Front brake pad and rotor replacement can restore worn friction surfaces on a 2011–2014 Hyundai Sonata 2.4L non-hybrid with 300 mm front rotors. Squealing, metal-to-metal grinding, brake pulsation or pulling should trigger inspection first. No dedicated OBD-II code proves that these pads or rotors are worn. ABS warnings, a soft pedal and overheating can indicate faults that this kit will not repair.
The procedure below covers the conventional front brake system on that Sonata application. The same product is cataloged for selected Kia Optima and hybrid applications, detailed in the fitment table. Hybrid brake-system preparation and the later Sonata generation are outside this procedure; a parts match does not establish an identical service method.
Requires careful lifting, fastener identification and precision inspection.
Both front wheels; corrosion or screw extraction adds time.
Front axle kit budget; not a live retail quote.
Featured 300 mm front brake kit
A-Premium front vented brake rotors and ceramic pads
Part: APBRPR443 · ASIN: B0B5KYM5C3
The selected package is two front rotors and four ceramic pads, with installation hardware and high-temperature lubricant listed by the seller. The rotors have five wheel-bolt holes and a 300 mm (11.81-inch) outside diameter. The listing identifies a 26.42 mm discard thickness and includes pad wear indicators. Calipers, hoses and rear brakes are not part of this six-main-piece set.
Use the metric specification and actual part markings when comparing rotors. A 300 mm disc is not interchangeable with a larger brake package merely because its bolt holes align.
Compatibility and important restrictions
| Vehicle | Years | Engine / trim restriction | Selection check |
|---|---|---|---|
| Hyundai Sonata | 2011–2014 | Listing covers these years; this procedure is limited to 2.4L non-hybrid with matching 300 mm front brakes. | Confirm engine, brake package and original dimensions. |
| Hyundai Sonata | 2015 | Hybrid / Hybrid Limited only. | Catalog fitment only; hybrid service procedure required. |
| Kia Optima | 2011–2014 | 2.4L four-cylinder only. | Match 300 mm front brake arrangement; use Kia-specific service information. |
| Kia Optima | 2015 | EX, Hybrid LX, LX, SX, Hybrid EX as listed. | Confirm engine and 300 mm package; trim alone is insufficient. |
| Kia Optima | 2016 | Hybrid / Hybrid EX only. | Catalog fitment only; not all 2016 Optima models. |
Check VIN, engine, trim and measured rotor diameter before purchase, especially on an SX or turbo-equipped car. The vehicle must already use the matching 300 mm brake arrangement. Do not resize its brakes by substituting this kit. The rotor reference 980460 and pad reference P-1444 are comparison aids, not a substitute for the application check.
What to inspect before replacing parts
Begin with all four front pads, including the inner pads hidden behind the discs. A large inner-versus-outer wear difference calls for slide and piston inspection. Check for cracked, deeply scored or heat-damaged discs, then measure thickness and runout. Replacing the friction parts without correcting binding can quickly damage the replacements.
- Squeal at light braking: inspect the wear indicators, shims, pad seating and surface condition.
- Grinding: stop road use and inspect for backing-plate contact or trapped debris.
- Pedal pulsation: investigate thickness variation, rotor runout, hub cleanliness and wheel-bearing condition.
- Pulling or one hot wheel: investigate caliper movement and hose condition rather than assuming both rotors are the cause.
- Soft or sinking pedal: treat as a hydraulic diagnosis. Pads and rotors cannot seal a leak or remove air.
A scan tool can help diagnose an ABS warning but cannot measure rotor thickness. Likewise, a normal warning-light check does not prove the friction parts are healthy. Match the test to the symptom.
