Kia Forte Problems: 4 Issues Every Owner Should Know
2014-2024 model years · Based on 1,624+ owner reports · Last updated March 2026
According to Au7o's analysis of 1,624+ owner reports, the 2014-2024 Kia Forte has 4 documented known issues, with 1 rated critical by the Au7o research team. The most serious is Nu 2.0L GDI Engine Knocking and Oil Consumption ($0-$5,500 repair). The most commonly reported issue is CVT Shudder and Hesitation Under Acceleration with 523 owner reports. Across all issues, repair costs range from $0 to $5,500. Full technical analysis and DIY maintenance guides at au7o.io.
All 4 Known Issues
The 2nd generation Forte with the Nu 2.0L GDI engine (2014-2018) can develop engine knocking and excessive oil consumption. Similar to the Theta II issues but in the Nu engine family, piston ring wear leads to oil blow-by and cylinder scoring. Kia extended warranty coverage under the engine campaign. Affected engines may consume 1+ quart of oil per 1,000 miles.
Common Symptoms
- Engine knocking at idle and under load
- Excessive oil consumption (1+ qt per 1,000 miles)
- Blue or white smoke from exhaust
- Check engine light with misfire codes
- Rough idle
How to Fix
Contact dealer for engine campaign eligibility check. Dealer will perform oil consumption test (requires multiple visits over 1,000 miles). If consumption exceeds Kia threshold (1 qt per 1,000 miles), engine replacement or piston ring replacement is performed under warranty extension. Keep all oil purchase and change receipts.
What Owners Are Using
Parts and tips from 445+ owners who fixed this issue
- TipCheck oil level every 500 miles and document with photos. The oil consumption test at the dealer requires proof of consistent monitoring
The IVT (Intelligent Variable Transmission, Kia's name for their CVT) in the 2019-2024 Forte develops a shuddering sensation during light-to-moderate acceleration, particularly from stops and at speeds between 20-45 mph. The issue is caused by the CVT chain and pulley interface wearing irregularly. Kia has released multiple software updates to improve shift mapping and reduce the shudder sensation.
Common Symptoms
- Shuddering during acceleration from stops
- Hesitation or rubber-band feel during acceleration
- Vibration felt through accelerator pedal at 20-45 mph
- Whining noise from transmission during acceleration
- RPMs fluctuate unexpectedly during steady cruise
How to Fix
Have dealer perform TCU software update (latest calibration). If shudder persists after software update, CVT fluid change with genuine Kia CVTF may help. In severe cases, CVT valve body or complete CVT replacement under powertrain warranty (10 years/100,000 miles). Kia part #45280-2F100 for CVT fluid.
What Owners Are Using
Parts and tips from 523+ owners who fixed this issue
- TipStart with the free TCU software update at the dealer - this resolves or significantly improves the shudder in about 60% of cases
- UpgradeUse only genuine Kia CVTF for fluid changes. Aftermarket CVT fluids can worsen the shudder (Kia OEM #45280-2F100)
The 3rd generation Forte (2019-2024) develops a creaking, popping, or groaning noise from the front suspension when turning the steering wheel, particularly at low speeds and over bumps. The front strut bearing and upper spring pad deteriorate prematurely. Kia issued a TSB to replace both components with updated parts. The issue is especially prevalent in colder climates.
Common Symptoms
- Creaking or groaning noise when turning steering wheel
- Popping sound over bumps from front suspension
- Noise most noticeable at low speeds and during parking
- Sound more pronounced in cold weather
- Steering feels rough when turning slowly
How to Fix
Have dealer check for Kia TSB addressing front strut bearing and upper spring pad replacement on 2019-2024 Forte. Replacement of both strut mount bearings and upper spring pads ($50-80 per side in parts). Labor is approximately 1.5-2 hours per side. Some owners combine with strut replacement for a more complete refresh.
What Owners Are Using
Parts and tips from 367+ owners who fixed this issue
- TipIf doing this repair yourself, replace strut bearings AND upper spring pads together. Doing one without the other usually results in the noise returning
The 2019-2023 Forte commonly develops condensation (fogging) inside the headlight and taillight assemblies. Water enters through degraded seals or vent tubes that become clogged. In severe cases, standing water can short out LED driver boards or corrode wiring connectors. Kia has replaced headlight assemblies under warranty for many owners, though the issue can return if the seal design is not updated.
Common Symptoms
- Visible moisture or fogging inside headlight lenses
- Condensation in taillights
- Water pooling at bottom of headlight housing
- Headlight flickering (if water reaches electronics)
- Reduced headlight brightness due to fogging
How to Fix
If under warranty, have dealer replace headlight assembly with updated seal design. Aftermarket fix: remove headlight assembly, dry thoroughly, reseal with Permatex Ultra Grey RTV silicone (#82195), and ensure vent tubes are clear. For LED taillights with condensation, replacement is usually needed ($200-400 per side).
What Owners Are Using
Parts and tips from 289+ owners who fixed this issue
- UpgradePermatex Ultra Grey RTV silicone sealant works well for resealing headlight housings as a DIY fix (Permatex #82195)
Frequently Asked Questions
What are the most common Kia Forte problems?
According to Au7o's analysis of 1,624+ owner reports, the 2014-2024 Kia Forte has 4 documented issues. The most frequently reported are: Nu 2.0L GDI Engine Knocking and Oil Consumption, CVT Shudder and Hesitation Under Acceleration, Front Strut Bearing and Upper Spring Pad Noise/Failure. Of these, 1 is rated critical and should be addressed promptly.
Is the Kia Forte reliable?
The 2014-2024 Kia Forte has 4 known issues documented across 1,624+ owner reports. 1 issue is rated critical: Nu 2.0L GDI Engine Knocking and Oil Consumption. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
How much does it cost to fix common Kia Forte problems?
Repair costs for known Kia Forte issues range from $0 to $5,500, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Nu 2.0L GDI Engine Knocking and Oil Consumption, typically costs $0-$5,500 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What year Kia Forte is the most reliable?
Reliability varies across model years of the Kia Forte. Based on owner reports, issues are most commonly reported in earlier model years. Au7o recommends checking the specific known issues for your target year before purchasing, and having a pre-purchase inspection performed by a qualified mechanic. Our known issues database covers the 2014-2024 Kia Forte with 4 documented issues from 1,624+ owner reports.
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