32 Drivetrain parts are listed for the 2008 Kia Optima, in 4 part types, covering both the 2.4L L4 and the 2.7L V6. Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 2008 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 (17 parts), Differential Carrier Bearing / Race (12 parts) and CV Joint Boot (2 parts). The other 1 part type covers the remaining 1 part.
The 2008 Kia Optima was sold with both the 2.4L L4 and the 2.7L V6. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2008 Kia Optima drivetrain parts are CARDONE (6 parts), TRAKMOTIVE (4 parts) and WJB / INMOTION PARTS (3 parts), plus 12 more brands. Quality grades include Standard Replacement and Economy.
7 parts on this 2008 Kia Optima page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including CARDONE 603585 (CV Axle) and WJB / INMOTION PARTS WTA35 (Differential Carrier Bearing / Race). Click any part number to see every vehicle that part fits.
CV Axle
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CARDONE Popular Fits: 2.4L L4 | 603585 | 🇺🇸 US | Remanufactured | View on Amazon |
| CARDONE Popular Fits: 2.4L L4 | 603586 | 🇺🇸 US | Remanufactured | View on Amazon |
| HERI Popular Fits: 2.4L L4 | 87380 | 🇺🇸 US | Front LeftAutomatic trans. | View on Amazon |
| CARDONE Fits: 2.4L L4 | 603584 | 🇺🇸 US | Remanufactured | View on Amazon |
| CARDONE Fits: 2.4L L4 | 603589 | 🇺🇸 US | Remanufactured | View on Amazon |
| FAMOUS BRAND Fits: 2.4L L4 | NCV547946 | 🇺🇸 US 🇨🇦 CA | Front Left | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| APWI Popular Fits: 2.4L L4 | KA8017A | 🇺🇸 US | Front LeftAutomatic trans. | View on Amazon |
| CARDONE Fits: 2.4L L4 | 663593 | 🇺🇸 US | Front LeftAutomatic trans. | View on Amazon |
| CARDONE Fits: 2.4L L4 | 663587 | 🇺🇸 US | Front Right | View on Amazon |
| GSP Fits: 2.4L L4 | NCV75032 | 🇺🇸 US | Front Left | View on Amazon |
| GSP Fits: 2.4L L4 | NCV75034 | 🇺🇸 US | Front Right | View on Amazon |
| TOP NOTCH Fits: 2.4L L4 | TN60235 | 🇺🇸 US | Front Left | View on Amazon |
| TOP NOTCH Fits: 2.4L L4 | TN60237 | 🇺🇸 US | Front Right | View on Amazon |
| TRAKMOTIVE Fits: 2.4L L4 | KA8115 | 🇺🇸 US | AAR Joint Design | View on Amazon |
| TRAKMOTIVE Fits: 2.4L L4 | HY8263 | 🇺🇸 US | Front LeftAutomatic trans. | View on Amazon |
| TRAKMOTIVE Fits: 2.4L L4 | HY8300 | 🇺🇸 US | Front RightManual trans. | View on Amazon |
| TRAKMOTIVE Fits: 2.4L L4 | KA8116 | 🇺🇸 US | AAR Joint Design | 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.
17 CV Axle parts for the 2008 Kia Optima come from 7 brands — CARDONE, TRAKMOTIVE, GSP and 4 other brands. The "Popular" part is CARDONE 603585.
The Economy section lists 6 options from CARDONE, HERI and FAMOUS BRAND — the catalog's value-priced group. CARDONE 603585 is listed in this group.
In the Standard Replacement grade, TRAKMOTIVE, CARDONE, GSP and 2 other brands supply 11 parts: built to original-equipment specification. A representative part number is APWI KA8017A.
CV Joint Boot
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BECK/ARNLEY Fits: 2.4L L4 | 1032892 | 🇺🇸 US | Front Outer | View on Amazon |
| BECK/ARNLEY Fits: 2.4L L4 | 1032971 | 🇺🇸 US | 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 2008 Kia Optima come from BECK/ARNLEY.
This group includes BECK/ARNLEY 1032892 and BECK/ARNLEY 1032971.
Differential Carrier Bearing / Race
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WJB / INMOTION PARTS Popular Fits: 2.4L L4 | WTA35 | 🇺🇸 US | Bearing Shape: CylindricalBearing & Race Set | View on Amazon |
| WJB / INMOTION PARTS Fits: 2.4L L4 | WTLM501310 | 🇺🇸 US | Race | View on Amazon |
| WJB / INMOTION PARTS Fits: 2.4L L4 | WT32009X | 🇺🇸 US | Manual trans.with Hyundai M5GF2 Transmission | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Popular Fits: 2.4L L4 | A35 | 🇺🇸 US 🇨🇦 CA | GoldIncludes LM501349 & LM501310 | View on Amazon |
| SKF Popular Fits: 2.4L L4 | BR35 | 🇺🇸 US | Automatic trans. | View on Amazon |
| BCA Fits: 2.4L L4 | NBA35 | 🇺🇸 US | Bearing Shape: Cylindrical or Taper Bearing SetBearing & Race | View on Amazon |
| BCA Fits: 2.4L L4 | NB32009X | 🇺🇸 US | Bearing & Race Set | View on Amazon |
| NATIONAL Fits: 2.4L L4 | A35 | 🇺🇸 US | Taper Bearing Set Includes Cup and ConeBearing & Race Set | View on Amazon |
| NATIONAL Fits: 2.4L L4 | 32009X | 🇺🇸 US | Manual trans.with Hyundai M5GF2 Transmission | View on Amazon |
| SCHAEFFLER Fits: 2.4L L4 | KLM501349 | 🇺🇸 US | Bearing Only | View on Amazon |
| SCHAEFFLER Fits: 2.4L L4 | KT45 | 🇺🇸 US | Bearing and Race Set | View on Amazon |
| SKF Fits: 2.4L L4 | LM501310VP | 🇺🇸 US | Race | View on Amazon |
This table covers the bearings and races that support the differential carrier.
12 Differential Carrier Bearing / Race parts for the 2008 Kia Optima come from 6 brands — WJB / INMOTION PARTS, SKF, BCA and 3 other brands. The "Popular" part is WJB / INMOTION PARTS WTA35.
The Economy section: 3 options from WJB / INMOTION PARTS. WJB / INMOTION PARTS WTA35 is listed in this group.
Standard Replacement: 9 parts, from SKF, BCA, NATIONAL and 2 other brands. A representative part number is ACDELCO A35.
Gear Oil
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| IDEMITSU Fits: 2.4L L4 | 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 2008 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. Every drivetrain 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 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 Differential Carrier Bearing / Race .
Frequently Asked Questions
How many drivetrain parts fit the 2008 Kia Optima?
Our catalog currently lists 32 drivetrain parts for the 2008 Kia Optima across 4 subcategories and 15 brands, covering both the 2.4L L4 and the 2.7L V6. Each part is matched to the engine(s) it fits.
Do drivetrain parts differ between 2008 Kia Optima engines?
Yes. Every drivetrain 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 drivetrain problems on a 2008 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 2008 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 2008 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 2008 Kia Optima
Drivetrain Parts for Other Kia Optima Years
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