2021 Toyota Highlander 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

6 Alternator / Generator parts are listed for the 2021 Toyota Highlander, from TYC, PURE ENERGY, BOSCH and 3 other brands. TYC 221248 carries the "Popular" badge.

In the New grade, TYC supplies 1 part: brand-new units rather than rebuilt ones. A representative part number is TYC 221248.

In the Remanufactured grade, PURE ENERGY, BOSCH, FVP and 2 other brands supply 5 parts: factory-rebuilt units with new wear components. A representative part number is PURE ENERGY 11889.

Listed part numbers: TYC 221248, PURE ENERGY 11889 and BOSCH AL3403X, plus the other parts above.

This table covers the rectifier diode packs in the alternator. Read more

One part is listed for the 2021 Toyota Highlander — BOSCH 1986AE0621.

This table covers the bearings in the alternator housing. Typical signs include a growl that rises with speed, or play in the shaft or hub. Set preload the way the notes specify. A dry or crushed bearing fails quickly. Read more

This group shows a single part: BOSCH 1986AE0628.

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 Toyota Highlander come from 2 brands — CONTINENTAL and LITENS.

Part numbers include CONTINENTAL 49972 and LITENS 920068A.

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 Highlander come from 7 brands — DEKA, LUCAS, EXIDE and 4 other brands. The "Popular" part is DEKA 9A47. 1 part fits every engine; the other 11 are engine-specific.

In the AGM (Extended Life) grade, DEKA, LUCAS, EXIDE and 3 other brands supply 10 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 2 parts: 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.

This table covers the Battery Current 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

One part is listed for the 2021 Toyota Highlander — STANDARD MOTOR PRODUCTS BSC119.

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

3 Battery Terminal parts for the 2021 Toyota Highlander come from 3 brands — BECK/ARNLEY, DORMAN and STANDARD MOTOR PRODUCTS. Every part fits both the 2.5L L4 ELECTRIC/GAS and the 3.5L V6.

Listed part numbers: BECK/ARNLEY 2060001, DORMAN 926515 and STANDARD MOTOR PRODUCTS BP100P.

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 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

3 Parking Aid Sensor parts are listed for the 2021 Toyota Highlander, from STANDARD MOTOR PRODUCTS and TECHPRO. All of them fit every engine offered in the 2021 Highlander.

Listed part numbers: STANDARD MOTOR PRODUCTS PPS310, STANDARD MOTOR PRODUCTS PPS302 and TECHPRO TO1075110.

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

2 Speed Sensor parts for the 2021 Toyota Highlander come from STANDARD MOTOR PRODUCTS.

Listed part numbers: STANDARD MOTOR PRODUCTS SC816 and STANDARD MOTOR PRODUCTS SC758.

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 Toyota Highlander, from WAI GLOBAL, PURE ENERGY, REMY and 5 other brands. TYC 116366 carries the "Popular" badge.

New: 4 parts, from WAI GLOBAL, TYC and ULTRA-POWER. A representative part number is TYC 116366.

Remanufactured: 8 parts, from PURE ENERGY, REMY, TERREPOWER and 2 other brands. A representative part number is PURE ENERGY 16366.