Update: Thanks so much for all your comments. I talked to my aunt about the different options, and the car is going to be thoroughly cleaned by a professional hazmat team. Some repair work will also be done. She’s not keeping the car. Instead, she’s informed the bank about what happened, and they’ve asked her to call back once the cleaning and repairs are finished to figure out the next steps. 
My cousin didn’t have an estate he was still living with his parents while looking for an apartment. I truly appreciate all the helpful advice.
As for the car, my aunt asked me what will happen now that my cousin isn’t around to make the payments. He had just financed the car three months ago and was the only person on the loan, no cosigner. Unfortunately, earlier this week, he took his own life. He had been in therapy, but no one really knows why he decided to end it.
She doesn’t want to keep the car since it’s where he passed. What happens now? I don’t know much about this and would rather not rely on Google for answers.
Firstly, I hope the best for you and your family and extend my deepest condolences for the loss of your cousin.
Here, there are two possible outcomes.
Your cousin’s executor/administrator will be someone (your aunt, perhaps?). They can sell the car, pay off the loan, and inform the lender of his passing.
She can give the lender notice and instruct them to seize the vehicle.
The value of the car relative to the amount owed determines which course is preferable in this situation. The repo route is probably the simplest if he funded the entire amount. He will lose the money from the down payment if he made a sizable one and they repossess it.
They can get in touch with the lender and repossess the car if you know where he purchased it.
I truly apologize for your loss. If no payments are received, the vehicle will be repossessed. Kindly look after yourself <3
My sincere condolences for your loss and those of your family.
Numerous elements are at play in relation to your inquiry. The explanation provided in this article is excellent.
What happens to a car loan when someone passes away? Auto Loans – Forbes Advisor
She is presumably the executor of his estate.
Have your aunt reach out to the bank to arrange a voluntary repossession of the car. After it’s repossessed and sold at auction, here’s what usually happens: the bank will often remove any interior parts with biological material, though this can be costly and is typically done only if it’s worth the investment. Some cars are sold “as-is.” If the vehicle is cleaned, certain states require disclosing the prior events, while others don’t. It really depends on the state’s regulations.
I appreciate all of the feedback thus far. I will give my aunt this. She is understandably very upset, so it will require some time.
I think the car will be repossessed by the bank. If it’s a local bank and she knows who the lender is, she can also give it to them. After my MIL passed away, we drove her car to the bank and gave the keys back. That is what we did with it.