2012 Hyundai Equus Transmission and drivetrain Problems
- Complaints
- 4about this part
- Share
- 50%of 8 total for the year
- Median mileage
- 41,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 4 complaints about the transmission and drivetrain of the 2012 Hyundai Equus, 50% of the 8 complaints for this model year. Where a mileage was given, the median is 41,000 miles.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“I was driving on the highway and my transmission due to a failed transmission service done to my vehicle caused my vehicle’s transmission to overheat a blowout my transmission cooler and mix coolant and transmission fluid unknown to me because of a clogged transmission cooler line improperly flushed instead of replaced by the Patrick Hyundai dealership there could’ve been and electrical fire or a crash due to these things.”
NHTSA complaint #11748611, filed 2026-07“I am reporting a severe vehicle safety hazard involving a sudden loss of motive power and extreme thermal failure on my 2012 Hyundai Equus Signature 5.0L. In July 2022, at 88,845 miles, an authorized Hyundai dealership replaced the transmission under a factory warranty event. Rather than replacing the transmission oil cooler assembly—which was contaminated with heavy metal shrapnel from the original mechanical breakdown—the servicing dealer chose to only flush the lines, creating a latent fluid restriction. …”
NHTSA complaint #11749120, filed 2026-07“I am writing to log an immediate emergency update to my vehicle safety report regarding my 2012 Hyundai Equus Signature 5.0L. On Friday afternoon, July 10, 2026, Hyundai Motor America’s corporate office formally initiated a high-level Tier-2 supervisor review to investigate the severe powertrain safety hazard currently present on my vehicle—specifically, a catastrophic internal rupture of the transmission fluid cooler loop that has cross-contaminated and flooded my engine block infrastructure and main radiator with high-velocity metallic shrapnel. …”
NHTSA complaint #11749721, filed 2026-07“The contact owns a 2012 Hyundai Equus. While driving at various speeds, the vehicle jolted continuously and shifted independently into another gear. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 41,000.”
NHTSA complaint #10692893, filed 2015-03, 41,000 milesRelated service bulletins
- 10253275Apr 9, 2024This TSB provides a procedure to diagnose and replace, if necessary, an automatic transmission with Incorrect Ratio DTC (transmission clutch slip in gear above limit) listed on…
- 10204249Nov 8, 2021This bulletin describes the procedure to replace the 35R and 4&OD solenoids for a shift flare and/or harsh shift during the 2~3, 3~4 or 4~5 upshift.
- 10174807Apr 17, 2020The automatic transmission warranty repair policy authorizes in-dealership repairs of the following components for both OEM (new) and remanufactured automatic transmissions:
- 10170511Dec 17, 2019If you are servicing a vehicle with a transmission slipping concern, follow the Service Procedure shown below and perform a stall test. This TSB provides a procedure to test each…
- 10163286Jun 12, 2019This bulletin provides a procedure to diagnose an 8-speed automatic transaxle with a harsh and/or delayed shift using GDS.
- 10160100Apr 15, 2019When servicing a vehicle with a ?Check Engine light? and any of the DTCs listed below, follow the Service Procedure and replace the related solenoid and E-module.
- 10160098Apr 15, 2019This bulletin provides the procedure to write the Vehicle Identification Number (VIN) during the replacement of the Engine Control Module (ECM) or Powertrain Control Module…
- 10160097Apr 15, 2019This bulletin provides a procedure to transfer oil pressure data to the TCU using GDS Mobile. This procedure is necessary to reduce the TCU learning time and improve the shift…
- 10110919Feb 2, 2017The following vehicles are equipped with an 8-speed automatic transmission. The ATF level can be checked by the procedure shown below.
- 10089506Dec 6, 2016Do not replace the transmission for the dtc listed. Instead, follow the repair procedure and replace the e-module.
Transmission and drivetrain: other model years
Other parts of the 2012 Hyundai Equus
3 complaintsSuspension
2 complaintsAir bags
1 complaintsElectrical system
1 complaintsElectronic stability control
1 complaints
← All problems reported for the 2012 Hyundai Equus
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology