2022-2025 Kia Carnival Rear Coil Spring: Sagging, Noise, and Replacement Guide
This guide covers common failure symptoms, inspection tips for used parts, and replacement costs for the rear coil springs on your 2022-2025 Kia Carnival.
- The 2022-2025 Kia Carnival has no widespread issues or recalls for its rear coil springs; failures are typically isolated incidents.
- When buying a used spring, always inspect for cracks and heavy corrosion, and always replace them in pairs to ensure an even ride height.
- As of early 2026, there are no major aftermarket rear coil springs available, making used OEM parts the best value for repair.
- Replacement is DIY-friendly for those with mechanical experience and does not require a spring compressor, but a wheel alignment is required afterward.
Symptoms of Failing Rear Coil Springs
Because the 2022-2025 Kia Carnival is a relatively new vehicle, coil spring failure is more likely to result from a manufacturing defect or impact damage (like hitting a large pothole) than from simple age-related fatigue. However, the symptoms remain the same. Here’s what to look and listen for:
- Sagging Rear End: The most obvious sign is a visibly lower ride height in the rear of the vehicle. You may notice one corner is lower than the other, or the entire rear end sits lower than the front. This can be more pronounced when the vehicle is loaded with passengers or cargo.
- Clunking or Rattling Noises: If a spring has cracked or broken, you may hear sharp clunking or rattling sounds when driving over bumps. This is the sound of the broken pieces of the spring shifting or making contact with other suspension components.
- Poor Handling and Instability: Worn or broken springs can make the vehicle feel less stable, especially at higher speeds or during turns. You might experience excessive body roll when cornering or a general “floaty” feeling from the rear of the vehicle.
- Uneven Tire Wear: A collapsed spring alters the suspension geometry, which can lead to accelerated and uneven wear on the inside or outside edge of the rear tires.
- Visible Damage: A visual inspection may reveal a cracked or broken coil. Look for fractures in the spring, typically near the top or bottom where it sits in its perch. Heavy corrosion can also be a sign of weakening metal.
Known Issues, TSBs, and Recalls
As of early 2026, there are no specific recalls or widespread Technical Service Bulletins (TSBs) from Kia or the National Highway Traffic Safety Administration (NHTSA) for the rear coil springs on the 2022-2025 Kia Carnival. While there have been recalls for other components on the Carnival, such as sliding doors and tow hitch wiring, the rear suspension has proven to be reliable. The absence of known issues means that any failure is likely an isolated incident rather than a systemic design flaw.
Compatibility Warning: The primary OEM part number for this rear coil spring is 55340-R0150. However, some listings show a different part number (55340-R0050) for models with 19-inch wheels. Always verify the correct part number for your specific vehicle's VIN and trim level before purchasing.
Buying a Used Coil Spring: What to Check
Purchasing a used OEM coil spring is an excellent way to save money, especially since quality aftermarket options are not yet widely available for the 2022-2025 Carnival. A used original part guarantees the correct spring rate and dimensions designed by Kia. Here’s what to inspect:
- Inspect for Cracks: This is the most critical check. Carefully examine the entire length of the spring, paying close attention to the top and bottom coils where they seat. Look for any hairline fractures or complete breaks. A cracked spring is unsafe and unusable.
- Check for Corrosion: Surface rust is normal, but you should avoid springs with deep, flaky rust or pitting. Heavy corrosion weakens the steel and can lead to premature failure. The original protective coating should be mostly intact.
- Measure the Free Height: If possible, get springs as a matched pair from the same vehicle. Measure their uncompressed height (free height) to ensure they are the same. A significant difference indicates one spring has sagged more than the other, which will result in an uneven ride height.
- Verify the Part Number: If there are any paint markings or tags, try to match them to your original spring. Given the potential for different spring rates between trim levels, getting a part from a vehicle with the same options is the safest bet.
- Buy in Pairs: It is highly recommended to replace both rear coil springs at the same time. This ensures an even ride height and predictable handling. Replacing only one can lead to suspension imbalance and is generally not advised.
