92 Ignition parts are listed for the 2019 Kia Optima, in 5 part types, covering all 4 engine options (1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged and 2.4L L4). Each one has a brand, a manufacturer part number and notes that say where it fits.
The ignition system on the 2019 Kia Optima delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules. The largest groups are Ignition Coil (31 parts), Camshaft Position Sensor (21 parts) and Crankshaft Position Sensor (20 parts). The other 2 part types cover the remaining 20 parts.
The 2019 Kia Optima was sold with 4 engines. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
25 brands supply ignition parts for the 2019 Kia Optima, led by STANDARD MOTOR PRODUCTS (10 parts), WALKER PRODUCTS (8 parts) and NGK (8 parts), plus 22 more brands. Quality grades include Standard Replacement, Economy and Iridium.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2019 Kia Optima. 18 parts have it, including SKP SKPC960 (Camshaft Position Sensor) and ASTEMO / HITACHI CPS0057 (Crankshaft Position Sensor). Each part number opens a page with every vehicle that part fits.
Camshaft Position Sensor
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SKP Popular Fits: 1.6L L4 Turbocharged | SKPC960 | 🇺🇸 US | View on Amazon | |
| AUTOTECNICA Fits: 1.6L L4 Turbocharged | HY1417615 | 🇺🇸 US | View on Amazon | |
| HOLSTEIN Fits: 1.6L L4 Turbocharged | 2CAM0362 | 🇺🇸 US | View on Amazon | |
| HOLSTEIN Fits: 2.0L L4 Turbocharged, 2.4L L4 | 2CAM0589 | 🇺🇸 US 🇨🇦 CA | Fits or From 06/01/2018 | View on Amazon |
| PRENCO Fits: 1.6L L4 Turbocharged | 4E1234 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| VEMO Fits: 2.0L L4 Turbocharged, 2.4L L4 | V52720279 | 🇺🇸 US 🇨🇦 CA | LX Model or S Model | View on Amazon |
Full Service Kit
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WALKER PRODUCTS Fits: 1.6L L4 Turbocharged | 23591577 | 🇺🇸 US | Full Service Kit | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ASTEMO / HITACHI Popular Fits: 1.6L L4 Turbocharged | CPS0034 | 🇺🇸 US | View on Amazon | |
| STANDARD MOTOR PRODUCTS Popular Fits: 1.6L L4 Turbocharged | PC960 | 🇺🇸 US | View on Amazon | |
| STANDARD MOTOR PRODUCTS Popular Fits: 2.0L L4 Turbocharged, 2.4L L4 | PC1045 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| WALKER PRODUCTS Popular Fits: 2.0L L4 Turbocharged, 2.4L L4 | 2352089 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Sensor Only | View on Amazon |
| ASTEMO / HITACHI Fits: 2.0L L4 Turbocharged, 2.4L L4 | CPS0028 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| BECK/ARNLEY Fits: 1.6L L4 Turbocharged | 1800732 | 🇺🇸 US | View on Amazon | |
| DELPHI Fits: 1.6L L4 Turbocharged | SS11216 | 🇺🇸 US | View on Amazon | |
| DELPHI Fits: 2.0L L4 Turbocharged, 2.4L L4 | SS12158 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| HELLA Fits: 1.6L L4 Turbocharged | 009168071 | 🇺🇸 US | 3-Pin Connectorwith Seal Ring | View on Amazon |
| HL MANDO Fits: 2.0L L4 Turbocharged, 2.4L L4 | 22A1242 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | New | View on Amazon |
| NTK Fits: 2.0L L4 Turbocharged, 2.4L L4 | EC0273 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| WALKER PRODUCTS Fits: 1.6L L4 Turbocharged | 2351577 | 🇺🇸 US | Sensor OnlyConnector Shape: Oblong | View on Amazon |
| WELLS Fits: 1.6L L4 Turbocharged | 5S12755 | 🇺🇸 US | View on Amazon | |
| WELLS Fits: 2.0L L4 Turbocharged, 2.4L L4 | 5S15134 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the sensors that report camshaft position to the ECU. Typical signs include a stall, a no-start, or a code for cam or crank correlation. Check the connector and the reluctor gap before replacing the sensor.
