2024 Kia EV9 suspension problems
severe Owners of the 2024 Kia EV9 have filed 17 NHTSA complaints about the suspension at roughly $900 to repair (U.S. federal records, as of July 2026). Source: NHTSA Office of Defects Investigation. See suspension across all vehicles →
The failure pattern owners describe
The 2024 Kia EV9 exhibits a consistent pattern of rear suspension failure across 16 separate complaints. Owners report pronounced lateral sway, porpoising, and skip-hopping of the rear end when hitting potholes, expansion joints, or any road irregularity—especially at highway speeds (55–75 mph). Multiple drivers describe needing steering corrections to maintain lane position and feeling like the vehicle will spin out of control. The sensation is particularly alarming in snow or adverse weather, where drivers cannot distinguish between real slides and the vehicle's own violent lurching.
Compounding the handling issue is catastrophic rear-tire wear: rear tires are being shredded to bare threads and steel belts in 2,700–4,000 miles of driving. One dealer service manager, speaking on a recorded call, confirmed seeing multiple EV9s under 18,000 miles destroy tires and called it a fleet-wide pattern. Authorized Kia dealerships have performed multiple alignments and inspections without fixing either problem; one service adviser admitted the real problem is undiagnosed.
A separate complaint documents repeated rear inverter failures and a vehicle fire at 10,600 miles. Another owner reports unresolved vibrations at highway speeds despite tire replacement, wheel replacement, and road force balancing. Dealers have declined to acknowledge third-party wheel inspections or issue technical service bulletins for the suspension defect.
Failure modes owners describe
Rear suspension instability / bump-steer and lateral swaying
Rear end exhibits pronounced side-to-side sway, porpoising, and lateral oscillation when the vehicle encounters road imperfections (potholes, expansion joints, uneven pavement, seams) at highway speeds (55–75 mph). Owners report the rear end 'whipping around,' 'skipping,' or feeling like it's 'about to lose control.' Steering correction is often required to maintain lane position. The issue occurs at lower speeds (20–40 mph) but is more pronounced and concerning at highway speeds. Multiple owners describe it as feeling like 'a wheel falling off' or comparing it to a 3/4-ton pickup's handling.
When: Typically from 200–300 miles on new vehicle; persistent across all reported mileages under 25,486 miles
Symptoms owners cite: Pronounced rear-end lateral sway and oscillation when hitting bumps, potholes, or road seams; Vehicle porpoising and skipping sensation over road imperfections; Uncontrolled or near-uncontrolled swaying requiring driver steering correction; Loss of confidence in vehicle stability, especially in adverse weather; Disorientating side-to-side motion taking 1–2 seconds to stabilize; Rear-end feels unstable compared to front; sensation worse in rear two rows
Repairs/costs cited: Multiple dealer alignments (including at authorized Kia dealerships) have been performed with no resolution. Tire rebalancing and road force balancing (values reported below 16) have been attempted without correcting the issue. One dealer replicated the swaying on both the customer's vehicle and a new unit off the lot (service invoice 11/11/2024). Dealers state no warning codes, lights, or diagnostic indicators present. One service advisor stated 'There's got to be an elephant in the room somewhere' and admitted undiagnosed defect exists; another stated 'I wouldn't feel safe putting my guys in it.' No TSB (Technical Service Bulletin) has been issued.
Recalls/TSBs owners mention: No official TSB issued for 2024 and 2025 model year vehicles. Manufacturer was made aware of rear suspension defects in at least two cases (complaint #4 and #5); case files were filed. One dealer claimed the issue is a 'known issue' but stated there is no known fix.
Catastrophic rear tire wear in under 3,000 miles
Rear tires are wearing down to bare threads (1/32″ tread or less, down to steel belts) in 2,700–4,000 miles of driving despite multiple professional alignments. Two tire sets were destroyed in 4 months. The wear is rear-axle-only on an all-wheel-drive vehicle, indicating a rear suspension or alignment defect rather than load rating or overloading (which would affect all four tires equally). Owner documentation shows front tires retaining 7/32″–10/32″ tread while rear tires are at 1/32″.
