and WJB / INMOTION PARTS.
This group includes SKF 13702A, TIMKEN SL260478 and WJB / INMOTION PARTS WS13702A.
CV Axle
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GSP Popular | NCV21071 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front Left | View on Amazon |
| TRAKMOTIVE Popular | HO86040 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | AAR Joint Design | View on Amazon |
| GSP | NCV21072 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front Right | View on Amazon |
| GSP | NCV21097 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rear Left | View on Amazon |
| GSP | NCV21096 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rear Right | View on Amazon |
| TOP NOTCH | TN50312 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rear Left | View on Amazon |
| TOP NOTCH | TN50311 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rear Right | View on Amazon |
| TRAKMOTIVE | HO86044 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | AAR Joint Design | View on Amazon |
| TRAKMOTIVE | HO86042 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | AAR Joint Design | View on Amazon |
| TRAKMOTIVE | HO86038 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | AAR Joint Design | View on Amazon |
This table covers the complete CV axle shafts from differential (or hub) to wheel. Typical signs include a click in tight turns, grease flung around the wheel well, or a vibration that builds with speed. A torn boot caught early is a boot kit; caught late it is the whole axle. Torque the axle nut to the method in the notes.
10 CV Axle parts for the 2021 Acura RDX come from 3 brands — GSP, TRAKMOTIVE and TOP NOTCH. The "Popular" part is GSP NCV21071.
CV Intermediate Shaft
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TRAKMOTIVE | HO3550 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front | View on Amazon |
This table covers the CV Intermediate shafts.
One part is listed for the 2021 Acura RDX — TRAKMOTIVE HO3550.
Differential Oil Temperature Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BECK/ARNLEY | 1581807 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the Differential Oil temperature sensors. Typical signs include hard cold starts, a fan that never comes on, or a gauge that disagrees with the scan tool. A sensor that reads open or shorted is usually the part; an implausible-but-smooth reading can be wiring.
This group shows a single part: BECK/ARNLEY 1581807.
Transfer Case Fluid
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Popular | VV820 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Daily Protection SAE 75W-90 Gear Oil1 Quart | View on Amazon |
| VALVOLINE Popular | VV975 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Advanced Full Synthetic SAE 75W-90 Gear Oil1 Quart | View on Amazon |
| VALVOLINE | 889785 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Full Synthetic SAE 75W-90 Gear Oil1 Quart Flex Fill | View on Amazon |
| VALVOLINE | 882505 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Advanced Full Synthetic SAE 75W-90 Gear Oil1 Gallon | View on Amazon |
| VALVOLINE | 723856 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Advanced Full Synthetic SAE 75W-90 Gear Oil5 Gallon | View on Amazon |
| VALVOLINE | VV822 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Daily Protection SAE 75W-90 Gear Oil16 Gallon KEG | View on Amazon |
This table covers the fluids specified for the transfer case. Typical signs include discolored fluid, a burnt smell, or a level that keeps dropping. Use only the specification in the notes — the tables group grades because they are not interchangeable.
6 Transfer Case Fluid parts for the 2021 Acura RDX come from VALVOLINE. The "Popular" part is VALVOLINE VV820.
Part numbers include VALVOLINE VV820, VALVOLINE VV975 and VALVOLINE 889785, among others listed above.
Buying Drivetrain Parts for a 2021 Acura RDX
On this vehicle, the drivetrain system moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware.
- Confirm you have the 2.0L L4 Turbocharged engine — every part on this page is matched to it.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace the differential or transfer-case fluid with any axle or seal job while everything is already open.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: CV Axle and Transfer Case Fluid .
Frequently Asked Questions
How many drivetrain parts fit the 2021 Acura RDX?
Our catalog currently lists 21 drivetrain parts for the 2021 Acura RDX across 5 subcategories and 8 brands, covering the 2.0L L4 Turbocharged engine. Each part is matched to the engine(s) it fits.
What are the signs of drivetrain problems on a 2021 Acura RDX?
Common symptoms include clicking in tight turns, a clunk when shifting between drive and reverse, vibration that builds with speed, or gear oil on the inside of a wheel. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, replace the differential or transfer-case fluid with any axle or seal job while everything is already open.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2021 Acura RDX was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2021 Acura RDX?
Every part on this page is matched to the 2.0L L4 Turbocharged engine. Then a torn CV boot caught early is a cheap boot kit; caught late it is a whole axle — inspect before deciding which to buy. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2021 Acura RDX
Drivetrain Parts for Other Acura RDX Years
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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.