Pro Tip: A low-mileage used OEM spring is often a better choice than a cheap, new aftermarket spring (if one were available). The OEM part is made from high-quality steel and is guaranteed to have the correct spring rate and height for your Carnival's specific weight and handling characteristics.
Replacement Difficulty
Replacing the rear coil springs on a 2022-2025 Kia Carnival is a moderately difficult job that a knowledgeable DIY mechanic can perform. The rear suspension design does not require a dangerous spring compressor tool, which makes the process safer than working on front struts.
- Difficulty: 3 out of 5
- Estimated Time: 1.5 - 2.5 hours
- DIY Feasible: Yes
The basic procedure involves lifting the rear of the vehicle, removing the wheel, placing a jack under the lower control arm for support, and unbolting the lower shock absorber and the sway bar link. The jack can then be slowly lowered, allowing the control arm to drop and relieving all tension from the coil spring, which can then be easily removed. Installation is the reverse of removal.
🎬 Watch this video for an easy walkthrough of the removal and installation process.Torque Specifications
While specific torque specs for the Carnival were not available, a TSB for a similar Kia multi-link rear suspension provides the following values, which should be used as a close guide. Always tighten suspension components with the vehicle's weight on the suspension (at normal ride height) to avoid pre-loading and damaging the bushings.
| Component | Torque (lb-ft) | Torque (N.m) |
|---|---|---|
| Lower Shock Absorber Bolt | 72.3 – 86.7 | 98.0 – 117.6 |
| Stabilizer Link Nut | 14.5 – 21.7 | 19.6 – 29.4 |
| Wheel Lug Nuts | 79.6 – 94.0 | 107.9 – 127.5 |
Cost Comparison
Replacing the rear coil springs involves the cost of the parts and labor. Since aftermarket options are not readily available, the comparison is primarily between new OEM and used OEM parts.
| Item | Estimated Cost | Notes |
|---|---|---|
| New OEM (Pair) | $270 - $320 | Purchased from a Kia dealership parts department. |
| New Aftermarket (Pair) | Not Available | As of early 2026, no major aftermarket brands offer this part. |
| Used OEM (Pair) | $80 - $150 | Price varies based on condition and source. |
| Shop Labor | $150 - $300 | Based on 1.5-2.5 hours at a typical independent shop rate. |
| Total (DIY with Used) | $80 - $150 | Significant savings for DIY repair. |
| Total (Shop with New) | $420 - $620 | Typical cost for professional installation with new parts. |
Frequently Asked Questions (FAQ)
Do I need to get a wheel alignment after replacing rear coil springs?
Yes, it is highly recommended. Changing the coil springs will affect the vehicle's ride height, which in turn changes the camber and toe alignment settings. A proper four-wheel alignment is necessary to prevent premature tire wear and ensure proper handling.
Can I replace just one broken coil spring?
It is strongly recommended to replace coil springs in pairs on the same axle. A new spring will have a slightly different height and stiffness compared to the old one on the other side, which can cause an uneven ride height, vehicle instability, and unpredictable handling.
Can I install heavy-duty or towing springs on my Carnival?
Currently, there are no specific heavy-duty or towing-oriented aftermarket springs for the 2022-2025 Carnival. Using a spring not designed for the vehicle can negatively impact ride quality, handling, and the function of electronic stability control systems. For towing, ensure you are within the vehicle's specified tongue weight and payload limits.
What causes a coil spring to break on a new vehicle?
On a newer vehicle like the Carnival, a broken spring is most often caused by a sudden, severe impact like hitting a deep pothole or curb at speed. It can also be the result of a rare manufacturing defect in the steel or its coating, which allows corrosion to weaken a specific point on the coil.
Helpful Videos
Technical Specifications
OEM Part Numbers: 55340-R0150 55340R0150 55340-R0050
Varies by trim level and wheel size. Always confirm fitment with VIN.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Kia Carnival: