1999 Mazda MX-5 Miata electrical system problems
10 owner complaints filed with NHTSA name the electrical system on the 1999 Mazda MX-5 Miata — 14% of all complaints for this model year.
What owners report
“Intermittent failure of ignition "coil pack" leading to costly replacement of cat. Converter, o2 sensor, and coil packs. Mfr never covered this under any sort of extended warranty, even though the problem is not uncommon, and evidently bad parts are still in the system. Multiple failure dates. *tr”
filed Sep 10, 2008
“1999 10th anniversary mazda miata currently with 33,900 miles on it. About 600 miles ago car suddenly started and ran rough with check engine light on. Had code checked and revealed p0300 (random misfire I.e.ignition coil pack failure). Check engine light went out after reading code. Symptom…”
filed Oct 2, 2006
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
Speedometer replacement procedure
09-016-23 · Service Bulletin/Repair Instructions · issued Feb 28, 2023This service bulletin provides testing and charging procedures in order to promote proper battery maintenance, to deliver new vehicles with fully charged batteries, and to reduce unnecessary battery replacement cost…
01-006-21-3779 · Service Bulletin/Repair Instructions · issued Feb 8, 2021The Mazda DCA-8000PM is required for all warranty battery testing. If the Mazda DCA-8000PM is not used, incorrect battery testing may result in unnecessary battery replacement. Use the following test procedures in this…
01-005-21-3778 · Service Bulletin/Repair Instructions · issued Feb 8, 2021In accordance with Federal regulations, follow the procedure listed below when replacing a speedometer
09-002-21-3770 · Service Bulletin/Repair Instructions · issued Jan 21, 2021Speedometer replacement procedure
0900716 · Service Bulletin/Repair Instructions · issued Feb 17, 2016
Electrical System problems in other MX-5 Miata years
| Year | Reports | Share |
|---|---|---|
| 2002 MX-5 Miata | 3 | 15% |
| 2000 MX-5 Miata | 4 | 14% |
| 1996 MX-5 Miata | 1 | 3% |
| 1995 MX-5 Miata | 3 | 10% |
| 1992 MX-5 Miata | 3 | 14% |
| 1991 MX-5 Miata | 2 | 10% |
Other reported problem areas on the 1999 Mazda MX-5 Miata
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.