Roommate borrows car without permission, gets upset when denied: AITA?

A 28-year-old woman refused to let her 26-year-old roommate borrow her car after the roommate took it for “urgent errands” without permission. It sounds simple, until the car came back with a scratch on the bumper, plus the roommate acted like it was no big deal.

Here’s the mess: OP keeps her keys in a designated spot, then noticed her car was moved and the gas tank was way lower than it should be. When she confronted her roommate, the truth came out fast, she’d used the car without asking, apologized, and claimed she had to run out right away. Then, a scratch appeared, and the roommate insisted it was already there.

So when the roommate asked again the next week, OP said no, and that’s when the roommate started calling her unreasonable.

Original Post

So I'm (28F) living with my roommate (26F), and things have generally been fine until recently. Quick context: I have a car that I use to commute to work and run errands, and I usually keep the keys in a designated spot in our apartment.

One day, I noticed that my car had been moved from its parking spot and the gas tank was significantly lower than when I last used it. I confronted my roommate about it, and she admitted to taking my car without asking to run some personal errands.

She apologized and said she needed to get something urgently. I was upset that she didn't ask for permission and used up my gas.

I told her this was not okay and that she should have at least informed me beforehand. To make matters worse, she returned the car with a scratch on the bumper, claiming it was there before.

I was frustrated but decided to let it go. The issue arose again when she approached me to borrow my car the following week, stating hers was in the shop for repairs.

I hesitated, given the previous incident, but ultimately told her no, as I felt she hadn't respected my boundaries before. Now she's upset and claims I'm being unreasonable.

Am I the a*****e for refusing to let her borrow my car after she used it without permission?

Why This Request Crossed a Line

This situation highlights the often precarious nature of roommate relationships, especially when it comes to personal belongings. The original poster (OP) clearly set a boundary by not allowing her car to be borrowed without permission, a line her roommate crossed. This moment becomes particularly contentious when you consider that the roommate returned the car with a scratch and tried to downplay it. It raises questions about accountability and respect in shared living spaces.

When the roommate got upset after being denied further access to the car, it revealed a deeper conflict: the expectation that roommates should operate under an implicit ‘sharing code.’ However, this mindset can lead to resentment, especially when one party feels their boundaries have been disrespected. The OP's refusal to lend the car again was not just about the vehicle; it was about maintaining control over her possessions.

The gas tank drop and the keys being moved from their usual spot is where OP’s patience started to crack.

Comment from u/quirkymonkey88

NTA - Your car, your rules. She crossed a line by using it without asking and damaging it. She needs to earn back your trust.

Comment from u/DramaticPickle27

She's definitely the a*****e for taking your car without permission and returning it damaged. You have every right to set boundaries.

Comment from u/cheesecake_gal

YTA - I get why you're upset, but maybe consider helping a friend in need. However, she should have respected your boundaries in the first place.

Comment from u/sleepyowl_11

NTA - Borrowing someone's car without permission is a major breach of trust. Your roommate needs to understand and respect your boundaries.

After that first “urgent” car trip, the scratch on the bumper made the apology feel less like accountability and more like damage control.

Comment from u/RedditIsLife99

It's your car, so your decision. She should have respected your boundaries in the first place by asking. NTA.

It also echoes the sister who used the car without permission, and the OP refusing to share.

Comment from u/theater_geek_23

NTA - You have every right to say no after she disrespected your trust by taking your car without permission in the first place.

Comment from u/PizzaAddict81

She's definitely the a*****e for not respecting your boundaries and taking your car without asking. NTA for setting limits.

Then, right on schedule, the roommate came back asking to borrow the car again because her own was “in the shop.”

Comment from u/artsy_avocado13

NTA - You're not obligated to lend out your car, especially after what happened. She needs to understand and respect your boundaries.

Comment from u/GamerGirl365

Your roommate should have known better than to use your car without asking. You're NTA for setting boundaries, especially after what happened.

Comment from u/catlover47

NTA - Using your car without permission and returning it damaged is a big violation of trust. You're completely justified in setting boundaries.

OP finally said no, and the roommate flipped it into a whole fairness argument instead of owning what she did before.

What are your thoughts on this situation? Share your perspective in the comments below.

Community Reactions Show the Divide

The Reddit thread surrounding this story revealed a fascinating divide in community reactions.

Final Thoughts

This story serves as a reminder that boundaries in roommate relationships are crucial yet often fragile.

This situation showcases how quickly boundaries can be crossed in roommate dynamics.

Nobody wants to share a car with someone who treats permission like a suggestion.

For a similar trust-breach, read about a friend who took the car, and the OP who refused to lend it again.