The 2006 Kia Optima has 81 drivetrain parts with verified fitment on this page — 5 part types and 18 brands, covering both the 2.4L L4 and the 2.7L V6. Each part includes a manufacturer part number and application notes.
The drivetrain system on the 2006 Kia Optima moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware. The largest groups are CV Axle (55 parts), Differential Carrier Bearing / Race (16 parts) and CV Joint Boot (8 parts). The other 2 part types cover the remaining 2 parts.
The 2006 Kia Optima was sold with both the 2.4L L4 and the 2.7L V6. 24 parts fit every engine; the other 57 are engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2006 Kia Optima drivetrain parts are CARDONE (20 parts), TRAKMOTIVE (8 parts) and TOP NOTCH (7 parts), plus 15 more brands. Quality grades include Standard Replacement and Economy.
15 parts on this 2006 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 MEVOTECH DX437 (CV Joint Boot). 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 |
| HERI Popular Fits: 2.4L L4 | 88513 | 🇺🇸 US | Front Left | View on Amazon |
| AUTO EXTRA Fits: 2.4L L4 | HY88544A | 🇺🇸 US 🇨🇦 CA | Front RightVIN D (5th digit) | View on Amazon |
| AUTO EXTRA Fits: 2.7L V6 | HY88529A | 🇺🇸 US 🇨🇦 CA | Front LeftVIN D (5th Digit) | View on Amazon |
| AUTO EXTRA Fits: 2.7L V6 | HY88564A | 🇺🇸 US 🇨🇦 CA | Front RightVIN D (5th digit) | View on Amazon |
| CARDONE Fits: 2.4L L4 | 603357 | 🇺🇸 US | Remanufactured | View on Amazon |
| CARDONE Fits: 2.4L L4 | 603405 | 🇺🇸 US | Remanufactured | View on Amazon |
| CARDONE Fits: 2.4L L4 | 603402 | 🇺🇸 US | Remanufactured | View on Amazon |
| CARDONE Fits: 2.4L L4 | 603403 | 🇺🇸 US | Remanufactured | View on Amazon |
| CARDONE Fits: 2.4L L4 | 603584 | 🇺🇸 US | Remanufactured | View on Amazon |
| CARDONE Fits: 2.4L L4 | 603586 | 🇺🇸 US | Remanufactured | View on Amazon |
| CARDONE Fits: 2.4L L4 | 603589 | 🇺🇸 US | Remanufactured | View on Amazon |
| CARDONE Fits: 2.7L V6 | 603593 | 🇺🇸 US | RemanufacturedPackage Contents: Complete Axle | View on Amazon |
| CARDONE Fits: 2.7L V6 | 603592 | 🇺🇸 US | Remanufactured | View on Amazon |
| CARDONE Fits: 2.7L V6 | 603406 | 🇺🇸 US | Remanufactured | View on Amazon |
| CARDONE Fits: 2.7L V6 | 603407 | 🇺🇸 US | Remanufactured | View on Amazon |
| CARDONE Fits: 2.7L V6 | 603533 | 🇺🇸 US | Remanufactured | View on Amazon |
| CARDONE Fits: 2.7L V6 | 603534 | 🇺🇸 US | Remanufactured | View on Amazon |
| FAMOUS BRAND Fits: 2.4L L4 | NCV37505 | 🇺🇸 US 🇨🇦 CA | LeftFront | View on Amazon |
| FAMOUS BRAND Fits: 2.4L L4 | NCV37506 | 🇺🇸 US 🇨🇦 CA | RightFront | View on Amazon |
| FAMOUS BRAND Fits: all 2006 Optima engines | NCV547946 | 🇺🇸 US 🇨🇦 CA | LeftFront | View on Amazon |
| FAMOUS BRAND Fits: 2.7L V6 | NCV75521 | 🇺🇸 US 🇨🇦 CA | LeftFront | View on Amazon |
| FAMOUS BRAND Fits: 2.7L V6 | NCV75522 | 🇺🇸 US 🇨🇦 CA | RightFront | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| APWI Popular Fits: all 2006 Optima engines | IZ8360A | 🇺🇸 US | Front LeftEngine VIN 6 | View on Amazon |
| APWI Popular Fits: all 2006 Optima engines | KA8017A | 🇺🇸 US | Front LeftEngine VIN 3 | View on Amazon |
