The 1999 Hyundai Elantra has two recalls, the more serious being an automatic transmission fluid leak that can cause the transmission to slip and leave the vehicle unable to accelerate normally when the driver presses the gas pedal.
The transmission leak comes from seals inside the pressure control solenoid valve that lose their elasticity over time, allowing fluid to escape and reducing pressure to the clutch and brake components inside the transmission. Extended slippage can also wear down those internal friction surfaces, potentially worsening the problem over time. The second recall involves the mass airflow sensor, where engine vibration can disrupt the electrical signal to the sensor and cause the engine to stall unexpectedly at low speeds, raising the risk of a crash.
At a glance
What can fail
Engine may stall unexpectedly at low speeds because vibrations can interrupt the electrical signal in the mass air flow sensor connector.
What the fix does
Dealer replaces the sensor connector and wiring harness section with a new relief loop to reduce vibration transmission to the connector.
Summarized — see the official notice for exact wording, dates, and contacts.
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At a glance
What can fail
The seals on the automatic transmission's pressure control solenoid valve lose their elasticity, causing transmission fluid to leak. This reduces pressure to the clutches, brake, and kickdown servo, making them slip.
What the fix does
The dealer will replace the pressure control solenoid valve.
Summarized — see the official notice for exact wording, dates, and contacts.
