# Transit Auto K78A-100365 Front Suspension Strut and Coil Spring Assembly for 2011-2012 Hyundai Sonata, Kia Optima

### Performance Overview

Transit Auto offers the most comprehensive and highest-quality replacement kits on the market. Thanks to our cutting-edge AI, in-house product team, and proprietary fitment data, we are able to build and deliver the most accurate kits on the market. All our kits include the highest-quality parts on the market, sourced directly by Transit and its sub-brands. Backed by over 50 years of experience and with in-house quality assurance, every customer Transit Auto K78A-100365 is a vehicle-specific suspension strut and coil spring assembly designed for compatible applications for 2011-2012 Hyundai, Kia Sonata, Optima.

### Key Features

-   Includes everything you need for strut replacement in a single, fully assembled unit with no need for a spring compressor
-   Precisely calibrated to meet the OE design, each application-specific coil spring type is engineered to restore ride height and support the vehicle's weight
-   Application-specific coil spring, mount and strut designs ensure optimized ride and handling experience unique to each vehicle profile
-   Preassembled upper strut mount, coil spring, and strut feature an OE-style design for seamless fit, form, and function
-   Manufactured with high-quality steel, featuring a superior tube and weld design to deliver structural integrity and durability

### Vehicle Fitment

**Fitment Position:** Front

**Fitment Summary:** 2011-2012 Hyundai, Kia Sonata, Optima

**Position:** Front

-   2012 Hyundai Sonata — Position: Front; Fitment Precision: 2.0L; Note: To 11/29/11
-   2012 Hyundai Sonata — Position: Front; Fitment Precision: 2.4L and with GAS engine; Note: With Sport Suspension and To 11/29/11
-   2012 Kia Optima — Position: Front; Fitment Precision: GAS engine; Note: With Sport Suspension and To 11/29/11 and Vehicles Manufactured In Korea
-   2011 Hyundai Sonata — Position: Front; Fitment Precision: 2.0L; Note: From 06/01/11
-   2011 Hyundai Sonata — Position: Front; Fitment Precision: 2.4L and with GAS engine; Note: With Sport Suspension and From 06/01/11
-   2011 Kia Optima — Position: Front; Note: With Sport Suspension and Vehicles Manufactured In Korea

### FAQ

**Will this fit my vehicle?**  
Please verify your year, make, model, position, and any fitment notes using the compatibility list above before purchase.

**What part number is this?**  
The listed part number is K78A-100365.

**Is this product designed for direct replacement?**  
Yes. This product is intended to match compatible vehicle applications listed in the fitment section.

**Should I confirm fitment before ordering?**  
Yes. Always compare your original part, position, and vehicle details with the fitment chart before ordering.

### Common Searches

-   Suspension Strut and Coil Spring Assembly for Sonata
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-   K78A-100365 fitment
-   Transit Auto Suspension Strut and Coil Spring Assembly
-   Front Suspension Strut and Coil Spring Assembly
-   2011 Hyundai Sonata Suspension Strut and Coil Spring Assembly

### Vehicle Fitment Table

Year

Make

Model

Position

Fitment Precision

Note

2012

Hyundai

Sonata

Front

2.0L

To 11/29/11

2012

Hyundai

Sonata

Front

2.4L and with GAS engine

With Sport Suspension and To 11/29/11

2012

Kia

Optima

Front

GAS engine

With Sport Suspension and To 11/29/11 and Vehicles Manufactured In Korea

2011

Hyundai

Sonata

Front

2.0L

From 06/01/11

2011

Hyundai

Sonata

Front

2.4L and with GAS engine

With Sport Suspension and From 06/01/11

2011

Kia

Optima

Front

With Sport Suspension and Vehicles Manufactured In Korea

## Details

- **Price:** 402.3 CAD
- **Vendor:** Transit Auto
- **Type:** Suspension Strut and Coil Spring Assembly
- **Tags:** 2011 Hyundai Sonata, 2011 Kia Optima, 2012 Hyundai Sonata, 2012 Kia Optima, 2012-2012-hyundai-sonata-suspension-strut-and-coil-spring-assembly-front-2-0l-to-11-29-11-esi6727449, Automotive Parts, Daily Driver, Direct Replacement, Front, K78A-100365, Suspension Strut and Coil Spring Assembly, Suspension Strut Coil Spring Assembly Kit, Transit Auto, Transit Auto K78A-100365, Vehicle Fitment

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 402.30 CAD | In stock |

## Images

- Transit Auto K78A-100365 Suspension Strut and Coil Spring Assembly for 2011-2012 Hyundai Sonata, Kia Optima - Front product image

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/transit-auto-k78a-100365-suspension-strut-and-coil-spring-assembly-for-2011-2012-hyundai-sonata-kia-optima-front-k78a-100365)
> Updated: 2026-07-15