| APWI Popular Fits: 2.7L V6 | KA8024A | 🇺🇸 US | Front RightEngine VIN 4 | View on Amazon |
| TOP NOTCH Popular Fits: 2.7L V6 | TN60193 | 🇺🇸 US | Front LeftEngine VIN 8 | View on Amazon |
| TOP NOTCH Popular Fits: 2.7L V6 | TN60194 | 🇺🇸 US | Front RightEngine VIN 8 | View on Amazon |
| TRAKMOTIVE Popular Fits: 2.4L L4 | HY8019 | 🇺🇸 US | Front LeftEngine VIN 6 | View on Amazon |
| TRAKMOTIVE Popular Fits: 2.4L L4 | HY8018 | 🇺🇸 US | Front RightAutomatic trans. | View on Amazon |
| TRAKMOTIVE Popular Fits: 2.7L V6 | HY8027 | 🇺🇸 US | Front Right | View on Amazon |
| APWI Fits: 2.4L L4 | IZ8362A | 🇺🇸 US | Front RightEngine VIN 6 | View on Amazon |
| APWI Fits: 2.7L V6 | IZ8361A | 🇺🇸 US | Front RightEngine VIN 8 | View on Amazon |
| CARDONE Fits: 2.4L L4 | 663405 | 🇺🇸 US | Front RightEngine VIN 6 | View on Amazon |
| CARDONE Fits: all 2006 Optima engines | 663406 | 🇺🇸 US | Front LeftEngine VIN 6 | View on Amazon |
| CARDONE Fits: all 2006 Optima engines | 663593 | 🇺🇸 US | Front LeftEngine VIN 3 | View on Amazon |
| CARDONE Fits: 2.4L L4 | 663587 | 🇺🇸 US | Front RightEngine VIN 3 | View on Amazon |
| CARDONE Fits: 2.7L V6 | 663407 | 🇺🇸 US | Front RightEngine VIN 8 | View on Amazon |
| CARDONE Fits: 2.7L V6 | 663532 | 🇺🇸 US | Front RightEngine VIN 4 | View on Amazon |
| GSP Fits: 2.4L L4 | NCV37505 | 🇺🇸 US | Front LeftEngine VIN 6 | View on Amazon |
| GSP Fits: 2.4L L4 | NCV37506 | 🇺🇸 US | Front RightEngine VIN 6 | View on Amazon |
| GSP Fits: all 2006 Optima engines | NCV75032 | 🇺🇸 US | Front LeftEngine VIN 3 | View on Amazon |
| GSP Fits: 2.4L L4 | NCV75034 | 🇺🇸 US | Front RightEngine VIN 3 | View on Amazon |
| GSP Fits: 2.7L V6 | NCV75521 | 🇺🇸 US | Front LeftEngine VIN 8 | View on Amazon |
| GSP Fits: 2.7L V6 | NCV75522 | 🇺🇸 US | Front RightEngine VIN 8 | View on Amazon |
| GSP Fits: 2.7L V6 | NCV75033 | 🇺🇸 US | Front RightEngine VIN 4 | View on Amazon |
| TOP NOTCH Fits: 2.4L L4 | TN60121 | 🇺🇸 US | Front LeftEngine VIN 6 | View on Amazon |
| TOP NOTCH Fits: 2.4L L4 | TN60122 | 🇺🇸 US | Front RightEngine VIN 6 | View on Amazon |
| TOP NOTCH Fits: all 2006 Optima engines | TN60235 | 🇺🇸 US | Front LeftEngine VIN 3 | View on Amazon |
| TOP NOTCH Fits: 2.4L L4 | TN60237 | 🇺🇸 US | Front RightEngine VIN 3 | View on Amazon |
| TOP NOTCH Fits: 2.7L V6 | TN60236 | 🇺🇸 US | Front RightEngine VIN 4 | 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 |
| TRAKMOTIVE Fits: 2.7L V6 | HY8024 | 🇺🇸 US | Front Left | 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.
55 CV Axle parts for the 2006 Kia Optima come from 8 brands — CARDONE, TOP NOTCH, TRAKMOTIVE and 5 other brands. The "Popular" part is CARDONE 603585. Grades run from Economy through Standard Replacement; Standard Replacement is the most populated section, led by TOP NOTCH, TRAKMOTIVE, GSP and 2 other brands.
CV Intermediate Shaft
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TRAKMOTIVE Fits: 2.7L V6 | KA3525 | 🇺🇸 US | Front RightVIN E (5th Digit) | View on Amazon |
This table covers the CV Intermediate shafts.
One part is listed for the 2006 Kia Optima — TRAKMOTIVE KA3525.
