2021 Hyundai IONIQ PLUG-IN HYBRID
Problems, Recalls & Reliability Report
Quick Summary
The 2021 Hyundai IONIQ PLUG-IN HYBRID has 9 owner complaints filed with NHTSA — that's 1.0x the segment average of 9. The most common issue is speed control problems (33% of all complaints), specifically: during a highway trip that was bumper to bumper traffic at approximately 15mph, the car suddenly would not accelerate while operating on gasoline (not electric). the engine revs would increase to maximum without movement from the car (as if the car was in neutral). after checking the gear lever to m.
9
Total Complaints
0
Recalls Issued
—/5
Safety Stars
1.0x
vs Segment Avg
Known Problems(top 5 of 5)
SPEED CONTROL
3 complaints- • During a highway trip that was bumper to bumper traffic at approximately 15mph, the car suddenly would not accelerate while operating on gasoline (not electric). The engine revs would increase to maximum without movement from the car (as if the car was in neutral). After checking the gear lever to m
- • During a highway trip that was bumper to bumper traffic at approximately 15mph, the car suddenly would not accelerate while operating on gasoline (not electric). The engine revs would increase to maximum without movement from the car (as if the car was in neutral). After checking the gear lever to m
- • The "Auto Hold" feature on my Hyundai Ioniq malfunctioned, displaying a dashboard warning: "AUTO HOLD conditions not met. Press brake pedal." This message randomly appears while driving or stopping, and it deactivates the Auto Hold and Electronic Parking Brake (EPB) functions. In some cases, the car
“During a highway trip that was bumper to bumper traffic at approximately 15mph, the car suddenly would not accelerate while operating on gasoline (not electric). The engine revs would increase to maximum without movement from the car (as if the car was in neutral). After checking the gear lever to m”
— NHTSA complaint filing
Charging Cost Calculator for 2021 Hyundai IONIQ PLUG-IN HYBRID
Live EIA pricesBased on EPA fuel-economy ratings and EIA weekly retail prices (2026-07-20). Real-world cost varies with driving style, trim/engine, terrain, and traffic.
Estimated Insurance Cost for 2021 Hyundai IONIQ PLUG-IN HYBRID
How this estimate is calculated
Coverage assumed: 100/300/100 liability + comprehensive/collision, $500 deductibles. Data sources: NAIC 2024 + HLDI loss studies.
Maintenance & Warranty
Recommended Hyundai IONIQ PLUG-IN HYBRID Service Intervals
Turbo engines (1.6T, 2.0T) need premium fuel and more frequent oil (some owners service at 5,000 miles).
"Severe service" conditions (heavy towing, extreme temps, city stop-and-go) typically halve these intervals. Always consult your vehicle's owner's manual for the authoritative schedule.
Hyundai New-Vehicle Warranty Coverage
10 years/100K powertrain warranty is transferable only to first purchaser after initial owner
These are the terms for a new Hyundai. If you're buying a used 2021 IONIQ PLUG-IN HYBRID, remaining coverage is usually pro-rated from the vehicle's original in-service date. Not all coverage transfers between owners — check with a Hyundai dealer for VIN-specific remaining warranty.
EV Incentives for 2021 Hyundai IONIQ PLUG-IN HYBRID
Updated 2026-07Federal Tax Credit (Section 30D) — Expired 2025-09-30
Section 30D new clean vehicle credit ($7,500 max) expired for vehicles acquired after Sept 30, 2025 per Public Law (One Big Beautiful Bill Act). Vehicles acquired on or before that date remain eligible on the buyer's 2025 return. No federal purchase credit exists for post-9/30/2025 acquisitions.
State-Level Incentives (Still Active in 14 States)
Source: US Department of Energy Alternative Fuels Data Center + state DOR / DEQ program pages. Program details and eligibility limits change frequently — always verify with the linked source before purchase.
Estimated Repair Costs
Estimates based on average reported repair costs. Actual costs vary by location, shop, and severity.
🔍 Pre-Purchase Inspection Checklist
Based on 9 owner complaints for this specific year, here's what to check or ask about:
- ☐SPEED CONTROL: During a highway trip that was bumper to bumper traffic at approximately 15mph, the car suddenly would not accelerate while operating on gasoline (not electric). The engine revs would increase to maximum without movement from the car (as if the car was in neutral). After checking the gear lever to m
Typically appears around 50K miles. Repair cost ~$500
- ☐ELECTRICAL: The contact leased a 2021 Hyundai Ioniq Electric The contact stated that while the vehicle was parked, he attempted to open the driver’s side door using the key fob; however, the door would not open. The contact contacted Hyundai roadside assistance who assisted him in jumpstarting and recharging th
Typically appears around 50K miles. Repair cost ~$500
- ☐BRAKES: The "Auto Hold" feature on my Hyundai Ioniq malfunctioned, displaying a dashboard warning: "AUTO HOLD conditions not met. Press brake pedal." This message randomly appears while driving or stopping, and it deactivates the Auto Hold and Electronic Parking Brake (EPB) functions. In some cases, the car
Typically appears around 50K miles. Repair cost ~$500
- ☐OTHER: The "Auto Hold" feature on my Hyundai Ioniq malfunctioned, displaying a dashboard warning: "AUTO HOLD conditions not met. Press brake pedal." This message randomly appears while driving or stopping, and it deactivates the Auto Hold and Electronic Parking Brake (EPB) functions. In some cases, the car
Typically appears around 50K miles. Repair cost ~$500
- ☐General: Get a pre-purchase inspection from an independent mechanic ($100-$200)
Hyundai IONIQ PLUG-IN HYBRID — Year Comparison
How does 2021 compare to other years? Fewer complaints = more reliable.
Full years-to-avoid analysis →NHTSA Safety Rating
No NHTSA safety rating available
At a Glance
- Complaints
- 9
- Recalls
- 0
- Fire reports
- 0
- Crash reports
- 0
- Injury reports
- 0
- Segment avg
- 9
Check a Specific VIN
See recalls for YOUR 2021 Hyundai IONIQ PLUG-IN HYBRID