2018 Hyundai Sonata Plug-in Hybrid: Recalls, Problems & MPG
Here are the deets on the 2018 Hyundai Sonata Plug-in Hybrid: 1 recall, 0 owner complaints and up to 39 mpg combined.

Recalls
1 vehicle recall from the manufacturer. Repairs are free. Check your VIN to see if one is still open on your car.
Hybrid system Vehicle recall #18V166000 · 2018 · 2,840 vehicles
What's wrong: These vehicles are equipped with a voltage protection device (vpd), designed to protect the high voltage battery module, that May activate inadvertently.
Why it matters: If the vpd activates while the vehicle is being operated in electric vehicle (ev) mode, there May be a loss of power, increasing the risk of a crash.
The fix: Hyundai will notify owners, and dealers will remove the vpd switch and install a new battery management system (bms) that contains an overvoltage protection device (opd). The recall is expected to begin May 2018.
Most-reported problems
No owner complaints have been filed with NHTSA for the 2018 Hyundai Sonata Plug-in Hybrid so far.
Engines & fuel economy (EPA)
| Engine | Transmission | Drive | City | Hwy | Comb. | Fuel |
|---|---|---|---|---|---|---|
| 2.0 L 4-cyl hybrid | Automatic (AM6) | Front-Wheel Drive | 37 | 42 | 39 | Regular Gas and Electricity |
Want the full repair deets? Get the factory manual.
Recall and complaint data tells you what goes wrong. A service manual tells you how to fix it: torque specs, wiring diagrams, fluid capacities and step-by-step procedures for the 2018 Hyundai Sonata Plug-in Hybrid.
Closest thing to the factory manual for most years. Pay once, keep it.
Most $25–$78, one-timePro-shop repair procedures, wiring diagrams and TSBs for your exact car.
From $19.99/mo · $39.99/yrOEM procedures, specs and recall/TSB info, the same source many shops use.
From $19.99/mo · $59.99/yrStep-by-step photos written from a real teardown. Great for first-timers.
Books ~$30–$40 · AllAccess $34.99/moHeads up: we may earn a commission if you buy through these links, at no extra cost to you. Prices checked 2026-10 and can change. We never host or link to pirated manuals. Disclosure
FAQ
Does the 2018 Hyundai Sonata Plug-in Hybrid have any recalls?
Yes. NHTSA lists 1 vehicle recall for the 2018 Hyundai Sonata Plug-in Hybrid. Recall repairs are free at any dealer, no matter how old the car is. Check your VIN at nhtsa.gov/recalls.
What gas mileage does the 2018 Hyundai Sonata Plug-in Hybrid get?
EPA ratings run up to 39 mpg combined (2.0 L, Automatic (AM6)), across 1 engine and transmission combos.
Where can I get a 2018 Hyundai Sonata Plug-in Hybrid repair manual?
eManualOnline sells downloadable manuals, Mitchell 1 DIY and ALLDATAdiy sell online access to factory repair data, and Haynes sells printed guides and online access. Pick a download if you want to keep it, or a subscription for wiring diagrams and TSBs.