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Hyundai

Ioniq 5 (2022-present)

BEV · Battery Electric653V system
5

Wait

minutes

after 12V cut before HV contact

Do not touch HV components until wait time has passed

FRONT

12V1

MID

HV pack

2

REAR

HV pack zone12V batteryHV disable loop / service plug
  • 1 — 12V auxiliary battery — left side of the motor room (front). Disconnect the (−) terminal early in the disable sequence.
  • 2 — High Voltage Cut-off Switch — in the PE room under the junction-block upper cover. Power OFF → disconnect 12V (−) → remove junction-block cover → disconnect cut-off switch. Wait 5 min for capacitor discharge. Verify position on-vehicle.

Schematic zones only — front/mid/rear are approximate. Verify exact locations against the OEM Emergency Response Guide.

First 10 minutes — pre-flight

Before you touch the vehicle. Run this once for every inbound EV or hybrid.

  1. Park downwind, on level ground

    If the pack is in thermal runaway it will vent flammable + toxic gas. Stay upwind. Block wheels.

  2. PPE on: HV-rated gloves, safety glasses, no jewelry

    Class 0 (1000V) rubber insulating gloves with leather over-protectors are the floor for any HV work.

  3. Walk-around: damage scan + signs of pack compromise

    Coolant pooling, white smoke/vapor, hissing, bulging panels, exposed orange cables, or chemical smell = stop. Treat as live and call OEM hotline.

  4. Confirm the vehicle is this card (year, make, model)

    Pack location and disable procedure differ between generations. Use the distinguishing visual to be sure.

  5. Locate your fire suppression and first-aid kit before starting

    Water is the only effective agent on Li-ion. Dry chemical, foam, and CO₂ will not stop a runaway. Have ≥250 gallons accessible.

HV Disable

  1. Primary
    Power OFF (press P, then POWER button to OFF; keep Smart Key ≥2 m away), then disconnect the 12V auxiliary battery negative (−) terminal, then remove the junction-block upper cover in the PE (power-electric) room and disconnect the High Voltage Cut-off Switch

    High Voltage Cut-off Switch is in the PE (power-electric) room under the junction-block upper cover. The 12V auxiliary battery is disconnected first. (Hyundai ERG shows these in diagrams; confirm exact positions on-vehicle.)

Note
Per the Hyundai Ioniq 5 Emergency Response Guide. The disable sequence is: 1) Power the vehicle OFF, 2) disconnect the 12V negative terminal, 3) remove the junction-block upper cover in the PE room and disconnect the High Voltage Cut-off Switch. Do NOT cut the orange high-voltage cables. ELECTROCUTION RISK (Hyundai, verbatim): "Before engaging in any emergency response procedures, ensure the vehicle is disabled and wait 5 minutes to allow the capacitor in the high voltage system to discharge to avoid electrocution." Before disconnecting the 12V battery, remove the Smart Key at least 2 meters from the vehicle to prevent accidental restart. Confirm the READY light is OFF — if READY is illuminated the vehicle can move silently and is live. Never touch, cut, or open the high voltage battery under any circumstances.

12V battery & SRS

12V location: Left side of the electric-motor room (front), per Hyundai ERG. Disconnect the negative (−) terminal as the first electrical step of disabling.

Hyundai ERG: the 12V auxiliary battery is "located in the left side of the electric motor room." Disconnect the negative (−) terminal early in the disable sequence — once disconnected, power controls (windows, doors, tailgate) stop working, so lower windows / unlock / open the tailgate first if needed. Remove the Smart Key ≥2 m away before disconnecting.

Pack & no-cut zones

Pack location: Floor-mounted underbody, mid (under the floor, between the front and rear wheels)

Pack chemistry: Lithium-ion polymer

cable color:Orange

Do not cut:

  • Orange-jacketed HV cables (motor compartment and underside)
  • HV battery pack (under the floor, between the axles — never touch, cut, or open)
  • Power Electronic (PE) room HV components
  • SRS components (SRSCM control module, airbags, airbag gas inflators)
  • Air-conditioning line / refrigerant
  • Ultra-high-strength-steel zones (Hyundai marks these red — may be impossible to cut)

Reinforcement (UHSS):

  • Ultra-high-strength steel (Hyundai ERG "red" zones — challenging or impossible to cut)
  • High-strength steel (Hyundai ERG "blue" zones)
  • A/B-pillars and rocker/sill (typical E-GMP battery-surround structure)

Pack piercing risk: The HV battery sits under the floor between the axles, the lowest structural plane. Any underbody tool, fork-truck tine, or jack stand that pierces the pack risks an internal short and thermal runaway. Hyundai: never touch, cut, or open the HV battery under any circumstances.

