⚙️ 2018 Hyundai Ioniq PHEV — Normal Maintenance Schedule
📄 Source PDF — Original Hyundai owner’s manual excerpt for reference.
The following maintenance services must be performed to ensure good emission control and performance. Keep receipts for all vehicle emission services to protect your warranty.
Where both mileage and time are shown, the frequency of service is determined by whichever occurs first.
Key:
I= Inspect and if necessary, adjust, correct, clean or replace.R= Replace or change.
Every Visit (7,500 miles / 12 months)
| Item | Action |
|---|---|
| HSG belt ^1^ | Inspect. Replace at 67,500 mi (48 months). |
| Engine oil & oil filter | R — Replace |
| Fuel additives ^2^ | Add fuel additive |
| Rotate tires | Rotate |
| Climate control air filter | R — Replace |
| Vacuum hose | I — Inspect |
| Engine clutch actuator fluid | Inspect every 7,500 mi; replace every 22,500 mi |
Scheduled Items by Interval
| Interval (miles / months) | Item | Action |
|---|---|---|
| 22,500 / 36 | Air cleaner filter | R — Replace |
| 22,500 / 36 | Engine clutch actuator fluid | R — Replace |
| 30,000 / 24 | Exhaust pipe & muffler | I — Inspect |
| 30,000 / 24 | Fuel tank air filter ^3^ | I — Inspect |
| 30,000 / 24 | Fuel filter ^3^ | I — Inspect |
| 30,000 / 24 | Parking brake | I — Inspect |
| 30,000 / 24 | Brake fluid | I — Inspect |
| 60,000 / 48 | Dual clutch transmission fluid | I — Inspect |
| 60,000 / 48 | Vapor hose, fuel filler cap & fuel tank | I — Inspect |
| 60,000 / 48 | Fuel lines, hoses & connections | I — Inspect |
| 67,500 / 48 | HSG belt | R — Replace |
| 97,500 / N/A | Spark plugs | R — Replace |
| 120,000 / 120 | Engine coolant / Inverter coolant | R — First replacement at 120,000 mi or 10 years |
| +30,000 / +24 | Engine coolant / Inverter coolant | R — Every 30,000 mi or 24 months after first replacement |
Inspect Every Visit (7,500 miles / 12 months)
These items are inspected at every regular interval:
- Battery condition
- Brake lines, hoses & connections
- Engine clutch actuator hoses & lines
- Disc brakes & pads
- Steering gear rack, linkage & boots
- Driveshaft & boots
- Suspension mounting bolts
- Air conditioner refrigerant
- Air conditioner compressor
Footnotes
^1^ HSG belt: Inspect for evidence of cuts, cracks, excessive wear or oil saturation and replace if necessary. If drive belt noise occurs, readjust drive belt tension before replacing.
^2^ Fuel additives: If TOP TIER Detergent Gasoline is not available, one bottle of additive is recommended. Additives are available from your authorized HYUNDAI dealer along with information on how to use them. Do not mix other additives.
^3^ Fuel filter & Fuel tank air filter: Considered maintenance-free but periodic inspection is recommended based on fuel quality. If there are important safety matters like fuel flow restriction, surging, loss of power, or hard starting, replace the fuel filter immediately regardless of maintenance schedule and consult an authorized HYUNDAI dealer.
Quick Reference — Next Milestones
| Mileage | Due Items |
|---|---|
| 7,500 | Oil + filter, rotate tires, cabin filter, fuel additive, inspections |
| 15,000 | Oil + filter, rotate tires, cabin filter, fuel additive, inspections |
| 22,500 | Oil + filter, rotate tires, cabin filter, fuel additive, replace air cleaner, replace clutch actuator fluid |
| 30,000 | Oil + filter, rotate tires, cabin filter, fuel additive, inspect fuel system + parking brake + brake fluid + exhaust |
| 37,500 | Oil + filter, rotate tires, cabin filter, fuel additive, inspections |
| 45,000 | Oil + filter, rotate tires, cabin filter, fuel additive, replace air cleaner, inspections |
| 52,500 | Oil + filter, rotate tires, cabin filter, fuel additive, inspections |
| 60,000 | Oil + filter, rotate tires, cabin filter, fuel additive, inspect DCT fluid + vapor hose + fuel lines |
| 67,500 | Oil + filter, rotate tires, cabin filter, fuel additive, replace air cleaner, replace HSG belt |
| 75,000 | Oil + filter, rotate tires, cabin filter, fuel additive, inspections |
| 90,000 | Replace air cleaner |
| 97,500 | Replace spark plugs |
| 120,000 | First replacement: engine coolant + inverter coolant |