2018 Kia Rio Lug Nut Torque & Bolt Specs

The 2018 Kia Rio lug nut torque is 80 ft-lb (108 Nm), tightened with a 17mm 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. The wheel bolt pattern is 4x100.

Lug nut torque: 80 ft-lb (108 Nm) · Socket size: 17mm · Thread: M12x1.5 · Bolt pattern: 4x100.

This page is the OEM-referenced fastener summary for the 2018 Kia Rio. 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 Kia Rio

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 Kia Rio?

The OEM-specified lug-nut torque for the 2018 Kia Rio is 80 ft-lb (108 Nm), using a 17mm 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 Kia Rio lug nuts?

The 2018 Kia Rio uses a 17mm 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 Kia Rio 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 Kia Rio years

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

→ 2018 Kia Rio oil drain plug torque & size

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

All 54 2018 Kia Rio fastener specs

Per-bolt torque, wrench size, and thread spec for the 2018 Kia Rio, sourced from OEM service literature and verified against community shop data. Values pair imperial (ft-lb) and metric (Nm) where the manufacturer publishes both.

Wheels — 2018 Kia Rio

Wheel and lug nut spec for the 2018 Kia Rio. At the wheel hub, the lug nuts torques to 80 ft-lbs (108 N·m) (17mm drive, M12 x 1.5 thread). For the all four wheels, plan for a 21mm tool on a M12x1.5 stud; final torque is 79-94 ft-lbs (87 ft-lbs target) (lug nut).

Brakes — 2018 Kia Rio

Brake fasteners on the 2018 Kia Rio — caliper bracket, slide pins, and banjo bolt torque follow. For the front caliper, plan for a 12mm hex tool on a M10 stud; final torque is 20 ft-lb (front brake caliper slide pin).

Engine — 2018 Kia Rio

Engine bolt-by-bolt torque for the 2018 Kia Rio, including the long block, valve covers, and intake. Cylinder head bolts tightens to Step 1: 18 ft-lbs (25 N·m), Step 2: 22 ft-lbs (30 N·m), takes a 14mm driver, runs on M10 x 1.25 threads, located at the cylinder head. The flywheel bolts uses a 14mm drive on a M10 x 1.25 thread, torqued to 57.5 ft-lbs (78 N·m) at the crankshaft and bearings. At the oil system, the oil drain plug torques to 32.5 ft-lbs (44 N·m) (21mm drive, M14 x 1.5 thread). For the oil system, plan for a 10mm tool on a M6 x 1.0 stud; final torque is 8.5 ft-lbs (11.5 N·m) (oil pan bolts). Intake manifold bolts tightens to 13 ft-lbs (17.5 N·m), takes a 13mm driver, runs on M8 x 1.25 threads, located at the intake and exhaust. The valve cover bolts uses a 10mm drive on a M6 x 1.0 thread, torqued to 5.5 ft-lbs (7.5 N·m) at the cylinder head. At the crankshaft and bearings, the main bearing bolts torques to 64.5 ft-lbs (87.5 N·m) (17mm drive, M12 x 1.5 thread). For the intake and exhaust, plan for a 13mm tool on a M8 x 1.25 stud; final torque is 24.5 ft-lbs (33 N·m) (exhaust manifold bolts). Valve cover bolt tightens to 7-10 ft-lbs, runs on M6x1.0 threads. The spark plug is a M14x1.25 thread, torqued to 13-17 ft-lbs. The alternator mounting bolt torques to 30-40 ft-lbs (M10x1.25 thread). For the timing system, plan for a 13mm tool on a M8 x 1.25 stud; final torque is 18.5 ft-lbs (25 N·m) (timing belt/chain tensioner bolt). Camshaft sprocket bolt tightens to 39 ft-lbs (53 N·m), takes a 14mm driver, runs on M10 x 1.25 threads, located at the timing system.

Drivetrain — 2018 Kia Rio

Drivetrain and driveline fasteners for the 2018 Kia Rio — axle, transmission, and differential plugs. The axle nut front is a M24x1.5 thread, torqued to 170-200 ft-lbs. At the front hub, the front axle hub nut torques to 185 ft-lb (32mm hex drive, M24x1.5 thread). plan for the right driver on a M24x1.5 stud; final torque is 170-200 ft-lbs (axle nut rear). Transmission mount bolt tightens to 55-70 ft-lbs, runs on M12x1.25 threads.