CV Joint Boot
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MEVOTECH Popular Fits: 2.4L L4 | DX437 | 🇺🇸 US | Front OuterEngine VIN 6 | View on Amazon |
| BECK/ARNLEY Fits: 2.4L L4 | 1032892 | 🇺🇸 US | Front OuterDesign, 5th VIN Digit is E | View on Amazon |
| BECK/ARNLEY Fits: 2.4L L4 | 1032971 | 🇺🇸 US | Front InnerDesign, 5th VIN Digit is E | View on Amazon |
| BECK/ARNLEY Fits: 2.4L L4 | 1032855 | 🇺🇸 US | Front InnerOld Design, 5th VIN Digit is D | View on Amazon |
| BECK/ARNLEY Fits: 2.7L V6 | 1032969 | 🇺🇸 US | Front Inner | View on Amazon |
| MEVOTECH Fits: 2.4L L4 | DX861 | 🇺🇸 US | Front InnerEngine VIN 6 | View on Amazon |
| MEVOTECH Fits: 2.7L V6 | DX892 | 🇺🇸 US | Front Outer | View on Amazon |
| MEVOTECH Fits: 2.7L V6 | DX789 | 🇺🇸 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.
8 CV Joint Boot parts for the 2006 Kia Optima come from 2 brands — MEVOTECH and BECK/ARNLEY. The "Popular" part is MEVOTECH DX437.
Listed part numbers: MEVOTECH DX437, BECK/ARNLEY 1032892 and BECK/ARNLEY 1032971, plus the other parts above.
Differential Carrier Bearing / Race
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WJB / INMOTION PARTS Popular Fits: all 2006 Optima engines | WTA35 | 🇺🇸 US | Bearing Shape: CylindricalBearing & Race Set | View on Amazon |
| WJB / INMOTION PARTS Fits: all 2006 Optima engines | WTLM501310 | 🇺🇸 US | Race | View on Amazon |
| WJB / INMOTION PARTS Fits: all 2006 Optima engines | WT32009X | 🇺🇸 US | Manual trans.with Hyundai M5GF2 Transmission | View on Amazon |
| WJB / INMOTION PARTS Fits: all 2006 Optima engines | WT30207 | 🇺🇸 US | Bearing & Race Set | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Popular Fits: all 2006 Optima engines | A35 | 🇺🇸 US 🇨🇦 CA | GoldIncludes LM501349 & LM501310 | View on Amazon |
| BCA Popular Fits: all 2006 Optima engines | NBA35 | 🇺🇸 US | Bearing Shape: Cylindrical or Taper Bearing SetBearing & Race | View on Amazon |
| SKF Popular Fits: all 2006 Optima engines | BR35 | 🇺🇸 US | Automatic trans. | View on Amazon |
| BCA Fits: all 2006 Optima engines | NB32009X | 🇺🇸 US | Bearing & Race Set | View on Amazon |
| BCA Fits: all 2006 Optima engines | NB30207 | 🇺🇸 US | Bearing & Race Set | View on Amazon |
| NATIONAL Fits: all 2006 Optima engines | A35 | 🇺🇸 US | Taper Bearing Set Includes Cup and ConeBearing & Race Set | View on Amazon |
| NATIONAL Fits: all 2006 Optima engines | 32009X | 🇺🇸 US | Manual trans.with Hyundai M5GF2 Transmission | View on Amazon |
| NATIONAL Fits: all 2006 Optima engines | 30207 | 🇺🇸 US | Bearing & Race Set | View on Amazon |
| SCHAEFFLER Fits: all 2006 Optima engines | KLM501349 | 🇺🇸 US | Bearing Only | View on Amazon |
| SCHAEFFLER Fits: all 2006 Optima engines | KT45 | 🇺🇸 US | Bearing and Race Set | View on Amazon |
| SKF Fits: all 2006 Optima engines | LM501310VP | 🇺🇸 US | Race | View on Amazon |
| TIMKEN Fits: all 2006 Optima engines | 32009X | 🇺🇸 US | Manual trans.M5GF2 | View on Amazon |
This table covers the bearings and races that support the differential carrier.
16 Differential Carrier Bearing / Race parts for the 2006 Kia Optima come from 7 brands — WJB / INMOTION PARTS, BCA, NATIONAL and 4 other brands. The "Popular" part is WJB / INMOTION PARTS WTA35. Every part fits both the 2.4L L4 and the 2.7L V6.
The Economy section lists 4 options from WJB / INMOTION PARTS — the catalog's value-priced group. WJB / INMOTION PARTS WTA35 is listed in this group.
In the Standard Replacement grade, BCA, NATIONAL, SKF and 3 other brands supply 12 parts: built to original-equipment specification. A representative part number is ACDELCO A35.
Gear Oil
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| IDEMITSU Fits: all 2006 Optima engines | 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 2006 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 Differential Carrier Bearing / Race .
Frequently Asked Questions
How many drivetrain parts fit the 2006 Kia Optima?
Our catalog currently lists 81 drivetrain parts for the 2006 Kia Optima across 5 subcategories and 18 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 2006 Kia Optima engines?
Some do. 24 parts fit every engine; the other 57 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 2006 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 2006 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 2006 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 2006 Kia Optima
Drivetrain Parts for Other Kia Optima Years
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