77 Belt drive parts are listed for the 2012 Kia Optima, in 5 part types, covering all 3 engine options (2.0L L4 Turbocharged, 2.4L L4 and 2.4L L4 ELECTRIC/GAS). Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 2012 Kia Optima, the belt drive system spins the accessories — serpentine and V-belts, tensioners, idlers and pulleys. 72 parts of the 77 listed are Belt Tensioner (28 parts), Belt (22 parts) and Idler Pulley (22 parts). The other 2 part types cover the remaining 5 parts.
The 2012 Kia Optima was sold with 3 engines. 7 parts fit every engine; the other 70 are engine-specific. Each part shows which engine(s) it fits.
17 brands supply belt drive parts for the 2012 Kia Optima, led by DAYCO (18 parts), GATES (12 parts) and CONTINENTAL (9 parts), plus 14 more brands. Quality grades include Standard Replacement, Economy and Kit.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2012 Kia Optima. 18 parts have it, including DAYCO 5060840DR (Belt) and CONTINENTAL 49428 (Belt Tensioner). Each part number opens a page with every vehicle that part fits.
Belt
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DAYCO Popular Fits: 2.4L L4 | 5060840DR | 🇺🇸 US 🇨🇦 CA | Drive Rite®Serpentine | View on Amazon |
| GATES Popular Fits: 2.0L L4 Turbocharged | K060837 | 🇺🇸 US 🇨🇦 CA | Micro-V | View on Amazon |
| DAYCO Fits: 2.0L L4 Turbocharged | 5060835DR | 🇺🇸 US 🇨🇦 CA | Drive Rite®Serpentine | View on Amazon |
| FVP Fits: 2.0L L4 Turbocharged, 2.4L L4 | 835K6 | 🇺🇸 US 🇨🇦 CA | Multi V-BeltSerpentine | View on Amazon |
| GATES Fits: 2.4L L4 | K060840 | 🇺🇸 US 🇨🇦 CA | Micro-V | View on Amazon |
| ROADMAX Fits: 2.0L L4 Turbocharged | 6K837AP | 🇺🇸 US 🇨🇦 CA | V-RibbedSerpentine | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Popular Fits: 2.0L L4 Turbocharged | 6K837 | 🇺🇸 US 🇨🇦 CA | Professional / GoldSerpentine | View on Amazon |
| DAYCO Popular Fits: 2.4L L4 | 5060840 | 🇺🇸 US 🇨🇦 CA | Serpentine | View on Amazon |
| ACDELCO Fits: 2.4L L4 | 6K840 | 🇺🇸 US 🇨🇦 CA | Professional / GoldSerpentine | View on Amazon |
| BANDO Fits: 2.0L L4 Turbocharged | 6PK2125 | 🇺🇸 US 🇨🇦 CA | Rib Quantity: 6Inch Number: 837K6 | View on Amazon |
| BANDO Fits: 2.4L L4 | 6PK2130 | 🇺🇸 US 🇨🇦 CA | Rib Quantity: 6Inch Number: 840K6 | View on Amazon |
| CONTINENTAL Fits: 2.0L L4 Turbocharged, 2.4L L4 | 4060837 | 🇺🇸 US 🇨🇦 CA | Multi V-BeltSerpentine | View on Amazon |
| CONTINENTAL Fits: 2.0L L4 Turbocharged | 6PK2125 | 🇺🇸 US 🇨🇦 CA | Metric LineSerpentine | View on Amazon |
| DAYCO Fits: 2.0L L4 Turbocharged | 5060835 | 🇺🇸 US 🇨🇦 CA | Serpentine | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BANDO Popular Fits: 2.4L L4 ELECTRIC/GAS | 7PK970 | 🇺🇸 US 🇨🇦 CA | Rib Quantity: 7 | View on Amazon |
| CONTINENTAL Popular Fits: 2.4L L4 ELECTRIC/GAS | 4070381F | 🇺🇸 US 🇨🇦 CA | Multi V-Belt Reinforced BeltSerpentine | View on Amazon |
| CONTINENTAL Fits: 2.4L L4 ELECTRIC/GAS | 4030310S | 🇺🇸 US 🇨🇦 CA | Multi V-Belt Stretch Belt | View on Amazon |
| DAYCO Fits: 2.4L L4 ELECTRIC/GAS | 3PK784EE | 🇺🇸 US 🇨🇦 CA | ELA® Stretch BeltSerpentine | View on Amazon |
| DAYCO Fits: 2.4L L4 ELECTRIC/GAS | A070382 | 🇺🇸 US 🇨🇦 CA | Serpentine | View on Amazon |
| GATES Fits: 2.4L L4 ELECTRIC/GAS | K070381EMD | 🇺🇸 US 🇨🇦 CA | E-Start Micro-V | View on Amazon |
| GATES Fits: 2.4L L4 ELECTRIC/GAS | K030308SF | 🇺🇸 US 🇨🇦 CA | Premium OE Stretch Fit Micro-V BeltRequires Installation Tool | View on Amazon |
| GATES Fits: 2.4L L4 ELECTRIC/GAS | K070381EST | 🇺🇸 US 🇨🇦 CA | E-Start Micro-V | View on Amazon |
This table covers the serpentine and accessory belts that drive the front accessories. Typical signs include squeal on cold start, cracks across the ribs, or glazing on the back of the belt. A new belt on a worn tensioner will squeal within weeks — spin the idlers by hand while the belt is off.
22 Belt parts for the 2012 Kia Optima come from 7 brands — DAYCO, GATES, CONTINENTAL and 4 other brands. The "Popular" part is DAYCO 5060840DR.
The Economy section lists 6 options from DAYCO, GATES, FVP and 1 other brand — the catalog's value-priced group. DAYCO 5060840DR is listed in this group.
In the Standard Replacement grade, ACDELCO, DAYCO, BANDO and 1 other brand supply 8 parts: built to original-equipment specification. A representative part number is ACDELCO 6K837.
8 further parts sit outside the graded sections, with the same engine-level match.
Belt Removal / Installation Tool
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DAYCO Fits: 2.4L L4 ELECTRIC/GAS | 93875 | 🇺🇸 US 🇨🇦 CA | For Water Pump Belt | View on Amazon |
This table covers the Belt Removal / Installation tools. This is a service tool, not a wear part — match the application in the notes.
One part is listed for the 2012 Kia Optima — DAYCO 93875.
Belt Tensioner
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CLOYES Fits: all 2012 Optima engines | B20040 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| DORMAN Fits: 2.0L L4 Turbocharged, 2.4L L4 | 419327 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| SKP Fits: 2.0L L4 Turbocharged, 2.4L L4 | SK89618 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
Kit
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Fits: 2.4L L4 | ACK060840 | 🇺🇸 US 🇨🇦 CA | Professional / GoldKit | View on Amazon |
| CLOYES Fits: 2.4L L4 | B40041 | 🇺🇸 US 🇨🇦 CA | Kit | View on Amazon |
| CONTINENTAL Fits: 2.0L L4 Turbocharged, 2.4L L4 | K49428B | 🇺🇸 US 🇨🇦 CA | Includes Poly-V, Tensioner Assembly and Tensioner PulleyKit | View on Amazon |
| DAYCO Fits: 2.0L L4 Turbocharged | 5060835K1 | 🇺🇸 US 🇨🇦 CA | KitIncludes: Serpentine Belt, 2 Pulleys, and Tensioner | View on Amazon |
| DAYCO Fits: 2.0L L4 Turbocharged | KIT431BCK | 🇺🇸 US 🇨🇦 CA | Kit | View on Amazon |
| DAYCO Fits: 2.4L L4 | 5060840K3 | 🇺🇸 US 🇨🇦 CA | KitIncludes: Serpentine Belt, 2 Pulleys, and Tensioner | View on Amazon |
| DAYCO Fits: 2.4L L4 | KIT438BCK | 🇺🇸 US 🇨🇦 CA | Kit | View on Amazon |
| GATES Fits: 2.0L L4 Turbocharged | 90K39071B | 🇺🇸 US 🇨🇦 CA | KitIncludes: Belt, Tensioner, 2 Idlers | View on Amazon |
| GATES Fits: 2.4L L4 | 90K39071 | 🇺🇸 US 🇨🇦 CA | KitIncludes: Belt, Tensioner, 2 Idlers | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CONTINENTAL Popular Fits: 2.0L L4 Turbocharged, 2.4L L4 | 49428 | 🇺🇸 US 🇨🇦 CA | Multi-V or Smooth Pulley | View on Amazon |
| DAYCO Popular Fits: 2.0L L4 Turbocharged, 2.4L L4 | 89618 | 🇺🇸 US 🇨🇦 CA | Pulley 1 Diameter: 65 mm | View on Amazon |
| GATES Popular Fits: 2.0L L4 Turbocharged, 2.4L L4 | 39071 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| GATES Popular Fits: 2.4L L4 ELECTRIC/GAS | 38780 | 🇺🇸 US 🇨🇦 CA | Alternator - Left Side | View on Amazon |
| LITENS Popular Fits: 2.0L L4 Turbocharged, 2.4L L4 | 999220A | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| LITENS Popular Fits: 2.4L L4 ELECTRIC/GAS | 999693A | 🇺🇸 US 🇨🇦 CA | OuterOE# 25281-2G663 (Clockwise arrow On part) | View on Amazon |
| ACDELCO Fits: 2.0L L4 Turbocharged, 2.4L L4 | 39071 | 🇺🇸 US 🇨🇦 CA | Professional / Gold | View on Amazon |
| ACKOJA Fits: 2.0L L4 Turbocharged, 2.4L L4 | A520226 | 🇺🇸 US 🇨🇦 CA | with OE No. 2528125000 | View on Amazon |
| ACKOJA Fits: 2.0L L4 Turbocharged, 2.4L L4 | A529704 | 🇺🇸 US 🇨🇦 CA | with OE No. 252822G000 | View on Amazon |
| DAYCO Fits: 2.4L L4 ELECTRIC/GAS | 89745 | 🇺🇸 US 🇨🇦 CA | Right | View on Amazon |
| DAYCO Fits: 2.4L L4 ELECTRIC/GAS | 89746 | 🇺🇸 US 🇨🇦 CA | Left | View on Amazon |