Tools and supplies
The 14, 17 and 21 mm sizes below are shown in the Sonata repair demonstration. Previous replacement hardware may differ. The small rotor screws need an inch-pound tool and matching bit; the larger brake bolts use the foot-pound wrench.
| Tool or Supply | Exact Product | Product Link | Purpose and Selection Check |
|---|---|---|---|
| Floor jack | ARCAN A20003, 3-ton low-profile steel jack | View floor jack | Lift at Hyundai’s designated point and check vehicle load, saddle stability and clearance. A jack alone is not a service support. |
| Safety stands | BIG RED T43002A, double-locking 3-ton pair | View safety stands | Use a matched pair on level concrete at approved support points. Engage both locks and observe the pair rating. |
| Wheel chocks | Fasmov solid-rubber chocks, two-pack with handles | View wheel chocks | Chock a rear tire ahead and behind before lifting the front. |
| Sockets, ratchet and breaker bar | TEKTON SKT15311, 3/8-inch-drive 6-point set, 6–24 mm metric plus SAE | View sockets, ratchet and breaker bar | The Sonata demonstration uses 14 mm caliper bolts, 17 mm bracket bolts and 21 mm wheel nuts. This set supplies these sizes and a ratchet; hand use only. |
| Torque wrench | TEKTON TRQ51402, 3/8-inch drive, 10–100 ft-lb | View torque wrench | Covers the guide-bolt, bracket and wheel-nut ranges below. It is too large for the small rotor-retaining screws. |
| Piston retraction | Lisle 25750 dual-piston brake pad spreader | View piston retraction | Use a securely seated old pad to distribute load across the piston face. The conventional front piston presses straight inward; this is not a rear parking-brake rewind tool. |
| Caliper support | Lisle 48020 brake caliper hanger set | View caliper support | Hang the caliper securely without twisting or loading its connected hose. |
| Brake cleaner | CRC Brakleen 05084 non-chlorinated low-VOC cleaner, 14 oz | View brake cleaner | Follow rotor and cleaner instructions. Use ventilation and keep away from ignition sources; check local availability. |
| Eye protection | DEWALT DPG82 Concealer safety goggles, one pair | View eye protection | Use appropriate eye protection and the cleaner’s specified chemical-resistant gloves. |
| Fluid removal, conditional | OEMTOOLS 25572, 500 cc extractor with two extension tubes | View fluid removal, conditional | Use new or dedicated brake-fluid-only equipment if the reservoir level rises excessively. Never reuse an oil-contaminated pump. |
| Counterholding wrench | Metric open-end wrench matching the pin flats; 14 mm wrench for restricted caliper-bolt access | Select to the stated specification | Select to the installed hardware. The pin flats may differ from the bolt-head size; prevent boot damage. |
| Rotor measuring tools | Deep-throat micrometer spanning 26–28 mm, plus precision indicator and rigid mount | Select to the stated specification | The new-disc runout limit is 0.025 mm, and thickness variation must be below 0.005 mm. Choose instruments accurate enough to resolve those values; ordinary 0.01 mm calipers cannot verify thickness variation. |
| Cleaning and protection | Disposable towels, runoff tray, non-damaging hub-cleaning tool and chemical-resistant gloves | Select to the stated specification | Choose gloves for the cleaner’s safety data and your size. Contain dust with wet wiping; no compressed air or household vacuum. |
| Pad hardware and shim grease | Correct Sonata shims and retainers; rubber-compatible brake lubricant approved for the installed caliper | Select to the stated specification | Match the supplied hardware to the old arrangement. Use grease only at the pad or guide contact points permitted by its instructions; keep friction surfaces dry. |
| Rotor screw torque driver | Wheeler 553556 manual F.A.T. wrench, 10–65 in-lb | View rotor screw torque driver | Covers the 43–51 in-lb retaining-screw range. Requires a separately obtained 1/4-inch-hex Phillips bit matching the screw; the listed included bits do not include that Phillips bit. |
| Retaining-screw removal, conditional | TEKTON 2905 manual impact screwdriver set, seven pieces | View retaining-screw removal, conditional | For stuck screws, with a properly fitting supplied Phillips bit and suitable hammer. Use only for loosening; do not strike the torque driver. Check seller availability. |
| Bit and striking tool | Correct-size 1/4-inch-hex Phillips bit for the torque driver; suitable hammer for the manual impact tool | Select to the stated specification | Choose an exact, fully seated screw-head fit before applying force. The impact tool and torque driver may use different bit shank sizes. |
Repair budget
| Expense | Planning estimate | Assumption |
|---|---|---|
| Front rotor/pad set | $100–$220 | Shopping allowance, not a current listing price. |
| Consumables / minor hardware | $20–$60 | No caliper, hose or hub repairs included. |
| Tools already owned | $0 additional | Only if serviceable and suitable. |
| Tools from scratch | $250–$650+ | Reusable lifting, torque and inspection equipment. |
| DIY total, existing tools | $120–$280 | Both front wheels; tax and unexpected repairs excluded. |
| Shop labor | $180–$400 | Assumed 1.5–2.5 hours at $120–$160/hour. |
| Shop total | $350–$750 | Allowance for shop-supplied parts, labor and consumables. |
Allow additional time for seized retaining screws. A shop quote should distinguish routine pads/rotors from broken fastener extraction, caliper replacement or hydraulic service. These estimates assume both front wheels and no additional failed components.
