One problem related to engine knocking noise has been reported for the 2018 Hyundai Sonata. Free shipping on many items | Browse your favorite brands | affordable prices. 2018 Hyundai Sonata Pictures: View exterior photos, interior photos, 360 tours and colors. The 2018 Hyundai Sonata has 37 NHTSA complaints for the engine at 11,278 miles average. (Engine) Get the best deals on Engines & Components for 2018 Hyundai Sonata when you shop the largest online selection at eBay.com. Please also check out the statistics and reliability analysis of the 2018 Hyundai Sonata based on all problems reported for the 2018 Sonata. (Page 1 of 2) Get the best deals on Engines & Components for 2018 Hyundai Sonata when you shop the largest online selection at eBay.com. The most recently reported issues are listed below.