2018 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

29 Alternator / Generator parts are listed for the 2018 Toyota Corolla, from TERREPOWER, REMY, WAI GLOBAL and 8 other brands. SKP SK3343029 carries the "Popular" badge. They are grouped as New and Remanufactured, with Remanufactured the largest group at 20 parts from REMY, TERREPOWER, FVP and 4 other brands.

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

4 Alternator / Generator Pulley parts for the 2018 Toyota Corolla come from 4 brands — CONTINENTAL, DORMAN, LITENS and 1 other brand.

Part numbers include CONTINENTAL 49963, DORMAN 300434 and LITENS 920055A, among others listed above.

This table covers the Automatic Headlamp 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

2 Automatic Headlamp Sensor parts for the 2018 Toyota Corolla come from 2 brands — AUTOTECNICA and WELLS.

This group includes AUTOTECNICA TY1321529 and WELLS 5S8091.

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

5 Battery parts for the 2018 Toyota Corolla come from 5 brands — P1MAX, ACDELCO, BOSCH and 2 other brands. The "Popular" part is P1MAX PMAGM35.

In the AGM (Extended Life) grade, P1MAX, ACDELCO, BOSCH and 1 other brand supply 4 parts: grouped under the catalog's "AGM (Extended Life)" designation — the notes column spells out what sets them apart. A representative part number is P1MAX PMAGM35.

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 FT75035.

This group includes P1MAX PMAGM35, ACDELCO 35AGM and BOSCH S6523B and the remaining parts above.

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 2018 Toyota Corolla — STANDARD MOTOR PRODUCTS BSC118.

This table covers the clamps and brackets that secure the battery. Read more

One part is listed for the 2018 Toyota Corolla — VARIOUS MFR TO2996103.

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

6 Battery Terminal parts for the 2018 Toyota Corolla come from 4 brands — BECK/ARNLEY, DORMAN, STANDARD MOTOR PRODUCTS and 1 other brand. The "Popular" part is BECK/ARNLEY 2060001.

This group includes BECK/ARNLEY 2060001, STANDARD MOTOR PRODUCTS BP100P and AUTOTECNICA TY1318200 and the remaining parts 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

2 Cruise Control Distance Sensor parts for the 2018 Toyota Corolla come from 2 brands — STANDARD MOTOR PRODUCTS and WELLS.

Part numbers include STANDARD MOTOR PRODUCTS CCD10 and WELLS 5S17123.

This table covers the engine-control modules that run fuel, spark and emissions. Read more

BSE supplies the 4 Engine Control Module (ECM Computer) parts for the 2018 Toyota Corolla.

Listed part numbers: BSE ECC23144M, BSE ECC23146M and BSE EM23144, plus the other parts above.

This table covers the replacement fuses for this vehicle's fuse boxes. Typical signs include one circuit dead while its neighbor still works, or a fuse that blows again as soon as you replace it. Match amperage and fuse type. A repeat blow means a short — find it before the next fuse. Read more

13 Fuse parts for the 2018 Toyota Corolla come from BUSSMANN. The "Popular" part is BUSSMANN FMX30LP.

In the 10 Amp grade, BUSSMANN supplies 1 part: grouped under the catalog's "10 Amp" designation — the notes column spells out what sets them apart. A representative part number is BUSSMANN ATM10LP.

In the 120 Amp grade, BUSSMANN supplies 1 part: grouped under the catalog's "120 Amp" designation — the notes column spells out what sets them apart. A representative part number is BUSSMANN FLM120.

In the 140 Amp grade, BUSSMANN supplies 1 part: grouped under the catalog's "140 Amp" designation — the notes column spells out what sets them apart. A representative part number is BUSSMANN FLM140.

The 15 Amp section lists 1 option from BUSSMANN — grouped under the catalog's "15 Amp" designation — the notes column spells out what sets them apart. BUSSMANN ATM15LP is listed in this group.

