2015 Kia Forte Problems: 1 Issues Every Owner Should Know
2015 model year · 445+ owner reports · Updated April 2026
According to Au7o's analysis of 445+ owner reports, the 2015 Kia Forte has 1 documented known issues, with 1 rated critical. The most serious is Nu 2.0L GDI Engine Knocking and Oil Consumption ($0-$5,500 repair). The most commonly reported issue is Nu 2.0L GDI Engine Knocking and Oil Consumption with 445 owner reports. Across all issues, repair costs range from $0 to $5,500. DIY maintenance guides at au7o.io.
All 1 Known Issues
On the 2014-2018 Kia Forte 2.0L Nu GDI, 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
- UpgradeHigh-quality synthetic oil helps reduce consumption and protect worn engines (Mobil 1 Extended Performance Full Synthetic Motor Oil)
- UpgradePremium oil filter ensures proper filtration with high-mileage engines (Wix Oil Filter)