Suspension — 2018 Kia Rio

Suspension and chassis fastener torque for the 2018 Kia Rio — strut, control arm, and sway bar values. At the suspension and steering, the ball joint nut torques to 45 ft-lbs (61 N·m) (24mm drive, M16 x 1.5 thread). For the suspension and steering, plan for a 21mm tool on a M14 x 1.5 stud; final torque is 75 ft-lbs (102 N·m) (steering gear/rack bolts). Stabilizer bar link nut front tightens to 25-35 ft-lbs, runs on M10x1.25 threads. The rear shock absorber upper nut is a M12x1.25 thread, torqued to 35-45 ft-lbs. The front lower control arm rear bolt torques to 70-85 ft-lbs (M12x1.25 thread). plan for the right driver on a M12x1.25 stud; final torque is 70-85 ft-lbs (front lower control arm front bolt). Rear shock absorber lower bolt tightens to 85-100 ft-lbs, runs on M14x1.5 threads. The sway bar link nut uses a 17mm drive on a M12 x 1.5 thread, torqued to 35 ft-lbs (47 N·m) at the suspension and steering. At the suspension and steering, the tie rod end nut torques to 33 ft-lbs (45 N·m) (17mm drive, M12 x 1.5 thread). plan for the right driver on a M14x1.5 stud; final torque is 30-40 ft-lbs (front strut top mount nut). Strut/shock absorber mounting bolts tightens to 35 ft-lbs (47 N·m), takes a 17mm driver, runs on M12 x 1.5 threads, located at the suspension and steering. The control arm bolts uses a 21mm drive on a M14 x 1.5 thread, torqued to 75 ft-lbs (102 N·m) at the suspension and steering.

Steering — 2018 Kia Rio

Steering linkage fasteners on the 2018 Kia Rio. plan for the right driver on a M16x1.5 stud; final torque is 30-38 ft-lbs (steering wheel center bolt). Power steering pump bolt tightens to 22-30 ft-lbs, runs on M10x1.25 threads.

Body — 2018 Kia Rio

Body fasteners on the 2018 Kia Rio. Bumper mounting bolts tightens to 22 ft-lbs (30 N·m), takes a 13mm driver, runs on M8 x 1.25 threads, located at the body and frame. The hood hinge bolt is a M8x1.25 thread, torqued to 15-20 ft-lbs. At the body and frame, the fender bolts torques to 17 ft-lbs (23 N·m) (10mm drive, M6 x 1 thread). For the body and frame, plan for a 10mm tool on a M6 x 1 stud; final torque is 17 ft-lbs (23 N·m) (hood hinge bolts). Body mount bolts tightens to 45 ft-lbs (61 N·m), takes a 21mm driver, runs on M14 x 1.5 threads, located at the body and frame.

Transmission — 2018 Kia Rio

Transmission fasteners on the 2018 Kia Rio. The transmission case bolts uses a 24mm drive on a M16 x 1.5 thread, torqued to 40 ft-lbs (54 N·m) at the transmission case. At the transmission oil pan, the transmission oil pan bolts torques to 71 in-lbs (8 N·m) (14mm drive, M10 x 1.25 thread). For the torque converter, plan for a 21mm tool on a M14 x 1.5 stud; final torque is 30 ft-lbs (41 N·m) (torque converter bolts). Transmission fluid drain/fill plug tightens to 29 ft-lbs (39 N·m), takes a 17mm driver, runs on M12 x 1.5 threads, located at the transmission fluid drain and fill. The valve body bolts uses a 14mm drive on a M10 x 1.25 thread, torqued to 15 ft-lbs (20 N·m) at the valve body. At the transmission cooler lines, the transmission cooler line fittings torques to 12 ft-lbs (16 N·m) (14mm drive, M10 x 1.25 thread). For the transmission mounting, plan for a 21mm tool on a M14 x 1.5 stud; final torque is 47 ft-lbs (64 N·m) (transmission mounting bolts). Transmission drain and fill plugs tightens to 27 ft-lbs (37 N·m), takes a 17mm driver, runs on M12 x 1.5 threads, located at the transmission fluid drain and fill.

Lug Nut — 2018 Kia Rio

Lug Nut fasteners on the 2018 Kia Rio. At the wheel, the wheel lug nut torques to 80 ft-lb (108 Nm) (17mm drive, M12x1.5 thread).

Oil Drain Plug — 2018 Kia Rio

Oil Drain Plug fasteners on the 2018 Kia Rio. For the oil pan, plan for a 16mm tool on a M14x1.5 stud; final torque is 29 ft-lb (39 Nm) (engine oil drain plug).

Wheel — 2018 Kia Rio

Wheel fasteners on the 2018 Kia Rio. Wheel lug nuts tightens to 80-90 ft-lbs, takes a 17mm driver, runs on M12x1.5 threads.

Brake — 2018 Kia Rio

Brake fasteners on the 2018 Kia Rio. The rear brake caliper guide pin bolt is a M10x1.25 thread, torqued to 20-28 ft-lbs. The front brake caliper guide pin bolt torques to 22-30 ft-lbs (M10x1.25 thread). plan for the right driver on a M12x1.25 stud; final torque is 50-65 ft-lbs (rear brake caliper bracket bolt). Front brake caliper bracket bolt tightens to 55-70 ft-lbs, runs on M12x1.25 threads.

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 Kia Rio numbers above.

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