This page lists 25 drivetrain parts for the 2015 Kia Optima, across 4 part types, covering all 3 engine options (2.0L L4 Turbocharged, 2.4L L4 and 2.4L L4 ELECTRIC/GAS). Every part shows its brand, manufacturer part number and fitment notes.
On the 2015 Kia Optima, the drivetrain system moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware. Most of the listed parts are CV Axle (21 parts), CV Joint Boot (2 parts) and CV Joint (1 part). The other 1 part type covers the remaining 1 part.
The 2015 Kia Optima was sold with 3 engines. 1 part fits every engine; the other 24 are engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2015 Kia Optima drivetrain parts are GSP (6 parts), TRAKMOTIVE (6 parts) and TOP NOTCH (5 parts), plus 7 more brands. Quality grades include Standard Replacement and Economy.
6 parts on this 2015 Kia Optima page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including TOP NOTCH TN60038 (CV Axle) and TOP NOTCH TN60039 (CV Axle). Click any part number to see every vehicle that part fits.
CV Axle
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AUTO EXTRA Fits: 2.4L L4 ELECTRIC/GAS | HY88707A | 🇺🇸 US 🇨🇦 CA | Front RightOE# 495014R250 | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TOP NOTCH Popular Fits: 2.4L L4 ELECTRIC/GAS | TN60038 | 🇺🇸 US 🇨🇦 CA | Front Left | View on Amazon |
| TOP NOTCH Popular Fits: 2.4L L4 ELECTRIC/GAS | TN60039 | 🇺🇸 US 🇨🇦 CA | Front Right | View on Amazon |
| CARDONE Fits: 2.4L L4 ELECTRIC/GAS | 663827 | 🇺🇸 US 🇨🇦 CA | Front Right | View on Amazon |
| GSP Fits: 2.4L L4 ELECTRIC/GAS | NCV37069 | 🇺🇸 US 🇨🇦 CA | Front Left | View on Amazon |
| GSP Fits: 2.4L L4 ELECTRIC/GAS | NCV37070 | 🇺🇸 US 🇨🇦 CA | Front Right | View on Amazon |
| TRAKMOTIVE Fits: 2.4L L4 ELECTRIC/GAS | HY8226 | 🇺🇸 US 🇨🇦 CA | Front LeftVIN D | View on Amazon |
| TRAKMOTIVE Fits: 2.4L L4 ELECTRIC/GAS | HY8233 | 🇺🇸 US 🇨🇦 CA | Front RightVIN D | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| APWI Popular Fits: 2.0L L4 Turbocharged | HY8423A | 🇺🇸 US 🇨🇦 CA | Front Right | View on Amazon |
| APWI Popular Fits: 2.4L L4 | KA8029A | 🇺🇸 US 🇨🇦 CA | Front Right | View on Amazon |
| TOP NOTCH Popular Fits: 2.0L L4 Turbocharged | TN60219 | 🇺🇸 US 🇨🇦 CA | Front Left | View on Amazon |
| TOP NOTCH Popular Fits: 2.4L L4 | TN60216 | 🇺🇸 US 🇨🇦 CA | Front LeftEX Model or LX Model or SX Model | View on Amazon |
| GSP Fits: 2.0L L4 Turbocharged | NCV37093 | 🇺🇸 US 🇨🇦 CA | Front Left | View on Amazon |
| GSP Fits: 2.0L L4 Turbocharged | NCV37092 | 🇺🇸 US 🇨🇦 CA | Front Right | View on Amazon |
| GSP Fits: 2.4L L4 | NCV37078 | 🇺🇸 US 🇨🇦 CA | Front LeftEX Model or LX Model or SX Model, VIN K | View on Amazon |
| GSP Fits: 2.4L L4 | NCV75090 | 🇺🇸 US 🇨🇦 CA | Front Right, VIN K | View on Amazon |
| TOP NOTCH Fits: 2.0L L4 Turbocharged | TN60218 | 🇺🇸 US 🇨🇦 CA | Front Right | View on Amazon |
| TRAKMOTIVE Fits: 2.0L L4 Turbocharged | KA8123 | 🇺🇸 US 🇨🇦 CA | AAR Joint Design | View on Amazon |
| TRAKMOTIVE Fits: 2.0L L4 Turbocharged | HY8242 | 🇺🇸 US 🇨🇦 CA | Front RightVIN 6 (8th digit) | View on Amazon |
| TRAKMOTIVE Fits: 2.4L L4 | KA8096 | 🇺🇸 US 🇨🇦 CA | Front LeftVIN 7 (8th Digit) | View on Amazon |
| TRAKMOTIVE Fits: 2.4L L4 | KA8111 | 🇺🇸 US | Front Right | View on Amazon |
This table covers the complete CV axle shafts from differential (or hub) to wheel. Typical signs include a click in tight turns, grease flung around the wheel well, or a vibration that builds with speed. A torn boot caught early is a boot kit; caught late it is the whole axle. Torque the axle nut to the method in the notes.
21 CV Axle parts for the 2015 Kia Optima come from 6 brands — GSP, TRAKMOTIVE, TOP NOTCH and 3 other brands. The "Popular" part is TOP NOTCH TN60038.
The Economy section lists 1 option from AUTO EXTRA — the catalog's value-priced group. AUTO EXTRA HY88707A is listed in this group.
In the Standard Replacement grade, TOP NOTCH, GSP, TRAKMOTIVE and 1 other brand supply 7 parts: built to original-equipment specification. A representative part number is TOP NOTCH TN60038.
13 further parts sit outside the graded sections, with the same engine-level match.
CV Joint
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACKOJA Fits: 2.4L L4 | A539916 | 🇺🇸 US 🇨🇦 CA | Fits Front Right Inner | View on Amazon |
This table covers the constant-velocity joints at each end of a drive axle.
This group shows a single part: ACKOJA A539916.
CV Joint Boot
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BECK/ARNLEY Fits: all 2015 Optima engines | 1032489 | 🇺🇸 US 🇨🇦 CA | Front Inner | View on Amazon |
| MEVOTECH Fits: 2.0L L4 Turbocharged | DX773 | 🇺🇸 US 🇨🇦 CA | Front Inner | View on Amazon |
This table covers the boots that keep grease in a CV joint. Typical signs include a split boot, grease flung around the joint, or a click once grit is inside. A boot caught early is a kit. Once the joint has clicked, the joint itself is usually worn.
2 CV Joint Boot parts for the 2015 Kia Optima come from 2 brands — BECK/ARNLEY and MEVOTECH. 1 part fits every engine; the other 1 is engine-specific.
Listed part numbers: BECK/ARNLEY 1032489 and MEVOTECH DX773.
Gear Oil
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| IDEMITSU Fits: 2.4L L4, 2.4L L4 ELECTRIC/GAS | 30305024750 | 🇺🇸 US | 75W90 Racing Gear Oil1 Quart | View on Amazon |
This table covers the gear oils specified for the axle or transfer case. Typical signs include a low-oil lamp, knocking, or oil that has gone thin before the next interval. Match the viscosity and spec in the notes, not just the weight on the bottle.
This group shows a single part: IDEMITSU 30305024750.
Buying Drivetrain Parts for a 2015 Kia Optima
On this vehicle, the drivetrain system moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware.
- Match the engine first. Some drivetrain 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 differential or transfer-case fluid with any axle or seal job while everything is already open.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: CV Axle and CV Joint Boot .
Frequently Asked Questions
How many drivetrain parts fit the 2015 Kia Optima?
Our catalog currently lists 25 drivetrain parts for the 2015 Kia Optima across 4 subcategories and 10 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 drivetrain parts differ between 2015 Kia Optima engines?
Some do. 1 part fits every engine; the other 24 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 drivetrain problems on a 2015 Kia Optima?
Common symptoms include clicking in tight turns, a clunk when shifting between drive and reverse, vibration that builds with speed, or gear oil on the inside of a wheel. 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 differential or transfer-case fluid with any axle or seal job while everything is already open.
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 2015 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 2015 Kia Optima?
First match the engine — each row shows which engine(s) the part fits. Then a torn CV boot caught early is a cheap boot kit; caught late it is a whole axle — inspect before deciding which to buy. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2015 Kia Optima
Drivetrain Parts for Other Kia Optima Years
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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.