19 Automatic transmission parts are listed for the 2021 Nissan Frontier, in 5 part types, covering all 3 engine options (2.5L L4, 2.5L L4 DIESEL Turbocharged and 3.8L V6). Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 2021 Nissan Frontier, the automatic transmission covers the automatic gearbox and its supporting cast — filters, coolers, solenoids, mounts and torque-converter parts. Most of the listed parts are Transmission Fluid Additive (6 parts), Transmission Fluid (5 parts) and Transmission Mount (4 parts). The other 2 part types cover the remaining 4 parts.
The 2021 Nissan Frontier was sold with 3 engines. 9 parts fit every engine; the other 10 are engine-specific. Each part shows which engine(s) it fits.
9 brands supply automatic transmission parts for the 2021 Nissan Frontier, led by LUBEGARD (6 parts), LIQUI MOLY (3 parts) and PENTOSIN (2 parts), plus 6 more brands.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2021 Nissan Frontier. 3 parts have it, including LIQUI MOLY 20032 (Transmission Fluid) and LUBEGARD 19610 (Transmission Fluid Additive). Each part number opens a page with every vehicle that part fits.
Fluid Cooler
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TECHPRO Fits: all 2021 Frontier engines | NI4050101 | 🇺🇸 US 🇲🇽 MX | View on Amazon | |
| TYC Fits: 3.8L V6 | 19182 | 🇺🇸 US | View on Amazon | |
| VARIOUS MFR Fits: all 2021 Frontier engines | NI4050101 | 🇺🇸 US 🇲🇽 MX | View on Amazon |
This table covers the heat exchangers that cool transmission fluid. Typical signs include fluid that overheats, a leak at the cooler fittings, or milky fluid that says coolant and ATF have mixed. Flush the lines when you replace a cooler. Cross-contamination is how a small leak becomes a transmission job.
3 Fluid Cooler parts are listed for the 2021 Nissan Frontier, from TECHPRO, TYC and VARIOUS MFR. 2 parts fit every engine; the other 1 is engine-specific.
This group includes TECHPRO NI4050101 and TYC 19182 and the remaining parts above.
Fluid Pan
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ÜRO PARTS Fits: all 2021 Frontier engines | 7252703707 | 🇺🇸 US 🇲🇽 MX | KitIncludes 1 Transmission Oil Pan with Filter, Pan Gasket, and Drain Plug | View on Amazon |
This table covers the pans that hold automatic-transmission fluid.
This group shows a single part: ÜRO PARTS 7252703707.
Transmission Fluid
ATF 134
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PENTOSIN Fits: 3.8L V6 | 1090117 | 🇺🇸 US | ATF134-FE1 Liter | View on Amazon |
| PENTOSIN Fits: 3.8L V6 | 1090216 | 🇺🇸 US | ATF134-FE5 Liters | View on Amazon |
Multi-Vehicle
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| LIQUI MOLY Popular Fits: 3.8L V6 | 20032 | 🇺🇸 US | Top Tec ATF 18001 Liter | View on Amazon |
| LIQUI MOLY Fits: 3.8L V6 | 22036 | 🇺🇸 US | Top Tec ATF 18005 Liter | View on Amazon |
| LIQUI MOLY Fits: 3.8L V6 | 20034 | 🇺🇸 US | Top TEC ATF 180020 Liter | View on Amazon |
This table covers the automatic-transmission fluids specified for this gearbox. Typical signs include harsh or delayed shifts, fluid that smells burnt, or a shudder at light throttle. Use exactly the specification in the notes. Automatic transmissions are unforgiving of the wrong fluid.
5 Transmission Fluid parts are listed for the 2021 Nissan Frontier, from LIQUI MOLY and PENTOSIN. LIQUI MOLY 20032 carries the "Popular" badge.
The ATF 134 section lists 2 options from PENTOSIN — grouped under the catalog's "ATF 134" designation — the notes column spells out what sets them apart. PENTOSIN 1090117 is listed in this group.
In the Multi-Vehicle grade, LIQUI MOLY supplies 3 parts: grouped under the catalog's "Multi-Vehicle" designation — the notes column spells out what sets them apart. A representative part number is LIQUI MOLY 20032.
Listed part numbers: LIQUI MOLY 20032, PENTOSIN 1090117 and PENTOSIN 1090216, plus the other parts above.
