2018 Hyundai I30 Lug Nut Torque & Bolt Specs

The 2018 Hyundai I30 lug nut torque is 80 ft-lbs (108 Nm), tightened with a 21mm socket on M12x1.5 studs. Torque in a star pattern in two passes (snug, then final), and re-check after the first 50–100 miles of driving. Use a calibrated torque wrench — not an impact gun — for the final pass.

Lug nut torque: 80 ft-lbs (108 Nm) · Socket size: 21mm · Thread: M12x1.5.

This page is the OEM-referenced fastener summary for the 2018 Hyundai I30. Use it before any maintenance or repair job where torque values matter — brake work, wheel changes, suspension service, engine teardowns, or oil changes. Specs are pulled from manufacturer service literature, cross-checked against community data, and updated as new chassis variants become available.

Hyundai/Kia lug-nut torque is 79-88 ft-lbs on nearly all passenger models, M12x1.5 thread, 21mm socket. The Tucson, Sportage, and Santa Fe all use the same fastener spec. Hyundai's oil drain plug threads are unusually fine-pitch and strip easily — always use a torque wrench, not feel.

Common fastener categories on the 2018 Hyundai I30

Wheel / lug nut torque and thread spec (covered above)
Brake caliper bracket bolts (typically 80-130 ft-lbs) and slide/guide pins (18-35 ft-lbs)
Engine oil drain plug torque — rarely above 30 ft-lbs; always use a new crush washer
Transmission pan, valve cover, and intake manifold bolts (low torque, often 89-106 in-lbs)
Suspension control arm, sway bar, tie rod end and ball joint torque
Spark plug torque (typically 10-15 ft-lbs on aluminum heads — do not exceed)
Differential cover bolts (RWD/4WD only) and transfer case fasteners

Repair guidance for this model year

For 2018 model-year work: This era introduced widespread torque-to-yield (TTY) bolts on head, main, and crank pulley fasteners. TTY bolts stretch permanently when torqued and must not be reused — the spec calls for a fresh bolt every time. Always verify TTY status against the FSM before reassembly.

Tools you will need

Metric socket set (8mm-22mm), 6-point impact-rated
Calibrated torque wrench (10-150 ft-lbs covers most automotive jobs; add a 0-250 ft-lbs wrench for truck lug nuts)
Breaker bar (24" minimum) for initial loosening
Penetrating oil (PB Blaster or Kroil) for any fastener over 5 years old
Anti-seize on stainless or dissimilar-metal threads; thread-locker (Loctite blue) on critical reassembly

Frequently asked questions

What is the lug nut torque on a 2018 Hyundai I30?

The OEM-specified lug-nut torque for the 2018 Hyundai I30 is 80 ft-lbs (108 Nm), using a 21mm socket on M12x1.5 thread studs. Use a calibrated torque wrench in a star pattern, in two passes (50% and 100%), and re-check after 50-100 miles of driving.

What socket size do I need for the 2018 Hyundai I30 lug nuts?

The 2018 Hyundai I30 uses a 21mm socket. A 6-point impact-rated socket is recommended over a 12-point chrome socket — 12-points round off lug nuts under impact-driver use.

Are the 2018 Hyundai I30 fasteners metric or SAE?

Metric is the standard for this vehicle. Most fasteners on this vehicle are metric (M6, M8, M10, M12, M14). Bring a full metric set; SAE substitutes can round the head. Bolt-head markings are the fastest way to confirm grade and material at the bench.

Other Hyundai I30 years

Same model, different model year — fastener spec may change. Always confirm against the year for your VIN.

→ 2018 Hyundai I30 oil drain plug torque & size

→ 2018 Hyundai I30 suspension & steering torque specs (control arm, ball joint, tie rod)

All 16 2018 Hyundai I30 fastener specs

Per-bolt torque, wrench size, and thread spec for the 2018 Hyundai I30, sourced from OEM service literature and verified against community shop data. Values pair imperial (ft-lb) and metric (Nm) where the manufacturer publishes both. 1 of the 16 fastener specs on this page are independently verified against OEM service manuals and manufacturer torque data.

Wheels — 2018 Hyundai I30

Wheel and lug nut spec for the 2018 Hyundai I30. The lug nut uses a 21mm drive on a M12x1.5 thread, torqued to 80 ft-lbs (108 Nm) at the all four wheels.

Engine — 2018 Hyundai I30

Engine bolt-by-bolt torque for the 2018 Hyundai I30, including the long block, valve covers, and intake. At the cylinder head, the spark plug torques to 25 Nm (16mm drive, M14x1.25 thread). For the oil pan, plan for a 17mm tool on a M14x1.5 stud; final torque is 25 ft-lbs (34 Nm) (oil drain plug). Oil filter tightens to 12 Nm, takes a 76mm driver, runs on 3/4-16 UNF threads, located at the engine block. This figure is independently verified against OEM service data.

Suspension — 2018 Hyundai I30

Suspension and chassis fastener torque for the 2018 Hyundai I30 — strut, control arm, and sway bar values. For the knuckle, plan for a 18mm tool on a M14x1.5 stud; final torque is 147 Nm (front strut lower bolt). Front strut upper nut tightens to 50 Nm, takes a 17mm driver, runs on M12x1.5 threads, located at the strut tower. The front tie rod end nut uses a 17mm drive on a M12x1.5 thread, torqued to 45 Nm at the knuckle. At the subframe, the front lower control arm torques to 118 Nm (18mm drive, M14x1.5 thread). For the rear axle, plan for a 17mm tool on a M12x1.5 stud; final torque is 98 Nm (rear shock lower bolt).

Brake — 2018 Hyundai I30

Brake fasteners on the 2018 Hyundai I30. Front brake caliper bolt tightens to 27 Nm, takes a 17mm driver, runs on M12x1.5 threads, located at the front caliper. The rear brake caliper bracket uses a 17mm drive on a M14x1.5 thread, torqued to 69 Nm at the rear hub. At the rear caliper, the rear brake caliper bolt torques to 27 Nm (14mm drive, M10x1.25 thread). For the front hub, plan for a 17mm tool on a M14x1.5 stud; final torque is 89 Nm (front brake caliper bracket).

Wheel — 2018 Hyundai I30

Wheel fasteners on the 2018 Hyundai I30. The wheel lug nut uses a 21mm drive on a M12x1.5 thread, torqued to 80 ft-lbs (108 Nm) at the front/rear. At the front, the front axle nut torques to 200 Nm (30mm drive, M22x1.5 thread).

Transmission — 2018 Hyundai I30

Transmission fasteners on the 2018 Hyundai I30. At the trans pan, the transmission drain plug torques to 35 Nm (17mm drive, M14x1.5 thread).

New to torquing wheels? Read our How lug nut torque works — the complete guide for star-pattern sequence, re-torque intervals, and how to read a lug spec — then use the 2018 Hyundai I30 numbers above.

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