When: Two complete tire sets destroyed in 4 months (October 2025, January 2026); winter tires that drove 4,000 miles the first winter were destroyed in 2,700 miles the second winter. Rear tires fail as early as 10,000–12,668 miles.
Symptoms owners cite: Rapid rear-tire wear (bald, down to steel belts, torn threads); Rear-only wear pattern on AWD vehicle despite two professional alignments; Left rear tire blowout while driving at 35 mph; Bald tires with steel belts visible; abnormal slapping sound from rear tires; Disparity between rear tread (1/32″) and front tread (7/32″–10/32″) after same mileage
Repairs/costs cited: Professional alignments performed at independent shop (Town Fair Tire, May 2025) and authorized Kia dealer (Berlin City, Vermont, October 2025) with no resolution and no before/after documentation provided by dealer. Tire replacements, suspension component replacement (cant, suspension, tires replaced; wheels aligned per complaint #5), and multiple multi-point inspections performed. One dealer admitted seeing multiple EV9s under 18,000 miles destroy tires and confirmed fleet-wide pattern on recorded call (1/7/26). Another dealer diagnosed the issue as caused by battery weight causing suspension tilt (CANT) of 2+ inches, suspecting suspension failure.
Recalls/TSBs owners mention: Manufacturer was made aware in at least one case (complaint #5) and case file was filed. One dealer service manager stated 'I can't tell you why the alignment is out,' indicating inability to diagnose root cause.
Vibration at highway speeds (60–75 mph) unresolved after multiple repairs
Vehicle experiences significant, persistent vibrations throughout the cabin (felt in steering wheel and center console) at highway speeds despite multiple dealership repair attempts. Vibrations began or worsened following tire replacement, wheel replacement, and road force balancing. One third-party wheel inspection found a fourth wheel defective and out of round, which the dealership had not replaced.
When: Vibration started at 70 mph, then worsened to begin at 60 mph after dealership repairs
Symptoms owners cite: Noticeable vibrations felt in steering wheel and center armrest console at 60–75 mph; Vibrations cause discomfort and potential safety risk, especially on long drives; Vibrations worsened after tire and wheel replacement by dealership; Multiple wheels found with lateral runout; one wheel out of round
Repairs/costs cited: Dealership replaced one defective tire (December 2024), then replaced all remaining three tires (January 2025), then replaced three wheels with lateral runout and performed road force balancing with values reportedly below 16 (February 2025). Third-party wheel shop inspection revealed the fourth wheel (not replaced by Kia) was defective and out of round. Despite findings, Kia dealer dismissed concerns and referred owner to another dealership for second opinion. Dealer stated third-party evaluations are not accepted.
Rear inverter failure and vehicle fire
Rear inverter failed multiple times in rapid succession, resulting in loss of motive power, warning lights, smoke exiting from the rear, and ultimately a vehicle fire. Fire department extinguished the fire; unofficial report indicated fire originated from rear of vehicle. The rear inverter was replaced three times, with failure recurring after each replacement. Fire occurred just days after the third replacement.
When: Approximately 10,600 miles; fire occurred after third inverter replacement within days
Symptoms owners cite: Multiple warning lights illuminated; Loss of motive power; Smoke exiting from rear of vehicle; Vehicle fire requiring fire department intervention
Repairs/costs cited: Rear inverter replaced three times. Manufacturer was made aware and case was filed. Owner was in negotiations regarding lemon law buyback prior to fire.
Recalls/TSBs owners mention: Manufacturer was made aware and case was filed.
Synthesized from 17 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 0 most recent
Common questions
How serious is the suspension problem on the 2024 Kia EV9?
It's a meaningful issue. 17 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $900.
At what mileage does the suspension typically fail?
Based on the 17 complaints filed, suspension issues most often appear around 11,634 miles. Some report problems earlier; some make it well past 150,000 with no symptoms. Maintenance habits matter — vehicles that received timely fluid services and were not regularly overworked tend to last longer.
What does it cost to fix?
Independent shops typically charge around $900 for suspension repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to suspension?
No active recalls currently cover suspension issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.