21 Camshaft Position Sensor parts for the 2019 Kia Optima come from 14 brands — WALKER PRODUCTS, HOLSTEIN, ASTEMO / HITACHI and 11 other brands. The "Popular" part is SKP SKPC960.
The Economy section lists 6 options from HOLSTEIN, SKP, AUTOTECNICA and 2 other brands — the catalog's value-priced group. SKP SKPC960 is listed in this group.
The Full Service Kit section lists 1 option from WALKER PRODUCTS — grouped under the catalog's "Full Service Kit" designation — the notes column spells out what sets them apart. WALKER PRODUCTS 23591577 is listed in this group.
In the Standard Replacement grade, ASTEMO / HITACHI, STANDARD MOTOR PRODUCTS, WALKER PRODUCTS and 6 other brands supply 14 parts: built to original-equipment specification. A representative part number is ASTEMO / HITACHI CPS0034.
Crankshaft Position Sensor
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FAMOUS BRAND Fits: 1.6L L4 Turbocharged | CSC1873 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| HOLSTEIN Fits: 1.6L L4 Turbocharged | 2CRK0348 | 🇺🇸 US | View on Amazon | |
| HOLSTEIN Fits: 2.0L L4 Turbocharged, 2.4L L4 | 2CRK0742 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| PRENCO Fits: 1.6L L4 Turbocharged | 4D1388 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| PRENCO Fits: 2.0L L4 Turbocharged, 2.4L L4 | 4D1389 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| SKP Fits: 1.6L L4 Turbocharged | SKPC1021 | 🇺🇸 US | 2 Terminals | View on Amazon |
| SPECTRA PREMIUM Fits: 2.0L L4 Turbocharged, 2.4L L4 | S10573 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ASTEMO / HITACHI Popular Fits: 1.6L L4 Turbocharged | CPS0057 | 🇺🇸 US | View on Amazon | |
| ASTEMO / HITACHI Popular Fits: 2.0L L4 Turbocharged, 2.4L L4 | CPS0030 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits or LX Model | View on Amazon |
| HL MANDO Popular Fits: 1.6L L4 Turbocharged | 22A1246 | 🇺🇸 US | New | View on Amazon |
| HL MANDO Popular Fits: 2.0L L4 Turbocharged, 2.4L L4 | 22A1247 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | New | View on Amazon |
| STANDARD MOTOR PRODUCTS Popular Fits: 1.6L L4 Turbocharged | PC1021 | 🇺🇸 US | View on Amazon | |
| BECK/ARNLEY Fits: 2.0L L4 Turbocharged, 2.4L L4 | 1800793 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| DELPHI Fits: 1.6L L4 Turbocharged | SS12450 | 🇺🇸 US | View on Amazon | |
| DELPHI Fits: 2.0L L4 Turbocharged, 2.4L L4 | SS12168 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| HYUNDAI Fits: 1.6L L4 Turbocharged | 391802B030 | 🇺🇸 US | View on Amazon | |
| NTK Fits: 1.6L L4 Turbocharged | EH0091 | 🇺🇸 US | View on Amazon | |
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 Turbocharged, 2.4L L4 | PC1043 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| WALKER PRODUCTS Fits: 1.6L L4 Turbocharged | 2351709 | 🇺🇸 US | Sensor Only | View on Amazon |
| WALKER PRODUCTS Fits: 2.0L L4 Turbocharged, 2.4L L4 | 2352094 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Sensor Only | View on Amazon |
This table covers the sensors that report crankshaft position and engine speed. Typical signs include a stall, a no-start, or a code for cam or crank correlation. Check the connector and the reluctor gap before replacing the sensor.
20 Crankshaft Position Sensor parts for the 2019 Kia Optima come from 13 brands — HOLSTEIN, PRENCO, ASTEMO / HITACHI and 10 other brands. The "Popular" part is ASTEMO / HITACHI CPS0057.
The Economy section: 7 options from HOLSTEIN, PRENCO, FAMOUS BRAND and 2 other brands. FAMOUS BRAND CSC1873 is listed in this group.
Standard Replacement: 13 parts, from ASTEMO / HITACHI, HL MANDO, STANDARD MOTOR PRODUCTS and 5 other brands. A representative part number is ASTEMO / HITACHI CPS0057.
Ignition Coil
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AUTOTECNICA Popular Fits: 1.6L L4 Turbocharged | HY1319600 | 🇺🇸 US | View on Amazon | |
| SKP Popular Fits: 1.6L L4 Turbocharged | SKUF817 | 🇺🇸 US | View on Amazon | |
| B&B Fits: 2.4L L4 | BB2764 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| HOLSTEIN Fits: 2.0L L4 Turbocharged, 2.4L L4 | 2IGC0553 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| SKP Fits: 2.0L L4 Turbocharged, 2.4L L4 | SKUF764 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| SPECTRA PREMIUM Fits: 1.6L L4 Turbocharged | C938 | 🇺🇸 US | View on Amazon | |
| SPECTRA PREMIUM Fits: 2.0L L4 Turbocharged, 2.4L L4 | C988 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ASTEMO / HITACHI Popular Fits: 2.0L L4 Turbocharged, 2.4L L4 | IGC0217 | 🇺🇸 US 🇨🇦 CA | Coil on Plug | View on Amazon |
| DELPHI Popular Fits: 2.0L L4 Turbocharged, 2.4L L4 | GN10730 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| ASTEMO / HITACHI Fits: 1.6L L4 Turbocharged | IGC0577 | 🇺🇸 US | View on Amazon | |
| DELPHI Fits: 1.6L L4 Turbocharged | GN10910 | 🇺🇸 US | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DENSO Popular Fits: 1.6L L4 Turbocharged | 6738206 | 🇺🇸 US | Direct Ignition Coil or Coil On Plug | View on Amazon |
| UNITED MOTOR PRODUCTS Popular Fits: 2.0L L4 Turbocharged, 2.4L L4 | COP657 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Terminal Quantity: 4 | View on Amazon |
| ACKOJA Fits: 1.6L L4 Turbocharged | A52700049 | 🇺🇸 US | 4 Pinswith OE No. 273012B120 | View on Amazon |
| BECK/ARNLEY Fits: 1.6L L4 Turbocharged | 1788580 | 🇺🇸 US | View on Amazon | |
| BECK/ARNLEY Fits: 2.0L L4 Turbocharged, 2.4L L4 | 1788545 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| DENSO Fits: 2.0L L4 Turbocharged, 2.4L L4 | 6738210 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Direct Ignition Coil or Coil On Plug | View on Amazon |
| HL MANDO Fits: 1.6L L4 Turbocharged | 21A0129 | 🇺🇸 US | New | View on Amazon |
| HL MANDO Fits: 2.0L L4 Turbocharged, 2.4L L4 | 21A0128 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | New | View on Amazon |
| HYUNDAI Fits: 1.6L L4 Turbocharged | 273012B120 | 🇺🇸 US | View on Amazon | |
| HYUNDAI Fits: 2.0L L4 Turbocharged | 273002GGA0 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| NGK Fits: 1.6L L4 Turbocharged | 49138 | 🇺🇸 US | View on Amazon | |
| NGK Fits: 2.0L L4 Turbocharged | 49137 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| STANDARD MOTOR PRODUCTS Fits: 1.6L L4 Turbocharged | UF817 | 🇺🇸 US | View on Amazon | |
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 Turbocharged, 2.4L L4 | UF764 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Mounting Hardware Included: No | View on Amazon |
| WALKER PRODUCTS Fits: 1.6L L4 Turbocharged | 9212330 | 🇺🇸 US | Single Coil | View on Amazon |
| WALKER PRODUCTS Fits: 2.0L L4 Turbocharged, 2.4L L4 | 9212303 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Single Coil | View on Amazon |
| WALKER PRODUCTS Fits: 2.0L L4 Turbocharged, 2.4L L4 | 92841184 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Coil Set | View on Amazon |
| WELLS Fits: 1.6L L4 Turbocharged | 5C2129 | 🇺🇸 US | View on Amazon | |
| WELLS Fits: 2.0L L4 Turbocharged | 5C2128 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HOLSTEIN Fits: 1.6L L4 Turbocharged | 2IGC0587 | 🇺🇸 US | View on Amazon |
This table covers the coils that fire each spark plug. Typical signs include a misfire that follows one cylinder, a snap in damp weather, or a coil that is swollen or cracked. Swap a suspect coil with a neighbor to confirm, then replace boots that tore on the way off.
31 Ignition Coil parts for the 2019 Kia Optima come from 17 brands — WALKER PRODUCTS, SKP, HOLSTEIN and 14 other brands. The "Popular" part is AUTOTECNICA HY1319600. Grades run from Economy through Standard Replacement; Standard Replacement is the most populated section, led by WALKER PRODUCTS, DENSO, BECK/ARNLEY and 7 other brands.
Spark Plug
Summary: Notes include pre-set gaps of 0.027", 0.031", 0.032", 0.033", 0.035", 0.036", 0.04" and 0.044". Replacement brands in this table include NGK, BOSCH and CHAMPION.
Copper / Nickel
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CHAMPION Fits: 2.4L L4 | 445 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Copper PlusPre-Set Gap: 0.033" | View on Amazon |
Iridium (lasts up to 4x longer than Copper / Nickel)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NGK Popular Fits: 2.4L L4 | 93175 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Iridium IXReach: 26.5 mm | View on Amazon |
| BOSCH Fits: 2.4L L4 | 96321 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | OE Fine Wire Double IridiumPre-Set Gap: 0.044" | View on Amazon |
| CHAMPION Fits: 2.4L L4 | 9047 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IridiumPre-Set Gap: 0.04" | View on Amazon |
| DENSO Fits: 2.4L L4 | 5356 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Iridium PowerPre-Set Gap: 0.035" | View on Amazon |
| DENSO Fits: 2.4L L4 | 3461 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Iridium Long LifePre-Set Gap: 0.044" | View on Amazon |
| NGK Fits: 2.4L L4 | 92315 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Laser Iridium High IgnitabilityPre-Set Gap: 0.044" | View on Amazon |
| SKP Fits: 2.4L L4 | SP1032 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Iridium XP | View on Amazon |
Ruthenium (maximum durability & ignitability)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NGK Popular Fits: 2.4L L4 | 96358 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Ruthenium HX High IgnitabilityHex Size: 5/8" (16mm) | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BOSCH Fits: 1.6L L4 Turbocharged | YR6NI332S | 🇺🇸 US | OE Fine Wire IridiumPre-Set Gap: 0.027" | View on Amazon |
| BOSCH Fits: 1.6L L4 Turbocharged | 8515 | 🇺🇸 US | EVO | View on Amazon |
| HYUNDAI Fits: 1.6L L4 Turbocharged | 1884908080 | 🇺🇸 US | View on Amazon | |
| KIA Fits: 2.4L L4 | 1884911070 | 🇺🇸 US | View on Amazon | |
| NGK Fits: 1.6L L4 Turbocharged | 97080 | 🇺🇸 US | Laser Iridium High IgnitabilityPre-Set Gap: 0.031" | View on Amazon |
| NGK Fits: 2.0L L4 Turbocharged | 95448 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Laser Iridium High Ignitability | View on Amazon |
| NGK Fits: 2.0L L4 Turbocharged | SILZKR8H9G | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Laser Iridium High Ignitability | View on Amazon |
This table covers the spark plugs for this engine. Typical signs include misfire under load, rough idle, or a flashing check-engine light. Verify the gap even on pre-gapped plugs, and replace coil boots that come off a high-mileage engine.