| GATES Fits: 2.4L L4 ELECTRIC/GAS | 38781 | 🇺🇸 US 🇨🇦 CA | Alternator Side | View on Amazon |
| HYUNDAI Fits: all 2012 Optima engines | 2528125000 | 🇺🇸 US 🇨🇦 CA | To 09/22/2014 | View on Amazon |
| HYUNDAI Fits: 2.4L L4, 2.4L L4 ELECTRIC/GAS | 252812G663 | 🇺🇸 US 🇨🇦 CA | Outer | View on Amazon |
| INA Fits: 2.0L L4 Turbocharged, 2.4L L4 | FT40430 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| LITENS Fits: 2.4L L4 ELECTRIC/GAS | 999692A | 🇺🇸 US 🇨🇦 CA | InnerOE# 25281-2G652 / 25281-2G653 (Counterclockwise arrow On part) | View on Amazon |
This table covers the automatic tensioners that hold belt tension. Typical signs include belt flutter, a chirp that returns after a new belt, or a damper that no longer holds the arm. Replace the tensioner with the belt at higher mileage; the labor overlaps almost entirely.
28 Belt Tensioner parts are listed for the 2012 Kia Optima, from DAYCO, GATES, LITENS and 8 other brands. CONTINENTAL 49428 carries the "Popular" badge. Grades run from Economy through Standard Replacement; Standard Replacement is the most populated section, led by DAYCO, GATES, LITENS and 5 other brands.
Idler Pulley
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Popular Fits: all 2012 Optima engines | 419699 | 🇺🇸 US 🇨🇦 CA | Smooth | View on Amazon |
| SKP Popular Fits: 2.0L L4 Turbocharged, 2.4L L4 | SK89133 | 🇺🇸 US 🇨🇦 CA | Smooth | View on Amazon |
| SKP Popular Fits: all 2012 Optima engines | SK36307 | 🇺🇸 US 🇨🇦 CA | Smooth | View on Amazon |
| SKP Fits: 2.0L L4 Turbocharged, 2.4L L4 | SK36443 | 🇺🇸 US 🇨🇦 CA | Grooved | View on Amazon |
| ÜRO PARTS Fits: 2.0L L4 Turbocharged, 2.4L L4 | 11287549557 | 🇺🇸 US 🇨🇦 CA | Lower | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DAYCO Popular Fits: 2.0L L4 Turbocharged, 2.4L L4 | 89133 | 🇺🇸 US 🇨🇦 CA | Smooth | View on Amazon |
| GATES Popular Fits: 2.0L L4 Turbocharged, 2.4L L4 | 36307 | 🇺🇸 US 🇨🇦 CA | Smooth | View on Amazon |
| LITENS Popular Fits: 2.4L L4, 2.0L L4 Turbocharged | 900540A | 🇺🇸 US 🇨🇦 CA | Grooved | View on Amazon |
| ACDELCO Fits: 2.0L L4 Turbocharged, 2.4L L4 | 36443 | 🇺🇸 US 🇨🇦 CA | Professional / GoldGrooved | View on Amazon |
| ACDELCO Fits: 2.0L L4 Turbocharged, 2.4L L4 | 36307 | 🇺🇸 US 🇨🇦 CA | GoldSmooth | View on Amazon |
| CONTINENTAL Fits: 2.0L L4 Turbocharged, 2.4L L4 | 49193 | 🇺🇸 US 🇨🇦 CA | SmoothIncludes Hardware | View on Amazon |
| CONTINENTAL Fits: 2.0L L4 Turbocharged, 2.4L L4 | 50016 | 🇺🇸 US 🇨🇦 CA | GroovedGrooved, Includes Hardware | View on Amazon |
| DAYCO Fits: 2.0L L4 Turbocharged, 2.4L L4 | 89095 | 🇺🇸 US 🇨🇦 CA | Grooved | View on Amazon |
| DAYCO Fits: 2.0L L4 Turbocharged, 2.4L L4 | 89577 | 🇺🇸 US 🇨🇦 CA | Grooved | View on Amazon |
| FOUR SEASONS Fits: 2.4L L4, 2.4L L4 ELECTRIC/GAS | 45025 | 🇺🇸 US 🇨🇦 CA | Smooth | View on Amazon |
| GATES Fits: 2.0L L4 Turbocharged, 2.4L L4 | 36443 | 🇺🇸 US 🇨🇦 CA | GroovedFlanged | View on Amazon |
| HAYDEN Fits: 2.4L L4, 2.4L L4 ELECTRIC/GAS | 5025 | 🇺🇸 US 🇨🇦 CA | Smooth | View on Amazon |
| INA Fits: all 2012 Optima engines | FP06201 | 🇺🇸 US 🇨🇦 CA | Smooth | View on Amazon |
| INA Fits: all 2012 Optima engines | FP05561 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| LITENS Fits: 2.0L L4 Turbocharged, 2.4L L4 | 900903A | 🇺🇸 US 🇨🇦 CA | Smooth | View on Amazon |
| LITENS Fits: 2.4L L4 ELECTRIC/GAS | 900712A | 🇺🇸 US 🇨🇦 CA | Grooved | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACKOJA Fits: all 2012 Optima engines | A520220 | 🇺🇸 US 🇨🇦 CA | with Dual Automatic A/Cwith OE No. 2528725110 | View on Amazon |
