Problems · NHTSA complaints
2004 Hyundai XG 350 problems
Owners filed 91 complaints about the 2004 Hyundai XG 350 with NHTSA between Nov 2003 and May 2024. The most-cited component is vehicle speed control (22).
Complaints
91
Filed with NHTSA
Crashes
16
Reported by owners
Fires
4
Reported by owners
Injuries
5
People reported injured
Deaths
0
Reported to NHTSA
Complaints by component
One complaint can cite several components
- Vehicle speed control22
- Air bags21
- Suspension14
- Structure12
- Service brakes, hydraulic10
- Electrical system8
- Engine5
- Power train5
- Steering4
- Engine and engine cooling4
- Service brakes3
- Fuel/propulsion system2
- Wheels2
- Exterior lighting2
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
Data from NHTSA Complaints API · synced Oct 28, 2026NHTSA vehicle page
When complaints were filed
Does it get worse with age? Complaints per calendar year filed
2
4
11
13
3
2
5
6
4
3
4
8
7
4
6
2
4
0
0
1
1
1
View as table
| Model year | Complaints filed per calendar year |
|---|---|
| 2003 | 2 |
| 2004 | 4 |
| 2005 | 11 |
| 2006 | 13 |
| 2007 | 3 |
| 2008 | 2 |
| 2009 | 5 |
| 2010 | 6 |
| 2011 | 4 |
| 2012 | 3 |
| 2013 | 4 |
| 2014 | 8 |
| 2015 | 7 |
| 2016 | 4 |
| 2017 | 6 |
| 2018 | 2 |
| 2019 | 4 |
| 2020 | 0 |
| 2021 | 0 |
| 2022 | 1 |
| 2023 | 1 |
| 2024 | 1 |
Mileage at failure isn’t a structured field in NHTSA complaint data, so we don’t chart it. Some owners mention it in their reports below.
Top problems in owners’ words
Verbatim from NHTSA complaints, newest first
Vehicle speed control
22 reports11 crashes
“UNINTENDED ACCELERATION. WE HAVE REPORTED THIS DEFECT TO HYUNDAI DEALERS AND CORPORATE OFFICE TO NO AVAIL. U.S. TRANSPORTATION SECRETARY RAY LAHOOD, MARCH 2010, ANNOUNCED TWO MAJOR INVESTIGATIONS DESIGNED TO ANSWER SAFETY ISSUES OF UNINTENDED VEHICLE ACCELERATION FOR ALL MANUFACTURES. WHAT HAVE YOU AT NHTSA IDENTIFIED AND ADDRESSED AS POTENTIAL VEHICLE-RELATED CAUSES OF UNINTENDED ACCELERATION?”
Air bags
21 reports4 crashes
“AIRBAG LIGHT CAME ON IN 2011 AND WAS TOLD ENTIRE SEAT HAD TO BE REMOVED TO STOP LIGHT. COULD NOT AFFORD THE COST. RETURNED TO DEALER AGAIN IN 2014 AS HAD READ CONNECTOR UNDER SEAT MIGHT BE DISCONNECTED WHICH COULD BE CAUSING THE PROBLEM AND DEALER FOUND THIS TO BE TRUE AND SECURED THE CONNECTED AND THE LIGHT WENT OUT; HOWEVER, WITHIN FEW WEEKS, LIGHT CAME BACK ON AND HAS REMAINED ON SINCE. I DID NOT ASK THE DEALER ABOUT IT AGAIN, KNOWING I WOULD HAVE TO PAY FOR A MAJOR TAKE-OUT OF THE SEAT TO CORRECT. OVERALL, THE LIGHT HAS BEEN ON FOR AT LEAST 5 YEARS. I AM THE ORIGINAL OWNER. THE LIGHT CAME ON BEFORE MILEAGE WAS 51,131 AND MILEAGE IS CURRENTLY 83,486. I COVER THE LIGHT WITH ELECTRICAL TAPE AS IT DISTURBS ME THAT I CAN'T GET IT EASILY FIXED. I DOUBT IF THE AIRBAGS WORK BUT DON'T KNOW FOR SURE AND PROBABLY WON'T UNLESS I HAVE AN ACCIDENT OR A RECALL IS MADE FOR THE DEALER TO FIX THE PROBLEM.”
Suspension
14 reports1 crash1 fire
“vehicle has a front rusted subframe in two spots on passenger side it will not pass inspection. it is Dangerous to keep driving it it looks like there is a recall on this issue in 04/2009, but it says 0 unrepaired recalls which is obviously not correct Manufacturer: HYUNDAI MOTOR COMPANY Mfr's Report Date: APR 14, 2009 NHTSA CAMPAIGN ID Number: 09V124000 EA08016 NHTSA Action Number: EA08016”
Structure
12 reports1 fire
“THERE IS VISIBLE RUST/CORROSION DAMAGE OF THE FRONT SUB- FRAME OF MY VEHICLE. THE FRONT SUBFRAME HAS THINNED AT RUSTED LOCATION. THE RUSTED SUB-FRAME IS CHEWED HALF OF MY SUB-FRAME. I AM WORRIED THAT CORROSION MAY PROGRESS AND MAY DETACH FROM THE SUB-FRAME, EVENTUALLY INCREASING SAFETY RISK. I HAVE NOTICED STEERING PULL.”
Service brakes, hydraulic
10 reports2 crashes1 fire
“TL* - THE CONTACT OWNS A 2004, HYUNDAI XG350. THE CONTACT STATED THAT A NUMBER OF TIMES WHEN HE APPLIED THE BRAKES THE VEHICLE ACCELERATED. THE CONTACT STATED THAT ON 02/16/2007 WHEN HE APPLIED THE BRAKES THE VEHICLE KEPT ACCELERATING AND HE HIT THE VEHICLE IN FRONT OF HIM. THE VEHICLE STRUCK THE BUMPER OF THE SECOND VEHICLE AND THERE WAS NO DAMAGE, A POLICE REPORT WAS NOT FILED. THE CONTACT STATED THAT THE ROADS WERE SLICK AND WET AND HE WAS GOING UPHILL. THE CONTACT STATED THAT THERE WAS SLUSH ON THE ROAD, AND HE WAS SLOWING DOWN FOR A TURN DOING 5 MPH. THE CONTACT STATED THAT MECHANIC BELIEVED THE FAILURE WAS IN THE COMPUTER THAT CONTROLS HOW MUCH GAS FLOWS INTO THE ENGINE. THE CURRENT AND FAILURE MILEAGE WERE BOTH 30000. *AK”
Electrical system
8 reports1 fire
“TL* THE CONTACT OWNS A 2004 HYUNDAI XG350. WHILE EXITING A PARKING SPACE, THE VEHICLE ACCELERATED INDEPENDENTLY. THE CONTACT DEPRESSED THE BRAKE PEDAL VARIOUS TIMES, BUT THE VEHICLE FAILED TO STOP UNTIL THE IGNITION KEY WAS TURNED TO THE OFF POSITION. THE VEHICLE COULD BE RESTARTED, BUT THE FAILURE RECURRED. THE VEHICLE WAS TAKEN TO THE DEALER AND AN INDEPENDENT MECHANIC WHERE THE FAILURE WAS UNABLE TO BE REPLICATED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS 80,000.”
Data from NHTSA Complaints API (owner reports, unverified) · synced Oct 28, 2026
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.