2021 Toyota Tundra 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

31 Alternator / Generator parts are listed for the 2021 Toyota Tundra, from REMY, TERREPOWER, WAI GLOBAL and 8 other brands. SKP SK11352 carries the "Popular" badge. Grades run from New through Remanufactured; Remanufactured is the most populated section, led by FVP, PURE ENERGY, REMY and 6 other brands.

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

9 Battery parts for the 2021 Toyota Tundra come from 6 brands — DEKA, FULLRIVER, BOSCH and 3 other brands. The "Popular" part is DEKA 9A3585.

Part numbers include DEKA 9A3585, DEKA 9A34R and BOSCH S6523B, among others listed above.

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

5 Battery Terminal parts for the 2021 Toyota Tundra come from 4 brands — BECK/ARNLEY, STANDARD MOTOR PRODUCTS, AUTOTECNICA and 1 other brand. The "Popular" part is STANDARD MOTOR PRODUCTS BP100P.

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

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

One part is listed for the 2021 Toyota Tundra — DORMAN 99682ST.

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

5 Parking Aid Sensor parts are listed for the 2021 Toyota Tundra, from STANDARD MOTOR PRODUCTS, AUTOTECNICA, MARELLI and 1 other brand. STANDARD MOTOR PRODUCTS PPS65 carries the "Popular" badge.

Part numbers include STANDARD MOTOR PRODUCTS PPS65, AUTOTECNICA TY1320987 and MARELLI SDP207, among others listed 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

4 Speed Sensor parts for the 2021 Toyota Tundra come from 3 brands — STANDARD MOTOR PRODUCTS, HOLSTEIN and DELPHI.

The Economy section lists 2 options from HOLSTEIN and STANDARD MOTOR PRODUCTS — the catalog's value-priced group. HOLSTEIN 2VSS0737 is listed in this group.

In the Standard Replacement grade, DELPHI and STANDARD MOTOR PRODUCTS supply 2 parts: built to original-equipment specification. A representative part number is DELPHI SS12412.

This group includes HOLSTEIN 2VSS0737, STANDARD MOTOR PRODUCTS SC570T and DELPHI SS12412 and the remaining parts 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

10 Starter Motor parts are listed for the 2021 Toyota Tundra, from TYC, SKP, WAI GLOBAL and 7 other brands. TYC 119209 carries the "Popular" badge.

In the New grade, TYC, SKP and WAI GLOBAL supply 3 parts: brand-new units rather than rebuilt ones. A representative part number is TYC 119209.

In the Remanufactured grade, DENSO, ACDELCO, BOSCH and 4 other brands supply 7 parts: factory-rebuilt units with new wear components. A representative part number is DENSO 2801019.