Specifications for the conventional 2011–2014 Sonata front brake
| Item | Specification | Use |
|---|---|---|
| Caliper bracket to knuckle | 78.5–98.1 N·m (57.9–72.3 ft-lb) | Conventional YF front bracket. |
| Guide-rod bolts | 21.6–31.4 N·m (15.9–23.1 ft-lb) | Do not loosen other caliper-body bolts. |
| Wheel nuts | 88.3–107.9 N·m (65.1–79.6 ft-lb) | Original wheel arrangement; star pattern. |
| Rotor-retaining screws | 4.9–5.8 N·m (about 43–51 in-lb) | Small screws; inch-pound torque control. |
| Rotor thickness | 28 mm new; factory service limit 26.4 mm | Featured kit lists 26.42 mm discard; observe its marked limit. |
| Thickness variation | Less than 0.005 mm (0.0002 in.) | At least eight evenly spaced measurements 5 mm from edge. |
| New-disc runout | 0.025 mm (0.00098 in.) or less | Indicator about 5 mm from outer circumference. |
| Pad lining service limit | 2.0 mm (0.0787 in.) | Friction lining, not total pad assembly thickness. |
The factory values are ranges; select an appropriate setting within the applicable range using a calibrated tool. Keep inch-pounds and foot-pounds separate. Observe the replacement disc’s marked discard thickness when it is more conservative than the original specification.
Step-by-step replacement
1. Make the vehicle stable
Park on level concrete, shut down the engine, secure the key and let the brakes cool. Apply the parking brake and chock the rear wheels. Crack the front wheel nuts loose before lifting. Raise and support the vehicle at Hyundai’s designated points with suitable equipment, then verify stability and remove a wheel. Work on one side at a time while replacing the complete axle set.
2. Identify the fasteners and inspect the hose
Locate the guide-rod bolts and bracket-to-knuckle bolts before turning anything. Do not loosen the caliper’s other body bolts by mistake. Inspect the hose, boots, pad arrangement and clips. Record where the wear indicator and shims sit. Keep anyone else from pressing the pedal during disassembly.
3. Remove the caliper without opening the hydraulics
Undo the guide bolts and support the caliper with a hanger. Counterhold the guide as needed with the correct wrench, protecting its boot. Keep the hose connected and avoid twists, sharp bends or tension. Remove the pads, shims and retainers, then remove the bracket bolts while supporting the bracket. Routine friction replacement does not require disconnecting the banjo fitting.
4. Release the rotor-retaining screws
Seat the correct Phillips bit fully before applying force. A manual impact tool can help release stuck screws; select its loosening direction and follow its instructions. Stop if the head begins to strip or the screw breaks. Correct extraction must leave a flat, undamaged mounting face. Do not trap broken screw material behind the replacement rotor.
5. Clean and inspect the hub
Remove the old rotor without damaging the hub, studs, hose or sensor wiring. Safely remove dust, then clean corrosion from the mounting face without gouging it. Check bearing movement and hub damage. A new rotor cannot sit squarely over rust scale or a raised broken fastener. Keep the wheel studs and braking surfaces free of lubricant.
