Owner Faces Sudden Warning Light Before Handover, Completes Trade-In but Bears Heavy Negative Equity

Two hours before trading in her Kia for a new car, a female owner noticed the transmission warning light illuminate on her dashboard and experienced noticeable engine shaking. Although she had previously tried adding oil and replacing both the oil and filter, the issue persisted. In a social media video, she expressed dissatisfaction with the vehicle even before this incident and voiced concerns that the dealership might refuse to accept it due to the sudden malfunction just before the trade-in. Subsequent diagnostics revealed the problem wasn't with the transmission but rather an engine misfire caused by a faulty ignition coil. She replaced the third coil herself, yet the shaking continued. Faced with an imminent trade-in deadline, she ultimately decided to proceed with the transaction as planned. She disclosed that her remaining loan balance on the car was approximately $12,000, while the dealer offered only around $7,500 for the trade-in. This left her rolling roughly $4,500 in negative equity into her new car loan, increasing the total amount financed on the new vehicle to about $32,000. Later, she added that the actual issue might have been a vacuum leak from the intake manifold gasket, with estimated repair costs of around $500. However, pressed for time and uncertain whether additional hidden problems existed, she opted not to pursue further repairs. Some commenters noted that online platforms like Carvana had previously offered slightly higher quotes—close to $8,000—but she still chose to go ahead with the in-person trade-in.