Transmission Fluid Additive
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| LUBEGARD Popular Fits: all 2021 Frontier engines | 19610 | 🇺🇸 US 🇲🇽 MX | Instant Shudder Fixx2 oz | View on Amazon |
| LUBEGARD Popular Fits: all 2021 Frontier engines | 60902 | 🇺🇸 US 🇲🇽 MX | Automatic Transmission Fluid Protectant10 oz | View on Amazon |
| LUBEGARD Fits: all 2021 Frontier engines | 19689 | 🇺🇸 US 🇲🇽 MX | Instant Shudder Fixx2 oz | View on Amazon |
| LUBEGARD Fits: all 2021 Frontier engines | 63010 | 🇺🇸 US 🇲🇽 MX | Platinum Universal ATF Protectant10 oz | View on Amazon |
| LUBEGARD Fits: all 2021 Frontier engines | 63016 | 🇺🇸 US 🇲🇽 MX | Platinum Universal ATF Protectant15 oz | View on Amazon |
| LUBEGARD Fits: all 2021 Frontier engines | 63032 | 🇺🇸 US 🇲🇽 MX | Platinum Universal ATF Protectant32 oz | View on Amazon |
This table covers the conditioners and additives used with this transmission fluid.
LUBEGARD supplies the 6 Transmission Fluid Additive parts for the 2021 Nissan Frontier. LUBEGARD 19610 carries the "Popular" badge. All of them fit every engine offered in the 2021 Frontier.
Part numbers include LUBEGARD 19610, LUBEGARD 60902 and LUBEGARD 19689, among others listed above.
Transmission Mount
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ANCHOR Fits: 3.8L V6 | 10327 | 🇺🇸 US | RearRWD | View on Amazon |
| ANCHOR Fits: 3.8L V6 | 10346 | 🇺🇸 US | Rear4WD | View on Amazon |
| DEA / MARMON RIDE CONTROL Fits: 3.8L V6 | A43016 | 🇺🇸 US | Rear4WD | View on Amazon |
| DEA / MARMON RIDE CONTROL Fits: 3.8L V6 | A43015 | 🇺🇸 US | RearRWD | View on Amazon |
This table covers the mounts that hold the transmission to the chassis. Typical signs include a clunk on takeoff, a vibration at idle, or a separated rubber insert. Support the powertrain before unbolting a mount, and torque the fasteners in the notes.
4 Transmission Mount parts for the 2021 Nissan Frontier come from 2 brands — ANCHOR and DEA / MARMON RIDE CONTROL.
Listed part numbers: ANCHOR 10327, ANCHOR 10346 and DEA / MARMON RIDE CONTROL A43016, plus the other parts above.
Buying Automatic Transmission Parts for a 2021 Nissan Frontier
On this vehicle, the automatic transmission covers the automatic gearbox and its supporting cast — filters, coolers, solenoids, mounts and torque-converter parts.
- Match the engine first. Some automatic transmission parts fit every engine; others are engine-specific. Each row shows which engine(s) it fits.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace the filter and pan gasket with every fluid service, and flush the cooler lines when replacing a failed unit.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Transmission Fluid Additive and Transmission Fluid .
Frequently Asked Questions
How many automatic transmission parts fit the 2021 Nissan Frontier?
Our catalog currently lists 19 automatic transmission parts for the 2021 Nissan Frontier across 5 subcategories and 9 brands, covering all 3 engine options (2.5L L4, 2.5L L4 DIESEL Turbocharged and 3.8L V6). Each part is matched to the engine(s) it fits.
Do automatic transmission parts differ between 2021 Nissan Frontier engines?
Some do. 9 parts fit every engine; the other 10 are engine-specific. Each row (and the filter at the top) shows which. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of automatic transmission problems on a 2021 Nissan Frontier?
Common symptoms include delayed or harsh engagement, slipping under load, fluid that smells burnt, or shuddering at light throttle around 40 mph. 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 filter and pan gasket with every fluid service, and flush the cooler lines when replacing a failed unit.
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 Nissan Frontier 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 Nissan Frontier?
First match the engine — each row shows which engine(s) the part fits. Then use exactly the fluid specification in the notes — automatic transmissions are the least forgiving component on the vehicle about fluid choice. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2021 Nissan Frontier
Automatic Transmission Parts for Other Nissan Frontier Years
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