The 20 Amp section lists 1 option from BUSSMANN — grouped under the catalog's "20 Amp" designation — the notes column spells out what sets them apart. BUSSMANN ATM20LP is listed in this group.

In the 25 Amp grade, BUSSMANN supplies 1 part: grouped under the catalog's "25 Amp" designation — the notes column spells out what sets them apart. A representative part number is BUSSMANN ATM25LP.

In the 30 Amp grade, BUSSMANN supplies 2 parts: grouped under the catalog's "30 Amp" designation — the notes column spells out what sets them apart. A representative part number is BUSSMANN FMX30LP.

The 40 Amp section lists 1 option from BUSSMANN — grouped under the catalog's "40 Amp" designation — the notes column spells out what sets them apart. BUSSMANN FMX40LP is listed in this group.

In the 5 Amp grade, BUSSMANN supplies 1 part: grouped under the catalog's "5 Amp" designation — the notes column spells out what sets them apart. A representative part number is BUSSMANN ATM5LP.

In the 50 Amp grade, BUSSMANN supplies 1 part: grouped under the catalog's "50 Amp" designation — the notes column spells out what sets them apart. A representative part number is BUSSMANN FMX50LP.

The 7.5 Amp section lists 1 option from BUSSMANN — grouped under the catalog's "7.5 Amp" designation — the notes column spells out what sets them apart. BUSSMANN ATM712LP is listed in this group.

The 80 Amp section lists 1 option from BUSSMANN — grouped under the catalog's "80 Amp" designation — the notes column spells out what sets them apart. BUSSMANN FLM80 is listed in this group.

This table covers the horns mounted in the front of the vehicle. Read more

10 Horn parts for the 2018 Toyota Corolla come from FIAMM. The "Popular" part is FIAMM 72112.

The Accessory Replacement section lists 5 options from FIAMM — grouped under the catalog's "Accessory Replacement" designation — the notes column spells out what sets them apart. FIAMM 72112 is listed in this group.

In the Standard Replacement grade, FIAMM supplies 5 parts: built to original-equipment specification. A representative part number is FIAMM 7250522.

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

One part is listed for the 2018 Toyota Corolla — DORMAN 99684ST.

This table covers the replacement shells for the key fob. Read more

One part is listed for the 2018 Toyota Corolla — DORMAN 92071.

This table covers the Lane Departure Camera modules. Typical signs include a cluster of unrelated faults, a no-communication code, or a module that will not sleep. Confirm power, ground and programming compatibility in the notes. Modules are rarely plug-and-play across years. Read more

2 Lane Departure Camera / Module parts are listed for the 2018 Toyota Corolla, from DORMAN and WELLS.

Part numbers include DORMAN 601988 and WELLS 8A1012.

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

One part is listed for the 2018 Toyota Corolla — VALEO 890000.

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

10 Speed Sensor parts for the 2018 Toyota Corolla come from 6 brands — BECK/ARNLEY, HOLSTEIN, DELPHI and 3 other brands. The "Popular" part is ULTRA-POWER SC658.

The Economy section lists 5 options from BECK/ARNLEY, HOLSTEIN and ULTRA-POWER — the catalog's value-priced group. ULTRA-POWER SC658 is listed in this group.

Standard Replacement: 5 parts, from DELPHI, AISIN and STANDARD MOTOR PRODUCTS. A representative part number is DELPHI SS12255.

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

9 Starter Motor parts are listed for the 2018 Toyota Corolla, from BOSCH, WAI GLOBAL, ACDELCO and 5 other brands. ACDELCO 3362271A carries the "Popular" badge.

In the New grade, BOSCH and WAI GLOBAL supply 2 parts: brand-new units rather than rebuilt ones. A representative part number is BOSCH SR3316N.

In the Remanufactured grade, ACDELCO, PURE ENERGY, BOSCH and 4 other brands supply 7 parts: factory-rebuilt units with new wear components. A representative part number is ACDELCO 3362271A.

Listed part numbers: ACDELCO 3362271A, BOSCH SR3316N and WAI GLOBAL 30481N, plus the other parts above.