2018 Kia Optima 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

22 Alternator / Generator parts for the 2018 Kia Optima come from 11 brands — BOSCH, TERREPOWER, SKP and 8 other brands. The "Popular" part is HL MANDO 11A1672.

The New section lists 11 options from SKP, BOSCH, TYC and 5 other brands — brand-new units rather than rebuilt ones. HL MANDO 11A1672 is listed in this group.

The Remanufactured section lists 10 options from PURE ENERGY, BOSCH, FVP and 3 other brands — factory-rebuilt units with new wear components. PURE ENERGY 10275 is listed in this group.

1 further part sits outside the graded sections, 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

2 Alternator / Generator Pulley parts are listed for the 2018 Kia Optima, from CONTINENTAL and LITENS.

Listed part numbers: CONTINENTAL 49969 and LITENS 920057A.

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

16 Battery parts are listed for the 2018 Kia Optima, from ACDELCO, DEKA, FVP and 5 other brands. DEKA 9A94R carries the "Popular" badge.

The AGM (Extended Life) section lists 8 options from ACDELCO, DEKA, FVP and 4 other brands — grouped under the catalog's "AGM (Extended Life)" designation — the notes column spells out what sets them apart. DEKA 9A94R is listed in this group.

The Performance AGM (Extended Life + Increased Power) section lists 1 option from FULLRIVER — grouped under the catalog's "Performance AGM (Extended Life + Increased Power)" designation — the notes column spells out what sets them apart. FULLRIVER FT85094R is listed in this group.

7 ungrouped parts are not assigned to a grade, with the same engine-level match.

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

7 Fuse parts are listed for the 2018 Kia Optima, from BUSSMANN and DORMAN. BUSSMANN ATM20LP carries the "Popular" badge. 6 parts fit every engine; the other 1 is engine-specific.

The 10 Amp section lists 1 option from BUSSMANN — grouped under the catalog's "10 Amp" designation — the notes column spells out what sets them apart. BUSSMANN ATM10LP is listed in this group.

In the 15 Amp grade, BUSSMANN supplies 1 part: grouped under the catalog's "15 Amp" designation — the notes column spells out what sets them apart. A representative part number is BUSSMANN ATM15LP.

In the 150 Amp grade, DORMAN supplies 1 part: grouped under the catalog's "150 Amp" designation — the notes column spells out what sets them apart. A representative part number is DORMAN 926011.

In the 20 Amp grade, BUSSMANN supplies 1 part: grouped under the catalog's "20 Amp" designation — the notes column spells out what sets them apart. A representative part number is BUSSMANN ATM20LP.

The 25 Amp section lists 1 option from BUSSMANN — grouped under the catalog's "25 Amp" designation — the notes column spells out what sets them apart. BUSSMANN ATM25LP is listed in this group.

The 30 Amp section lists 1 option from BUSSMANN — grouped under the catalog's "30 Amp" designation — the notes column spells out what sets them apart. BUSSMANN ATM30LP is listed in this group.

In the 40 Amp grade, BUSSMANN supplies 1 part: grouped under the catalog's "40 Amp" designation — the notes column spells out what sets them apart. A representative part number is BUSSMANN FMX40LP.

Listed part numbers: BUSSMANN ATM20LP, BUSSMANN ATM10LP and BUSSMANN ATM15LP, plus the other parts 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

This group shows a single part: STANDARD MOTOR PRODUCTS PPS247.

This table covers the Rain 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 V52720254.

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

13 Speed Sensor parts are listed for the 2018 Kia Optima, from WELLS, DELPHI, STANDARD MOTOR PRODUCTS and 4 other brands. DELPHI SS12425 carries the "Popular" badge.

In the Economy grade, BECK/ARNLEY and HOLSTEIN supply 2 parts: the catalog's value-priced group. A representative part number is BECK/ARNLEY 0900026.

The Standard Replacement section lists 4 options from DELPHI, STANDARD MOTOR PRODUCTS, HYUNDAI and 1 other brand — built to original-equipment specification. DELPHI SS12425 is listed in this group.

7 ungrouped parts are not assigned to a grade, with the same engine-level match.

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

31 Starter Motor parts for the 2018 Kia Optima come from 11 brands — HL MANDO, WAI GLOBAL, TYC and 8 other brands. The "Popular" part is HL MANDO 12A1570. New and Remanufactured are all represented, and Remanufactured alone accounts for 16 parts.