2021 Toyota Corolla 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

16 Alternator / Generator parts are listed for the 2021 Toyota Corolla, from PURE ENERGY, REMY, TERREPOWER and 4 other brands. TYC 221793 carries the "Popular" badge.

In the New grade, TYC and WAI GLOBAL supply 2 parts: brand-new units rather than rebuilt ones. A representative part number is TYC 221793.

In the Remanufactured grade, PURE ENERGY, REMY, TERREPOWER and 2 other brands supply 13 parts: factory-rebuilt units with new wear components. A representative part number is PURE ENERGY 14084.

1 ungrouped part is not assigned to a grade, with the same engine-level match.

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

7 Alternator / Generator Pulley parts for the 2021 Toyota Corolla come from 3 brands — LITENS, CONTINENTAL and ACKOJA. The "Popular" part is LITENS 920055A. 4 parts fit every engine; the other 3 are engine-specific.

Listed part numbers: LITENS 920055A, LITENS 920083A and ACKOJA A70230008, plus the other parts above.

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

12 Battery parts for the 2021 Toyota Corolla come from 8 brands — FVP, DEKA, MOTORCRAFT and 5 other brands. The "Popular" part is DEKA 9A47.

In the AGM (Extended Life) grade, FVP, DEKA, EXIDE and 3 other brands supply 7 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.

4 further parts sit outside the graded sections, with the same engine-level match.

This table covers the Battery Cooling fans. Typical signs include overheating at idle, a fan that never comes on, or a blade that hits the shroud. Confirm the fan command and the relay before replacing the assembly. Read more

This group shows a single part: GPD 2312075.

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

6 Battery Terminal parts for the 2021 Toyota Corolla come from 4 brands — BECK/ARNLEY, DORMAN, STANDARD MOTOR PRODUCTS and 1 other brand. The "Popular" part is BECK/ARNLEY 2060001. Every part fits all 3 engine options (1.8L L4, 1.8L L4 ELECTRIC/GAS and 2.0L L4).

Part numbers include BECK/ARNLEY 2060001, STANDARD MOTOR PRODUCTS BP100P and AUTOTECNICA TY1318200, among others listed above.

This table covers the Cruise Control Distance sensors. 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

This group shows a single part: VEMO V70720588.

This table covers the Hybrid Battery Voltage sensors. 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

This group shows a single part: STANDARD MOTOR PRODUCTS BSC35.

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

One part is listed for the 2021 Toyota Corolla — DORMAN 99710ST.

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

7 Speed Sensor parts for the 2021 Toyota Corolla come from 4 brands — BECK/ARNLEY, STANDARD MOTOR PRODUCTS, HOLSTEIN and 1 other brand. The "Popular" part is HOLSTEIN 2VSS0532.

The Economy section lists 4 options from BECK/ARNLEY and HOLSTEIN — the catalog's value-priced group. HOLSTEIN 2VSS0532 is listed in this group.

In the Standard Replacement grade, DELPHI supplies 1 part: built to original-equipment specification. A representative part number is DELPHI SS12408.

2 further parts sit outside the graded sections, with the same engine-level match.

Part numbers include HOLSTEIN 2VSS0532, BECK/ARNLEY 0900004 and BECK/ARNLEY 0900013, among others listed above.

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

18 Starter Motor parts are listed for the 2021 Toyota Corolla, from WAI GLOBAL, BOSCH, PURE ENERGY and 7 other brands. TYC 116373 carries the "Popular" badge.

New: 6 parts, from WAI GLOBAL, TYC, ULTRA-POWER and 1 other brand. A representative part number is TYC 116373.

Remanufactured: 11 parts, from PURE ENERGY, FVP, REMY and 4 other brands. A representative part number is PURE ENERGY 19573.

1 ungrouped part is not assigned to a grade, with the same engine-level match.