The biggest drawback to a hybrid car is the battery systems. Nearly all hybrid cars use batteries that are integrated into the powertrain. That's good news when you're on the road, since it means the car operates under battery power some of the time. ... The problem comes when the batteries can no longer hold a charge.

What is wrong with hybrid?

Hybrid Engine Problem

High levels of oxygen are more noticeable in hybrid vehicles. These measurements signal if there is an issue with gas mileage. Low oxygen sensors often result in decreased fuel economy as well. Replacing oxygen sensors can be very expensive, but they will be useful over time.

Why are hybrid cars not good?

First, acceleration in hybrids is generally very poor, even if they are capable of a reasonable top speed. Second, the batteries degenerate faster than one is accustomed to with a standard car battery, and need to be replaced every 80,000 miles or less. These batteries cost several thousand dollars each.