Frequently Asked Questions

Why is a battery important for a 2018 Hyundai Sonata Hybrid?

• It powers the car's electrical systems and supports the hybrid drive's electric assist for fuel efficiency and smooth starts.
• A healthy battery helps maintain 40 MPG city / 46 MPG highway performance for the 2018 Hyundai Sonata Hybrid and protects other components from undue stress.
• Our certified technicians at Larry H. Miller Hyundai Peoria inspect both the 12V and high-voltage systems to extend vehicle life and avoid unexpected downtime.
• We offer service financing so you can get repairs now and pay later; to schedule service call or book online.

How long does a battery replacement take?

• 12V battery swaps are frequently completed in under an hour thanks to streamlined parts access and trained technicians.
• High-voltage hybrid pack servicing or replacement can take longer—commonly a few hours to a full day—because of safety checks and diagnostic validation.
• We prioritize quick turnaround with transparent time estimates and updates so you know when to expect your vehicle.
• To reserve a time that fits your day, schedule appointment online; review current service specials before you come in.

How much does a battery cost for a 2018 Hyundai Sonata Hybrid?

• Costs vary by battery type: a 12V replacement is typically far less than a high-voltage hybrid pack replacement.
• Larry H. Miller Hyundai Peoria often provides more competitive pricing than independent shops while delivering factory-level expertise—giving immediate savings at service and long-term value through OEM parts and correct installation.
• We also offer service financing, and our advisors will review warranty coverage and any available discounts or service specials to lower your out-of-pocket cost.

How often should you replace the battery?

• 12V batteries commonly last 3–6 years depending on climate and driving habits; hybrid high-voltage packs are designed for longer life but should be monitored for performance changes.
• Regular maintenance inspections at Larry H. Miller Hyundai Peoria catch early signs of wear, protecting long-term reliability and fuel economy.
• Warranty-covered repairs must be performed at a certified dealership to remain valid—our factory-trained technicians ensure proper documentation and installation.

What type of battery is in the 2018 Hyundai Sonata Hybrid?

• The vehicle uses two battery systems: a 12V auxiliary battery for standard electrical loads and a high-voltage hybrid battery pack for electric propulsion support.
• Depending on build and market, hybrid packs can vary in chemistry; our service team will identify the correct chemistry and replacement option during inspection.
• We recommend having a certified technician verify the exact type; to schedule service or review available service specials, contact us.

What size battery is in the 2018 Hyundai Sonata Hybrid?

• Hybrid battery packs are measured in kilowatt-hours (typically around 1.5–2.0 kWh for midsize hybrids) while the 12V battery has a manufacturer-specified group size and capacity.
• Exact 12V group size and hybrid pack specs are verified by our technicians to ensure the correct OEM replacement and fitment.
• Choose Larry H. Miller Hyundai Peoria for accurate sizing, OEM parts, and installation warranties—book to schedule service today.