6. Install and measure the replacement disc
Compare the old and new rotor geometry, including diameter, thickness, hat offset and center opening. Follow the manufacturer’s instructions for removing shipping oil or preserving any intended coating. Seat the disc and refit sound retaining screws to 4.9–5.8 N·m. Secure the disc correctly for measurement; measure runout about 5 mm from its outer edge. The new-disc limit is 0.025 mm. Correct hub seating or other causes before continuing.
7. Service supports and fit the new pads
Inspect guides, boots and pad supports. Remove corrosion under the clips without enlarging or damaging their seats; replace unserviceable parts. Use lubricant compatible with the caliper’s rubber only at permitted guide/contact locations. Install the bracket and torque its bolts within 78.5–98.1 N·m. Install the matching retainers, shims and pads in the correct orientation. Pads should move as designed without being hammered into place.
8. Retract the piston and close the caliper
Monitor the master-cylinder reservoir while pushing the piston straight inward with a spreader and an old pad covering its face. Do not hammer or lever directly on the piston. Use only new or dedicated brake-fluid equipment if excess fluid must be removed to prevent overflow. Stop if retraction is abnormally difficult. Refit the caliper with its hose and boots correctly positioned and torque the guide bolts within 21.6–31.4 N·m.
9. Complete the opposite side and final checks
Repeat on the other front wheel. Reinstall wheels with hand-started nuts, lower safely and torque them evenly in a star pattern within 88.3–107.9 N·m. Pump the brake pedal until firm before moving. Confirm fluid level, cap security, normal assisted pedal behavior and no leaks. A soft or sinking pedal, warning light or binding wheel requires correction before driving.
10. Test cautiously and follow bedding instructions
After stationary checks pass, test at walking speed in a clear area. Stop immediately for pulling, unusual sound, drag or inadequate braking. Follow the supplied pad/rotor bedding instructions. Do not improvise aggressive public-road stops or assume an abnormal smell and heat are harmless break-in.
Repair demonstration
1A Auto’s 2011–2014 Sonata front-brake video shows the fastener access and retaining screws. It uses different parts and demonstrates corrosion problems; do not copy a shortcut that conflicts with your vehicle or replacement hardware instructions.
Common mistakes
- Buying a 300 mm kit for a larger brake package.
- Using this conventional procedure for a hybrid without its required service preparation.
- Confusing guide bolts with bracket or caliper-body bolts.
- Using a large foot-pound wrench on the small retaining screws.
- Leaving rust or broken screw material behind the disc.
- Using the supplied high-temperature grease on rubber without confirming compatibility.
- Driving before a firm pedal and correct wheel torque are established.
Frequently asked questions
Will this fit a 2015 Sonata?
The listing names only the 2015 Hybrid and Hybrid Limited for that year. Do not treat it as a kit for every 2015 Sonata, and do not apply this non-hybrid procedure to those cars.
Does every Optima SX use this size?
No universal claim should be made from the trim name. The catalog includes selected SX fitment, but the brake package and diameter must match. Verify the specific car before ordering.
Can a 0.01 mm digital caliper check thickness variation?
It cannot resolve a 0.005 mm limit reliably. Use appropriate precision measuring equipment or have a brake shop perform that inspection.
Do I need to bleed after changing pads?
Not normally when the conventional hydraulic circuit remains sealed. Opening a fitting, introducing air or discovering a leak requires the correct additional service. A persistent soft pedal is never a normal finishing step.
Should I replace a sticking caliper at the same time?
Diagnose it first. If it cannot operate correctly after proper service, repair or replace it using the applicable hydraulic procedure. Installing fresh pads over an unresolved fault is not a complete repair.
Sources and further reading
- A-Premium APBRPR443 catalog — identity, dimensions and applications.
- Matching ASIN’s detailed product information — trim restrictions and package contents.
- Hyundai Sonata YF front-disc service instructions, reproduced factory manual.
- Hyundai front-hub procedure — disc-retaining screw torque and supported caliper handling.
- 1A Auto front-brake demonstration.
- EPA brake-dust precautions.