2017 Hyundai Elantra: engine knocking or ticking

Filed Oct 24, 2026 · Engine · UT

Vehicle Information: Year/Make/Model: 2017 Hyundai Elantra Value Edition Mileage: ~135,000 miles Engine: 2.0L Nu 4-Cylinder VIN: [XXX] Incidence Summary: Engine internal failure, metallic debris/shavings found in oil, severe knocking noise, high risk of sudden engine stall/failure while driving. Detailed Description of the Incident: While driving home, the vehicle began producing a loud, severe metallic knocking noise from the engine compartment. The engine continued running, but the noise persisted throughout the trip. Upon inspecting the vehicle, a certified mechanic removed the engine oil and discovered a significant amount of metallic debris and metal shavings inside the oil pan, indicating severe internal engine component wear (connecting rod bearing / crankshaft failure). The mechanic advised that the engine is at immediate risk of seizing or experiencing complete catastrophic failure. Safety Risk: A sudden engine failure or seizure while driving on a highway or at high speeds creates a critical safety hazard, as it can cause an immediate loss of power, loss of power steering/braking assistance, and significantly increase the risk of a crash or rear-end collision for me and surrounding traffic. Current Status: The vehicle is no longer safe to drive and has been grounded to prevent complete engine lockup or serious road accidents. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Oct 19, 2026 · Brakes · CA

My 2017 Hyundai Elantra SE 2.0L (outside Recall 157/17V063 VIN range) has suffered 7 intermittent brake failures since 06/03/2026 (~118,563 mi), involving total loss of braking power, a rock-hard pedal, and/or resistance during pedal depression. The vehicle is at Temecula Hyundai and available for inspection. SAFETY RISK: Across 7 incidents (06/03, 06/17, 06/23, 08/29, 09/19, 10/09, 10/11), the brake pedal either met strong resistance halfway down with rapid metallic ticking from the front-left/under-hood area and reduced stopping power, or became completely rock-hard with total loss of braking power for 5-10 seconds (frequently while braking downhill). On 09/19, 1-2 seconds of pedal resistance/ticking transitioned directly into a rock-hard pedal and total brake loss. On 06/03, I had to jump a curb to avoid traffic. On 06/23, 09/19, and 10/11, I had to use the emergency brake to stop. On 10/11, total brake loss approaching a stoplight forced a hard e-brake pull, locking the rear tires and spinning the car sideways in front of cross-traffic before brakes returned 8-10 seconds later. REPRODUCTION & INSPECTIONS: Inspected by Temecula Hyundai across 5 visits (96+ cumulative days in shop) and an independent shop (both verified brake pads, rotors, and calipers are good). In June 2026, a dealer technician reproduced the stiff brake pedal on a road test and replaced the brake booster under warranty (06/16), without documenting on the work order if vacuum check valve/hose or ABS HECU causes were ruled out as the root cause. Failures recurred within the same week. On 10/13, a dealer advisor confirmed a front-left growling/chirping noise on a road test, yet the dealer only suggested customer-pay brake pads (with "high confidence" it would fix the total/complete brake failures). WARNING LAMPS: Zero warning lights or codes have ever appeared before, during, or after any incident. A near-daily front-left growling and chirping noise is present (not constant during all braking).

Filed Aug 17, 2026 · Engine · 108,404 miles · OK

The contact owns a 2017 Hyundai Elantra. The contact stated that while driving 50 MPH, there was an abnormal knocking sound coming from the engine. The contact pulled over to the right side of the road, turned off and restarted the vehicle, and the vehicle operated as intended. No warning light was illuminated. An independent mechanic was contacted. The vehicle was taken to an independent mechanic where it was diagnosed and determined that the engine needed to be replaced. The engine was replaced, and the vehicle was repaired. The manufacturer was not notified of the failure and referred the contact to the BBB to report the issue. The approximate failure mileage was 108,404.

Filed Feb 12, 2026 · Engine · GA

After no previous issues, car stalled out multiple times on short drive to work. No warning lights and no subsequent diagnostic codes were reported. Upon final restart, engine started knocking severely. Upon investigation, the oil stick showed no oil in the pan. Vehicle was towed to trusted, licensed mechanic for evaluation where we were informed about the potential of a failure due to rapid oil consumption. The mechanic confirmed the engine failure to to oil loss. Vehicle had received regular, documented maintenance and fluids were checked periodically between cycles. There was no low-fluid indicator prior to the mechanical failure. Dealership-level conversations confirmed the rapid oil consumption issue for the 2017 Elantra is common, but because the vehicle VIN was not listed as part of a prior recall no assistance could be provided to repair the engine. The dealer provided a full cost quote of $9,000 to replace the engine block with a remanufactured unit.

Filed Feb 3, 2026 · Engine · MO

With no 'low oil' warning, the car's engine started may a knocking noise. Then, all kinds of warning lights started. Parked the vehicle and checked the oil the next day and there was NO OIL in the engine. This should not have been the case considering this car gets regular oil changes. Also, there was no oil spots or stains on the driveway to also indicate an oil leak. This happened to my son while driving home from work on the interstate at 10:30 at night. That is concerning.

Filed Aug 14, 2025 · Engine · OH

While driving down the road, the car lost complete power. No warning lights came on until after the car had lost power. Car struggled to start back up. I put flashers on in hopes that others would notice my disabled vehicle in the middle of the road, while it was also pouring down the rain. The vehicle was towed to my local dealership where it was confirmed that I would need a new engine. The engine had a high oil consumption issue that caused it to stale while driving. The dealership informed me either there was a rod bearing issue or a piston slap in the engine. They recommended to park the car until fixed

Filed Oct 3, 2024 · Engine · GA

The vehicle has about 136,000 miles and was driving when the engine just started knocking. There were no engine warning lights or any other indications there might be an issue. We Towed the vehicle to the dealer, and they advised that it needs a new engine. We are the original owners and maintained the vehicle with regular service and oil changes.

Filed Oct 1, 2024 · Body, Electrical · TN

Check engine light on Transmission sensor is wack Car slugs and knocks. This car also has the white paint defect! This is my first and last Hyundai, go to accelerate onto interstate but can barely get the car to go past 30mph

Filed Sep 3, 2024 · Engine · GA

The car engine is consuming too much oil causing the oil to run out of the car too soon. The car engine starts knocking & the car keeps cutting off.

Filed Aug 5, 2024 · Engine, Transmission · NC

Our Hyundai Elantra Se 2017, engine blown. Started with knocking sound and when we stopped on the side of the highway it powered down. We have been told that unfortunately so many of hyundai's vehicle engines have been super problematic within the last decade. We were stranded on vacation. Had to pay for towing twice and a rental car to get back to North Carolina because we had to get back to work. We also have had to pay to diagnose the vehicle twice. We had the issue diagnosed with an independent service center Tuffys Auto in St. Johns Florida and now it currently is at Hyundai in St. Augustine. We have been without our vehicle for over a month and with the trending problems with these engines we shouldnt have to come out of pocket to fix it. Hyundai corporate has not been helpful at all even though we have had a case manager for over a month and they havent given us any info.

Filed Mar 26, 2024 · Engine · 131,000 miles · ME

The contact owns a 2017 Hyundai Elantra. The contact stated while driving to the emergency room at approximately 50 MPH, the vehicle began to lose motive power and the contact had to pull to the side of the road. The contact stated that when the vehicle was restarted, there was a knocking noise coming from the engine. The contact continued to drive the vehicle to the emergency room, and after leaving emergency room when the vehicle was started, the knocking sound continued. The contact stated that while coming to a stop light, the oil and check engine warning lights illuminated. The contact drove to a nearby gas station where 2.5 quarts of engine oil was added to the vehicle however, the engine continued making the knocking sound. The contact discovered an unknown the federal safety agency Campaign related to the engine however, the VIN was not included. The vehicle was taken to the dealer where it was diagnosed with Low Oil Pressure, Low/No Engine Oil, Lower End Rod Block, and the dealer recommended that the engine be replaced. The vehicle was not repaired. The manufacturer was notified of the failure and a case was opened. The failure mileage was approximately 131,000.

Filed Mar 11, 2024 · Electrical, Engine · CA

When driving about a month ago my car all the sudden started making a clinking noise not so much knocking in the engine or near the engine. And then it died all the sudden at a red light out of no where. Well I put the car into park and started my car again when I accelerate the rpm takes a lot longer to catch up to the speed I'm trying to go, so it takes longer to accelerate which is dangerous because cars usually accelerate alot faster than that and I almost got rear ended twice because of it. I parked it for a few days but moved recently so I had to move the car it started and everything but the knocking, or clinking was still there. The following day I went to start my car and know it won't even start and the anti theft light comes on, on my dash board. So now my car is stuck at a motel because of it. I think it may be the crank shaft position sensor. Yes my vehicle is available for inspection upon request. No my vehicle has not gotten in any accidents. It has not been inspected by a manufacturer.