This table covers the idler pulleys the belt wraps around. Typical signs include a chirp that follows engine speed, or a pulley that feels rough or has play. Replace a noisy idler with the belt — the labor is already paid for.
22 Idler Pulley parts for the 2012 Kia Optima come from 12 brands — SKP, DAYCO, LITENS and 9 other brands. The "Popular" part is DORMAN 419699. 5 parts fit every engine; the other 17 are engine-specific.
The Economy section: 5 options from SKP, DORMAN and ÜRO PARTS. DORMAN 419699 is listed in this group.
Standard Replacement: 16 parts, from DAYCO, LITENS, GATES and 5 other brands. A representative part number is DAYCO 89133.
1 further part sits outside the graded sections, with the same engine-level match.
Tensioner Pulley
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SKP Fits: 2.0L L4 Turbocharged, 2.4L L4 | SK89161 | 🇺🇸 US 🇨🇦 CA | Smooth | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CONTINENTAL Fits: 2.0L L4 Turbocharged, 2.4L L4 | 50113 | 🇺🇸 US 🇨🇦 CA | Smooth | View on Amazon |
| DAYCO Fits: 2.0L L4 Turbocharged, 2.4L L4 | 89161 | 🇺🇸 US 🇨🇦 CA | Smooth | View on Amazon |
| LITENS Fits: 2.0L L4 Turbocharged, 2.4L L4 | 900713A | 🇺🇸 US 🇨🇦 CA | Smooth | View on Amazon |
This table covers the pulleys on the tensioner arm. 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.
4 Tensioner Pulley parts are listed for the 2012 Kia Optima, from SKP, CONTINENTAL, DAYCO and 1 other brand.
Economy: 1 part, from SKP. A representative part number is SKP SK89161.
The Standard Replacement section: 3 options from CONTINENTAL, DAYCO and LITENS. CONTINENTAL 50113 is listed in this group.
Part numbers include SKP SK89161, CONTINENTAL 50113 and DAYCO 89161, among others listed above.
Buying Belt Drive Parts for a 2012 Kia Optima
On this vehicle, the belt drive system spins the accessories — serpentine and V-belts, tensioners, idlers and pulleys.
- Match the engine first. Some belt drive parts fit every engine; others are 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 the tensioner and idler pulleys with any belt at higher mileage — the labor overlaps almost entirely.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Belt Tensioner and Belt .
Frequently Asked Questions
How many belt drive parts fit the 2012 Kia Optima?
Our catalog currently lists 77 belt drive parts for the 2012 Kia Optima across 5 subcategories and 17 brands, covering all 3 engine options (2.0L L4 Turbocharged, 2.4L L4 and 2.4L L4 ELECTRIC/GAS). Each part is matched to the engine(s) it fits.
Do belt drive parts differ between 2012 Kia Optima engines?
Some do. 7 parts fit every engine; the other 70 are engine-specific. Each row (and the filter at the top) shows which. 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 belt drive problems on a 2012 Kia Optima?
Common symptoms include squealing on cold start, a belt that shows cracking or glazing, or an accessory that slows under load. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, replace the tensioner and idler pulleys with any belt at higher mileage — the labor overlaps almost entirely.
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 2012 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 2012 Kia Optima?
First match the engine — each row shows which engine(s) the part fits. Then a new belt on a worn tensioner will squeal within weeks — check tensioner damping and idler bearings while the belt is off. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2012 Kia Optima
Belt Drive Parts for Other Kia Optima Years
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