The 2021 Nissan Frontier has 32 electrical parts with verified fitment on this page — 7 part types and 14 brands, covering all 3 engine options (2.5L L4, 2.5L L4 DIESEL Turbocharged and 3.8L V6). Each part includes a manufacturer part number and application notes.
On the 2021 Nissan Frontier, the electrical system covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors. Most of the listed parts are Alternator / Generator (9 parts), Parking Aid Sensor (8 parts) and Battery (7 parts). The other 4 part types cover the remaining 8 parts.
The 2021 Nissan Frontier was sold with 3 engines. 12 parts fit every engine; the other 20 are engine-specific. Each part shows which engine(s) it fits.
14 brands supply electrical parts for the 2021 Nissan Frontier, led by STANDARD MOTOR PRODUCTS (5 parts), FVP (4 parts) and TECHPRO (4 parts), plus 11 more brands. Quality grades include Remanufactured, AGM and New.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2021 Nissan Frontier. 4 parts have it, including DEKA 9A47 (Battery) and STANDARD MOTOR PRODUCTS PPS151 (Parking Aid Sensor). Each part number opens a page with every vehicle that part fits.
Alternator / Generator
New
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TYC Fits: 2.5L L4 | 211119 | 🇲🇽 MX | 110 Amps | View on Amazon |
| WAI GLOBAL Fits: 3.8L V6 | 21970N | 🇺🇸 US | 185 Amps | View on Amazon |
Remanufactured
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP Fits: 2.5L L4 | 10442 | 🇲🇽 MX | Remanufactured | View on Amazon |
| FVP Fits: 3.8L V6 | 11092 | 🇺🇸 US | Remanufactured | View on Amazon |
| PURE ENERGY Fits: 2.5L L4 | 10442 | 🇲🇽 MX | Remanufactured | View on Amazon |
| PURE ENERGY Fits: 3.8L V6 | 11092 | 🇺🇸 US | Remanufactured | View on Amazon |
| REMY Fits: 3.8L V6 | 11541 | 🇺🇸 US | Remanufactured | View on Amazon |
| TERREPOWER Fits: 3.8L V6 | 42321 | 🇺🇸 US | Remanufactured | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TYC Fits: 2.5L L4 DIESEL Turbocharged | 211119 | 🇲🇽 MX | LE Model110 Amps | View on Amazon |
This table covers the alternators that charge the battery and run the electrical load. Typical signs include dim lights at idle, a battery lamp, or a growl from the charging pulley. Load-test the battery and inspect the belt and grounds — a bad ground mimics a failed alternator.
9 Alternator / Generator parts for the 2021 Nissan Frontier come from 6 brands — TYC, FVP, PURE ENERGY and 3 other brands.
The New section lists 2 options from TYC and WAI GLOBAL — brand-new units rather than rebuilt ones. TYC 211119 is listed in this group.
The Remanufactured section lists 6 options from FVP, PURE ENERGY, REMY and 1 other brand — factory-rebuilt units with new wear components. FVP 10442 is listed in this group.
1 further part sits outside the graded sections, with the same engine-level match.
Part numbers include TYC 211119, WAI GLOBAL 21970N and FVP 10442, among others listed above.
Battery
AGM (Extended Life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DEKA Popular Fits: 3.8L V6 | 9A47 | 🇺🇸 US | IntimidatorAGM | View on Amazon |
| FVP Popular Fits: 3.8L V6 | P47AGM | 🇺🇸 US | Platinum AGMBCI Group: 47 | View on Amazon |
| EXIDE Fits: 3.8L V6 | MXH5L247 | 🇺🇸 US | Marathon MaxBCI Group 47 (H5) | View on Amazon |
| LUCAS Fits: 3.8L V6 | LBAGM001A | 🇺🇸 US | BCI Group: 47AGM | View on Amazon |
| P1MAX Fits: 3.8L V6 | PMAGMH547 | 🇺🇸 US | BCI Group 47 AGM680 CCA | View on Amazon |
Performance AGM (Extended Life + Increased Power)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FULLRIVER Fits: 3.8L V6 | FT61047 | 🇺🇸 US | BCI Group 47(Length X Width X Height) 9.49 In x 6.89 In x 7.48 In | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DEKA Fits: 2.5L L4, 2.5L L4 DIESEL Turbocharged | 9A47 | 🇲🇽 MX | IntimidatorAGM | View on Amazon |
This table covers the batteries listed by group size and specification. Typical signs include slow cranking, a battery lamp, or a no-start after the vehicle sat overnight. Confirm group size and terminal layout in the notes. Clean the posts and the ground before condemning the battery.
7 Battery parts are listed for the 2021 Nissan Frontier, from DEKA, FVP, EXIDE and 3 other brands. DEKA 9A47 carries the "Popular" badge.
The AGM (Extended Life) section lists 5 options from DEKA, FVP, EXIDE and 2 other brands — grouped under the catalog's "AGM (Extended Life)" designation — the notes column spells out what sets them apart. DEKA 9A47 is listed in this group.
The Performance AGM (Extended Life + Increased Power) section lists 1 option from FULLRIVER — grouped under the catalog's "Performance AGM (Extended Life + Increased Power)" designation — the notes column spells out what sets them apart. FULLRIVER FT61047 is listed in this group.
1 ungrouped part is not assigned to a grade, with the same engine-level match.
Listed part numbers: DEKA 9A47, FVP P47AGM and EXIDE MXH5L247, plus the other parts above.
Battery Terminal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: all 2021 Frontier engines | 926498 | 🇺🇸 US 🇲🇽 MX | Positive Terminal | View on Amazon |
This table covers the terminals and clamps that connect cables to the battery posts.
One part is listed for the 2021 Nissan Frontier — DORMAN 926498.
Fuse Block
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: all 2021 Frontier engines | 926002 | 🇺🇸 US 🇲🇽 MX | Battery Fuse | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2021 Frontier engines | FH45 | 🇺🇸 US 🇲🇽 MX | View on Amazon |
This table covers the fuse blocks that hold this vehicle's fuses.
2 Fuse Block parts for the 2021 Nissan Frontier come from 2 brands — DORMAN and STANDARD MOTOR PRODUCTS. Every part fits all 3 engine options (2.5L L4, 2.5L L4 DIESEL Turbocharged and 3.8L V6).
Part numbers include DORMAN 926002 and STANDARD MOTOR PRODUCTS FH45.
Keyless Entry Remote
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: all 2021 Frontier engines | 99637ST | 🇺🇸 US 🇲🇽 MX | Body code D403 Button | View on Amazon |
This table covers the key fobs that lock, unlock and start the vehicle.
This group shows a single part: DORMAN 99637ST.
Parking Aid Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular Fits: all 2021 Frontier engines | PPS151 | 🇺🇸 US 🇲🇽 MX | Rear OuterRight Side | View on Amazon |
| STANDARD MOTOR PRODUCTS Popular Fits: all 2021 Frontier engines | PPS148 | 🇺🇸 US 🇲🇽 MX | Rear InnerLeft Side | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2021 Frontier engines | PPS149 | 🇺🇸 US 🇲🇽 MX | Rear InnerRight Side | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2021 Frontier engines | PPS150 | 🇺🇸 US 🇲🇽 MX | Rear OuterLeft Side | View on Amazon |
| TECHPRO Fits: all 2021 Frontier engines | NI1178100 | 🇺🇸 US 🇲🇽 MX | Rear LeftInner | View on Amazon |
| TECHPRO Fits: all 2021 Frontier engines | NI1178101 | 🇺🇸 US 🇲🇽 MX | Rear LeftOuter | View on Amazon |
| TECHPRO Fits: all 2021 Frontier engines | NI1179100 | 🇺🇸 US 🇲🇽 MX | Rear RightInner | View on Amazon |
| TECHPRO Fits: all 2021 Frontier engines | NI1179101 | 🇺🇸 US 🇲🇽 MX | Rear RightOuter | View on Amazon |
This table covers the ultrasonic park-aid sensors in the bumper. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors.
8 Parking Aid Sensor parts for the 2021 Nissan Frontier come from 2 brands — STANDARD MOTOR PRODUCTS and TECHPRO. The "Popular" part is STANDARD MOTOR PRODUCTS PPS151. Every part fits all 3 engine options (2.5L L4, 2.5L L4 DIESEL Turbocharged and 3.8L V6).
Part numbers include STANDARD MOTOR PRODUCTS PPS151, STANDARD MOTOR PRODUCTS PPS148 and STANDARD MOTOR PRODUCTS PPS149, among others listed above.
Starter Motor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP Fits: 3.8L V6 | 12949 | 🇺🇸 US | Remanufactured | View on Amazon |
| PURE ENERGY Fits: 3.8L V6 | 12949 | 🇺🇸 US | Remanufactured | View on Amazon |
| REMY Fits: 3.8L V6 | 16656 | 🇺🇸 US | Remanufactured | View on Amazon |
| TERREPOWER Fits: 3.8L V6 | 52231 | 🇺🇸 US | Remanufactured | View on Amazon |
This table covers the starter motors that crank the engine. Typical signs include no motion, a squeal, or a motor that only runs on one speed. Confirm power, ground and the control module before replacing the motor.
4 Starter Motor parts for the 2021 Nissan Frontier come from 4 brands — FVP, PURE ENERGY, REMY and 1 other brand.
Listed part numbers: FVP 12949 and REMY 16656, plus the other parts above.
Buying Electrical Parts for a 2021 Nissan Frontier
On this vehicle, the electrical system covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors.
- Match the engine first. Some electrical 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, clean or renew the battery terminals and grounds with any charging-system repair.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Alternator / Generator and Parking Aid Sensor .
Frequently Asked Questions
How many electrical parts fit the 2021 Nissan Frontier?
Our catalog currently lists 32 electrical parts for the 2021 Nissan Frontier across 7 subcategories and 14 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 electrical parts differ between 2021 Nissan Frontier engines?
Some do. 12 parts fit every engine; the other 20 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 electrical problems on a 2021 Nissan Frontier?
Common symptoms include slow cranking on cold mornings, a battery light that flickers, dim lights at idle, or a check-engine code pointing at a sensor circuit. 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, clean or renew the battery terminals and grounds with any charging-system repair.
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 test before replacing — a failed alternator and a bad ground can look identical, and sensors are frequently condemned for wiring faults. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2021 Nissan Frontier
Electrical Parts for Other Nissan Frontier Years
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