NHTSA lists 2 safety recalls and 33 owner complaints for the 2017 Kia Cadenza. Most complaints involve engine (12) and electrical system (6). The EPA rates it 23 mpg combined.
Kia Motors America (Kia) is recalling certain 2017-2021 Sportage and Cadenza vehicles. The electrical circuit in the Hydraulic Electronic Control Unit (HECU) may short-circuit, which can cause a fire in the engine compartment.
Kia Motors America (Kia) is recalling certain 2017 Cadenza vehicles. The brake vacuum hose on the affected vehicles may kink, reducing braking performance.
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
“COMPONENT: Engine oil pressure sending unit/switch (part 94751-3C000, per Kia repair shop) or the oil pressure system on my 2017 Kia Cadenza 3.3L V6, about 95,500 miles. The car and any removed part are available for inspection on request. SYMPTOM/WARNING: The oil pressure warning light first appeared in October 2026 and comes on intermittently when the engine is warm and the car is stopped or idling, then goes off once moving. It is becoming more frequent. No other lamps, messages, noises, or leaks. The engine runs quietly, confirmed by Kia repair shop. No crash, fire, or injury. SAFETY RISK: I cannot tell whether the sensor is faulty or oil pressure is truly low. If pressure is low, the engine could be damaged or fail while driving in traffic. If the sensor is faulty, the light is unreliable. CONFIRMATION: Dipstick level has been normal. Oil was changed 06/13/2026 and 10/06/2026; the light lessened, then returned. A Kia dealer inspected the car and recommended replacing the sending unit, quoted at $3,060.72 since the intake manifold must be removed. The dealer has NOT measured oil pressure and says it can only do so during that repair. An independent shop has…”
“The vehicle harness is burned and under recall sc206 for HECU fuses that was allegedly repaired which should have required a check of the harness connections . part number 91223f6632 is for the wire harness during engine replacement for campaign wty039 I was told the harness was melted and needed replacing , dealer put the car back together and told me we had to wrap up the work and return rental and get my car knowing it is a fire hazard I was in contact with warranty company for escalation who would not cover the recall part according to the dealer , I am still in escalations with Kia I have been left with no vehicle .engine repair was completed via dealer ,but they have reinstalled the broken harness and told me the car is ready for pick up. I am a disabled woman with small children and do not want to burn up in a fire was advised to report to dmv and nhtsa”
“I have and am the original owner of a Kia Cadenza 2017 with the 3.3L Lambda engine (same engine as the Sorento lawsuit). The vehicle is currently at the dealership getting repaired due to carbon buildup causing the fuel injectors to malfunction( despite of consistently being on top of maintenance and oil changes).I have read online of lots of users with failed engines due to carbon buildup in these engines. The warning lights I got were p0171,p0174, and p0191, and am worried that after the repair the engine will eventually fail due to the buildup as the main issue isn’t properly being addressed. The issue occurred about 300 miles ago where the dealership erased it. Then told the vehicle did not have any issues. Brought it back to the Kia dealership where they finally gave a proper diagnosis after being told nothing was wrong with car. I am concerned as there are lots of owners online experiencing the same issues with their Kia cadenzas and nothing done about it. Took the vehicle in after it stalled in traffic, but, as seen, the repair cost is high and a temporary band aid.”
Towing, payload and dimensions aren’t in the EPA or NHTSA data, so we don’t list them.
| Version | City | Hwy | Comb. | Fuel / yr | CO₂ g/mi |
|---|---|---|---|---|---|
| Cadenza Auto (S8), 6 cyl, 3.3 L · Front-Wheel Drive | 20 | 28 | 23 | $2,800 | 384 |
| Item | Miles | Time | Note |
|---|---|---|---|
| Engine oil & filter | 5,000–10,000 mi | 6–12 months | Follow the oil-life monitor if fitted |
| Tire rotation | 5,000–7,500 mi | Every oil change | Check pressure monthly |
| Engine air filter | 15,000–30,000 mi | 1–2 years | Sooner in dusty areas |
| Cabin air filter | 15,000–25,000 mi | 1–2 years | |
| Brake fluid | — | 2–3 years | Absorbs moisture over time |
| Coolant | 60,000–100,000 mi | 5–10 years | Long-life coolants last longer |
| Spark plugs | 60,000–100,000 mi | — | Iridium/platinum plugs at the long end |
| 12V battery | — | 3–5 years | Heat shortens battery life |
2 safety recalls as of Oct 29, 2026, according to NHTSA. Recall repairs are free at a dealer. Check your VIN to see whether your car is included and whether the repair was done.
Owners filed 33 complaints with NHTSA. The most-cited components are engine (12), electrical system (6), fuel/propulsion system (5). Complaints are unverified owner reports and aren't adjusted for how many cars were sold.
The EPA rates the 2017 Kia Cadenza at 23 mpg combined, depending on engine and drivetrain (1 version rated).