1999 Hyundai Sonata engine and engine cooling problems
23 owner complaints filed with NHTSA name the engine and engine cooling on the 1999 Hyundai Sonata — 19% of all complaints for this model year.
What owners report
“I purchased my 1999 sonata from a used car dealer & have had numerous problems with the car, its been a nightmare, one problem after another!!!! The crankshaft sensor had to be completely replaced because the component had severely melted, issues with the transmission, abs/airbag warning light on…”
filed Dec 11, 2011
“Tl* the contact owns a 1999 hyundai sonata. The contact received repairs under nhtsa campaign id number: 09v124000 (suspension). The vehicle was taken to a local mechanic because the motor was excessively loud after the recall repair. In addition, the contact stated the vehicle would sway back and…”
filed Aug 19, 2010
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
This bulletin provides important checkpoint guidelines when performing engine oil and filter change services.
23-EM-005H · Service Bulletin/Repair Instructions · issued Oct 13, 2023Follow the guidelines outlined in this bulletin to inspect and clean or replace certain components of the engine intake system accordingly during engine short block or sub-assembly replacement.
22-EM-010H · Service Bulletin/Repair Instructions · issued Jul 28, 2022This bulletin provides the service procedure for engine connecting rod bearing clearance testing. Perform the procedure outlined in this bulletin to fulfill the Bearing Clearance Test inspection requirements to…
21-EM-004H · Service Bulletin/Repair Instructions · issued Mar 30, 2021This bulletin provides the inspection procedure and repair guidelines for certain vehicles listed below.
21-EM-003H · Service Bulletin/Repair Instructions · issued Mar 10, 2021
Engine and Engine Cooling problems in other Sonata years
| Year | Reports | Share |
|---|---|---|
| 2023 Sonata | 2 | 2% |
| 2021 Sonata | 1 | 1% |
| 2019 Sonata | 7 | 4% |
| 2018 Sonata | 14 | 4% |
| 2017 Sonata | 18 | 2% |
| 2016 Sonata | 16 | 2% |
| 2015 Sonata | 21 | 2% |
| 2014 Sonata | 21 | 3% |
| 2013 Sonata | 40 | 2% |
| 2012 Sonata | 11 | 1% |
| 2011 Sonata | 45 | 1% |
| 2009 Sonata | 6 | 1% |
Other reported problem areas on the 1999 Hyundai Sonata
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.