2005 Hyundai XG350 Problems

What owners report

Owners of this model year report two dominant themes in the sampled complaints: an airbag warning light that comes on and stays on, often traced by dealers to seat connectors or wiring, and unexpected engine revving or surging while braking or pulling away. Most airbag complaints arrive at moderate mileage, while the speed-control complaints cluster at very low mileage, often within the first few thousand miles.

1. 1
   Air bags

   Airbag warning light stays on (seat connector/wiring)

   • 63 complaints (44%)
   • median 45,000 mi at 6.3 yrs old (56 state mileage)
   • 1 mention a crash, fire or injury
   • owner-quoted repair $876 (median of 8 quotes)
   • filed 2006–2019

   Owners describe the airbag warning light coming on and staying lit, sometimes right after purchase and sometimes years later. Dealers commonly point to the connector or wiring under the driver or passenger seat, clean or reseat it, replace a wire harness or seat component, or simply reset the light. Complaints say the light often returns within days or weeks, and some owners were quoted several hundred dollars or more for diagnosis or a new harness once warranty coverage ended. Reported across a wide mileage range, from a few hundred miles on nearly new cars to over 100,000 miles, with many appearing between roughly 40,000 and 90,000 miles.

   2 related service bulletins

   What to check: With the key on, confirm the airbag light goes out after the bulb check; if it stays lit, ask for the stored code and whether the under-seat connectors or harness have been replaced. Ask whether any inflator-related advisory applies to the vehicle's VIN.

   2 excerpts from owner complaints in NHTSA records

   “Takata recall my air bag light has been illuminated now for about 10 months. My car has very low mileage (56000). This is a very concerning to me,for it is a life and death problem.with all the complaints I'm wondering when Hyundai is going to recall these cars. What are they waiting for? This makes me think twice about buying another Hyundai.”

   NHTSA complaint #10822762, filed 2016-01, 52,000 miles

   “I have a 2005 Hyundai XG350. Six months after the vehicle was purchased, the air bag light illuminated. There has been eight attempts to repair this vehicle. The dealer has replaced sensors, plugs, and wiring harness; however, the light continues to illuminate. I have all the repair invoices and diagnoses that were performed. The failure mileage was 11,000 and current mileage is about 48,000.”

   NHTSA complaint #10223834, filed 2008-04, 11,000 miles
2. 2
   Vehicle speed control

   Engine revs or surges unexpectedly while braking

   • 47 complaints (33%)
   • median 5,500 mi at 1.8 yrs old (39 state mileage)
   • 9 mention a crash, fire or injury
   • filed 2005–2018

   Owners describe engine speed climbing on its own, often when slowing for a light, stop sign, or while idling in traffic, and sometimes needing hard braking or shifting to neutral to hold the car back while the engine revs. Several also report hesitation or stumbling on light acceleration followed by a sudden jump forward. Complaints say dealers were often unable to duplicate the condition, and some were told it was normal behavior for the car. Mostly reported at very low mileage, often within the first few thousand miles and frequently when the engine is warm or after a restart.

   1 related service bulletin

   What to check: Test drive from cold and again fully warm, including repeated stops from low speed; watch the tachometer for revs rising while your foot is on the brake. Ask whether the electronic throttle system has been checked for stored codes.

   2 excerpts from owner complaints in NHTSA records

   “I was braking my car at the end of my work's driveway which enters into a t intersection. Upon reaching a slow speed of 5 MPH the car surged into the traffic which was traveling from my left and right. Braking fully had no effect on the surge and thankfully I was not hit by any left or right traveling vehicles and I just missed a vehicle crossing in front of me by an inch as it passed. …”

   NHTSA complaint #10596034, filed 2014-06, 59,000 miles

   “On three occasions over about 4-5 month period ending july 2010 I experienced sudden unintended acceleration with my 2005 Hyundai xgl350. The first 2 times I was stopped at a red light and the car started to accelerate unexpectedly. I already had the brake depressed for the traffic stop and had to press the brake as hard as possible to prevent the car from taking off. The unexpected acceleration surge lasted about 5 seconds then ended. The car did move forward but in both cases I did not have any injuries or damages. …”

   NHTSA complaint #10345289, filed 2010-07, 90,000 miles
3. 3
   Body and structure

   Rusted front subframe / engine cradle

   • 13 complaints (9%)
   • median 102,500 mi at 13.5 yrs old (10 state mileage)
   • 1 mention a crash, fire or injury
   • filed 2013–2022

   Owners report being told during service or alignment work that the front subframe or engine cradle is rusted through, with holes or cracks, and in some cases that the vehicle should not be driven. Some complaints note the air conditioning drain routes onto the cradle and contributes to corrosion. Owners whose vehicles were not covered by a subframe campaign say they were told nothing could be done. Generally reported on higher-mileage, older vehicles, roughly 60,000 to 150,000 miles.

   What to check: Have the car put on a lift and inspect the front subframe and cradle mounting points for scaling rust, holes, or cracks, especially in states that use road salt. Ask whether the VIN was included in any prior subframe campaign.

   2 excerpts from owner complaints in NHTSA records

   “My subframe rusted straight through like the older models of the same car described I was told the problem over many years now but I took my car in recently to get an alignment and that's when it was discovered that it had rusted all the way through and was told it is not safe or usual the consumer stated the vehicle had the same recalled subframe, but the vehicle was not included in the recall.”

   NHTSA complaint #11288949, filed 2019-12, 150,000 miles

   “The engine cradle is rusting out it may affect the steering control and may cause a major accident. The control arms are mounted to the engine cradle.”

   NHTSA complaint #11382915, filed 2020-12, 62,000 miles
4. 4
   Transmission and drivetrain

   Rough or delayed automatic transmission shifting

   • 24 complaints (17%)
   • median 5,500 mi at 1.7 yrs old (21 state mileage)
   • 4 mention a crash, fire or injury
   • filed 2005–2022

   Owners describe the car lurching or jumping when put into drive, holding first gear longer than expected, or taking an extended time to shift. Several complaints mention jerking at highway speed and a loose or suspect throttle body sensor pin. Complaints say dealers sometimes could not reproduce the problem or found no stored fault codes. Reported mostly at low mileage, from a few hundred to around 90,000 miles, with several under 10,000 miles.

   4 related service bulletins

   What to check: Drive the car through a full warm-up, including several standing starts and a highway stretch, and note any hesitation or harsh engagement. Ask whether the transmission fluid was serviced with the specified fluid and whether adaptive shift values were ever reset.

   2 excerpts from owner complaints in NHTSA records

   “Car purchased new. About every 6 weeks; car is in drive; waiting for traffic to pass to enter roadway. Hit gas pedal, engine revs to 4000 rpms but does not move. After a few seconds, car jumps forward spinning drive wheels every time. The engine temp is slightly below normal. Had car to dealer at 400 miles and again at 5500. Cannot duplicate problem was their answer.”

   NHTSA complaint #10157155, filed 2006-05, 5,500 miles

   “- the contact owns a 2005 Hyundai xg 350. When accelerating the vehicle would not respond; the contact could feel the gears shift and the vehicle moving slowly. The dealer stated they were unable to diagnose the failure. The contact called the manufacturer and was unable to get a response. Updated 03/19/07.”

   NHTSA complaint #10181159, filed 2007-01, 22,000 miles

Buying note. On this model year, focus the inspection on the airbag warning light, the front subframe's condition on a lift, and how the throttle and transmission behave on a warm test drive; have any stored codes read before purchase. Because a warning light or a rusted cradle can end up as an expensive repair, a pre-purchase inspection by an independent mechanic is worthwhile.

Summary written with AI from a sample of 60 NHTSA complaints for this model year (picked at random, with complaints that state a mileage and recent ones taken first), then checked automatically against the source records. Where a problem shows a complaint count, every complaint for this model year was matched with fixed keyword rules (written with AI and tested against the sample), and the mileage, age and repair figures are calculated from those complaints; owners' figures are as stated, not verified. Other counts refer to the sample. The excerpts come from NHTSA's public complaint records and are unverified; capitalisation is normalised, NHTSA staff notes are removed, and shortened text ends with “…”. Something wrong? Request a correction.