16 Spark Plug parts are listed for the 2019 Kia Optima, from NGK, BOSCH, CHAMPION and 4 other brands. NGK 93175 carries the "Popular" badge.
In the Copper / Nickel grade, CHAMPION supplies 1 part: grouped under the catalog's "Copper / Nickel" designation — the notes column spells out what sets them apart. A representative part number is CHAMPION 445.
The Iridium (lasts up to 4x longer than Copper / Nickel) section lists 7 options from NGK, DENSO, BOSCH and 2 other brands — grouped under the catalog's "Iridium (lasts up to 4x longer than Copper / Nickel)" designation — the notes column spells out what sets them apart. NGK 93175 is listed in this group.
In the Ruthenium (maximum durability & ignitability) grade, NGK supplies 1 part: grouped under the catalog's "Ruthenium (maximum durability & ignitability)" designation — the notes column spells out what sets them apart. A representative part number is NGK 96358.
7 ungrouped parts are not assigned to a grade, with the same engine-level match.
Spark Plug / Ignition Coil Boot
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 1.6L L4 Turbocharged | 34221 | 🇺🇸 US | OE Style | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 1.6L L4 Turbocharged | SPP231E | 🇺🇸 US | OE Style | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 Turbocharged, 2.4L L4 | SPP232E | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | OE Style | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 2.0L L4 Turbocharged, 2.4L L4 | 34231 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | OE Style | View on Amazon |
This table covers the silicone and rubber boots that insulate the coil-to-plug spark path. Typical signs include a misfire in the rain, carbon tracking on the boot, or a snap when you pop the coil off. Replace boots as a set on a high-mileage engine; one cracked boot will take the coil with it.
4 Spark Plug / Ignition Coil Boot parts for the 2019 Kia Optima come from STANDARD MOTOR PRODUCTS.
Listed part numbers: STANDARD MOTOR PRODUCTS 34221, STANDARD MOTOR PRODUCTS SPP231E and STANDARD MOTOR PRODUCTS SPP232E, plus the other parts above.
Buying Ignition Parts for a 2019 Kia Optima
On this vehicle, the ignition system delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules.
- Match the engine first. Every ignition part here is engine-specific; each row shows which engine(s) it fits.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace plugs and wires (or coil boots) as a set — one weak cylinder makes the whole set feel bad.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Ignition Coil and Camshaft Position Sensor .
Frequently Asked Questions
How many ignition parts fit the 2019 Kia Optima?
Our catalog currently lists 92 ignition parts for the 2019 Kia Optima across 5 subcategories and 25 brands, covering all 4 engine options (1.6L L4 Turbocharged, 2.0L L4 ELECTRIC/GAS, 2.0L L4 Turbocharged and 2.4L L4). Each part is matched to the engine(s) it fits.
Do ignition parts differ between 2019 Kia Optima engines?
Yes. Every ignition part on this page is engine-specific. Each row shows which engine(s) it fits — use the filter at the top to hide the rest. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of ignition problems on a 2019 Kia Optima?
Common symptoms include misfires under load, rough idle, flashing check-engine light, or poor starting in damp weather. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What spark-plug gap is listed for the 2019 Kia Optima?
Notes on this page include pre-set gaps of 0.027", 0.031", 0.032", 0.033", 0.035", 0.036", 0.04" and 0.044". Still verify against spec — even “pre-gapped” plugs should be checked before they go in.
What should I replace at the same time?
Where labor overlaps, replace plugs and wires (or coil boots) as a set — one weak cylinder makes the whole set feel bad.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2019 Kia Optima was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2019 Kia Optima?
First match the engine — each row shows which engine(s) the part fits. Then gap matters even on “pre-gapped” plugs — verify against spec, and replace coil boots when they come off a high-mileage engine. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2019 Kia Optima
Ignition Parts for Other Kia Optima Years
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