Re-read the IRS thing carefully. If you sell it and don't have reason to believe it will be changed as described above, then you are not subject to the recapture rules.

You must recapture the deduction for clean-fuel vehicle property if the property ceases to qualify within 3 years after the date you placed it in service. The property will cease to qualify if it is changed in any of the following ways.

1. It is modified so that it can no longer be propelled by a clean-burning fuel.
   
2. It ceases to be a qualified clean-fuel vehicle property (for example, by failing to meet emissions standards).
   
3. It becomes nonqualifying property, defined earlier.
   

Sales or other dispositions. If you you sell or otherwise dispose of the vehicle within 3 years after the date you placed it in service and know or have reason to know that it will be changed in any of the ways described above, you are subject to the recapture rules. In other dispositions (including a disposition by reason of an accident or other casualty), the recapture rules do not apply.

From what I see, I have no reason to believe there is any penalty if you just sell or trade in the vehicle.