2021 Nissan Altima Electrical Parts

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. Read more

10 Alternator / Generator parts are listed for the 2021 Nissan Altima, from TYC, FVP, PURE ENERGY and 4 other brands. TYC 211893 carries the "Popular" badge.

In the New grade, TYC, ACKOJA and WAI GLOBAL supply 4 parts: brand-new units rather than rebuilt ones. A representative part number is TYC 211893.

In the Remanufactured grade, FVP, PURE ENERGY, REMY and 1 other brand supply 6 parts: factory-rebuilt units with new wear components. A representative part number is FVP 11589.

This table covers the pulleys on the alternator shaft. Typical signs include a growl or chirp that follows engine speed, or a pulley that will not spin freely by hand. Spin each pulley with the belt off. Roughness or play means replace it with the belt. Read more

2 Alternator / Generator Pulley parts for the 2021 Nissan Altima come from 2 brands — CONTINENTAL and LITENS.

Part numbers include CONTINENTAL 48708 and LITENS 920125A.

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. Read more

6 Battery parts for the 2021 Nissan Altima come from 6 brands — DEKA, FVP, EXIDE and 3 other brands. The "Popular" part is DEKA 9A47. Every part fits both the 2.0L L4 Turbocharged and the 2.5L L4.

In the AGM (Extended Life) grade, DEKA, FVP, EXIDE and 2 other brands supply 5 parts: grouped under the catalog's "AGM (Extended Life)" designation — the notes column spells out what sets them apart. A representative part number is DEKA 9A47.

In the Performance AGM (Extended Life + Increased Power) grade, FULLRIVER supplies 1 part: grouped under the catalog's "Performance AGM (Extended Life + Increased Power)" designation — the notes column spells out what sets them apart. A representative part number is FULLRIVER FT61047.

Listed part numbers: DEKA 9A47, FVP P47AGM and EXIDE MXH5L247, plus the other parts above.

This table covers the terminals and clamps that connect cables to the battery posts. Read more

4 Battery Terminal parts for the 2021 Nissan Altima come from 2 brands — BECK/ARNLEY and DORMAN. Every part fits both the 2.0L L4 Turbocharged and the 2.5L L4.

This group includes BECK/ARNLEY 2060001, BECK/ARNLEY 2060002 and DORMAN 926515 and the remaining parts above.

This table covers the key fobs that lock, unlock and start the vehicle. Read more

One part is listed for the 2021 Nissan Altima — DORMAN 99630ST.

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. Read more

2 Parking Aid Sensor parts are listed for the 2021 Nissan Altima, from DORMAN and TECHPRO. All of them fit every engine offered in the 2021 Altima.

Listed part numbers: DORMAN 684122 and TECHPRO NI1175106.

This table covers the brackets that mount the Parking Aid Sensor. Typical signs include a cracked mount, a rattle, or a bracket that no longer holds alignment. Confirm position in the notes. Many brackets look alike and bolt to different corners. Read more

3 Parking Aid Sensor Bracket parts are listed for the 2021 Nissan Altima, from TECHPRO and VARIOUS MFR. All of them fit every engine offered in the 2021 Altima.

Listed part numbers: TECHPRO NI1074103 and TECHPRO NI1176100, plus the other parts above.

This table covers the speed sensors on the transmission, transfer case or ABS ring. Typical signs include a dead speedometer, harsh transmission shifts, or a code for vehicle speed. Inspect the tone wheel and the connector before replacing the sensor. Read more

11 Speed Sensor parts for the 2021 Nissan Altima come from 8 brands — SKP, STANDARD MOTOR PRODUCTS, DELPHI and 5 other brands. The "Popular" part is HOLSTEIN 2VSS0056. 10 parts fit every engine; the other 1 is engine-specific.

The Economy section lists 6 options from SKP, HOLSTEIN, AUTOTECNICA and 2 other brands — the catalog's value-priced group. HOLSTEIN 2VSS0056 is listed in this group.

In the Standard Replacement grade, DELPHI, NTK, STANDARD MOTOR PRODUCTS and 1 other brand supply 5 parts: built to original-equipment specification. A representative part number is DELPHI SS11426.

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. Read more

12 Starter Motor parts are listed for the 2021 Nissan Altima, from TYC, PURE ENERGY, REMY and 5 other brands. TYC 134032 carries the "Popular" badge.

New: 4 parts, from TYC, SKP and WAI GLOBAL. A representative part number is TYC 134032.

Remanufactured: 8 parts, from PURE ENERGY, REMY, TERREPOWER and 2 other brands. A representative part number is PURE ENERGY 18303.