Isolate damaged vehicle 50 ft from exposures.

Open NHTSA recalls (14)

Live from NHTSA. Cross-check the VIN against nhtsa.gov/recalls before work.

⚠ Critical advisories (1) — NHTSA Park-It or Park-Outside

  • PARK OUTSIDE

    25V482000 · MY 2025 · ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY

    Hyundai Motor America (Hyundai) is recalling certain 2025 IONIQ 5 vehicles. The high voltage battery system may contain an improperly tightened bus bar, which can cause a short-circuit.

    Remedy: Owners are advised to park their vehicles outside and away from structures until the recall remedy is complete. Dealers will inspect and repair the high voltage battery system, as necessary, free of charge. Owner notification letters were mailed August 25, 2025. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 280.

    Filed

Responder-relevant (11)

  • 26V068000 · MY 2025 · ELECTRICAL SYSTEM:PROPULSION SYSTEM:TRACTION BATTERY

    Hyundai Motor America (Hyundai) is recalling certain 2025-2026 IONIQ 5 and 2026 IONIQ 9 vehicles. The high voltage battery system may contain an improperly tightened bus bar, which can cause a short-circuit.

    Remedy: Dealers will inspect and tighten the bus bar retention bolts and replace the battery system assembly, as necessary, free of charge. Owner notification letters were mailed April 3, 2026. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 294. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on February 7, 2026.

    Filed

  • 26V047000 · MY 2026 · ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL

    Hyundai Motor America (Hyundai) is recalling certain 2025-2026 Tucson Hybrid, Tucson Plug-In Hybrid Electric (PHEV), 2026 IONIQ 5, Santa Cruz, Kona, Palisade, Palisade Hybrid, Santa Fe, Santa Fe Hybrid, Sonata, Sonata Hybrid, and Tucson vehicles. Due to a software error, the instrument panel display may fail. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 101, "Controls and Displays."

    Remedy: The instrument panel display software will be updated over-the-air (OTA) or by a dealer, free of charge. Owner notification letters were mailed March 24, 2026. Owners may contact Hyundai's customer service at 855-371-9460. Hyundai's number for this recall is 293. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on January 28, 2026.

    Filed

Show 2 other recalls
  • 26V314000 · MY 2025 · SUSPENSION:CRITICAL FASTENERS

    Hyundai Motor America (Hyundai) is recalling certain 2025 Ioniq 5 and 2026 Ioniq 9 vehicles. The fasteners for the rear suspension may loosen and detach, which can result in a loss of vehicle control.

  • 25V373000 · MY 2025 · EXTERIOR LIGHTING:HEADLIGHTS

    Hyundai Motor America (Hyundai) is recalling certain 2025 Hyundai IONIQ 5 vehicles. The right-side headlight may have an incorrect headlight aim label, which can result in improperly aimed headlights.…

Lift / jack points

Use standard OEM stabilization/lift points on a structural member only. Avoid placing cribbing under high-voltage cables or the underfloor battery; do not lift on or pierce the pack.

Fluid hazards

Coolant: Liquid battery + inverter coolant (color not stated by Hyundai)

Electrolyte color: Liquid lithium-salt / organic-solvent electrolyte — Hyundai ERG calls it an eye/skin/respiratory irritant; rinse with plenty of water on contact

If burning, toxic vapors:

  • Hydrogen fluoride (HF)
  • Carbon monoxide
  • Volatile organic compounds (electrolyte solvents)
  • Nickel / cobalt / manganese / lithium / copper / aluminum oxides

Firefighting

Show firefighting details — HV-battery fire: large volumes of water, "Max 10,000 liter" (Hyundai ERG). Small non-battery fires (wiring/components): ABC extinguisher OK., ~2,640 gal

Agent: HV-battery fire: large volumes of water, "Max 10,000 liter" (Hyundai ERG). Small non-battery fires (wiring/components): ABC extinguisher OK.

Estimated volume: 2,640 gal

Reignition risk: 24 hours post-fire1 source· 1×

Thermal imaging: required during monitoring

Source

Hyundai Ioniq 5 Emergency Response Guide (PDF) →

Last verified

Confirm this is your vehicle

Show distinguishing visual

Mid-size "retro-futuristic" crossover; pixelated/parametric square LED headlights and tail lights; flush pop-out door handles; clamshell hood with no badging; "IONIQ 5" on the tailgate; charge port on the rear right quarter panel

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