2018 Toyota Sienna 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 2018 Toyota Sienna, 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.

This group includes TYC 221248, PURE ENERGY 11889 and BOSCH AL3403X and the remaining parts above.

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

One part is listed for the 2018 Toyota Sienna — 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

3 Alternator / Generator Pulley parts for the 2018 Toyota Sienna come from 3 brands — CONTINENTAL, DORMAN and LITENS.

Part numbers include CONTINENTAL 49972, DORMAN 300432 and LITENS 920068A.

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

This group shows a single part: AUTOTECNICA TY1321507.

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

7 Battery parts for the 2018 Toyota Sienna come from 5 brands — DEKA, BOSCH, EXIDE and 2 other brands. The "Popular" part is DEKA 9A3585.

Listed part numbers: DEKA 9A3585, DEKA 9A34R and BOSCH S6523B, plus the other parts above.

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

2 Battery Hold Down parts are listed for the 2018 Toyota Sienna, from SKP and VARIOUS MFR.

This group includes SKP SK7440403K and VARIOUS MFR TO2996101.

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

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

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

This table covers the Blind Spot Detection 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 Sienna — WELLS 5S16858.

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 Sienna come from 2 brands — DORMAN and WELLS.

This group includes DORMAN 601938 and WELLS 5S17181.

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

14 Fuse parts for the 2018 Toyota Sienna come from BUSSMANN. The "Popular" part is BUSSMANN ATM20LP.

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 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 FLD140.

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 3 parts: grouped under the catalog's "30 Amp" designation — the notes column spells out what sets them apart. A representative part number is BUSSMANN ATM30LP.

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.

The 60 Amp section lists 1 option from BUSSMANN — grouped under the catalog's "60 Amp" designation — the notes column spells out what sets them apart. BUSSMANN FLF60 is listed in this group.

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.

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

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

11 Horn parts for the 2018 Toyota Sienna come from FIAMM. The "Popular" part is FIAMM 7210223.

The Accessory Replacement section lists 6 options from FIAMM — grouped under the catalog's "Accessory Replacement" designation — the notes column spells out what sets them apart. FIAMM 7210223 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

DORMAN supplies both parts for the 2018 Toyota Sienna.

Part numbers include DORMAN 99136 and DORMAN 99143.

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

DORMAN supplies the 5 Keyless Entry Remote Case parts for the 2018 Toyota Sienna. DORMAN 13655 carries the "Popular" badge.

Part numbers include DORMAN 13655, DORMAN 13654 and DORMAN 13653, among others listed above.

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 Sienna — TECHPRO TO1075109.

This table covers the Side Object Sensor 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

One part is listed for the 2018 Toyota Sienna — DORMAN 601464.

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

This group shows a single part: 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

8 Starter Motor parts are listed for the 2018 Toyota Sienna, from TYC, ULTRA-POWER, WAI GLOBAL and 5 other brands. TYC 116366 carries the "Popular" badge.

New: 3 parts, from TYC, ULTRA-POWER and WAI GLOBAL. A representative part number is TYC 116366.

Remanufactured: 5 parts, from BOSCH, DENSO, PURE ENERGY and 2 other brands. A representative part number is BOSCH SR3319X.

Listed part numbers: TYC 116366 and ULTRA-POWER 16366N, plus the other parts above.

This table covers the Starter solenoids. Typical signs include a harsh or missing shift, or a code for this solenoid circuit. Check resistance and the connector before dropping the pan for a solenoid. Read more

One part is listed for the 2018 Toyota Sienna — WELLS 1M1617.