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Best Car Repair Subreddits (November 2026)

Most car repair talk on Reddit happens in a few big places, but the smaller communities are where the specialists are. We checked the communities Reddit returns for “car repair” and “mechanic advice”, kept the public, safe-for-work ones with at least 25,000 members that are still posting, and ranked the 7 that remain by size. Together they have 2.8M members.

How the car repair communities compare

Membership is concentrated: the three largest communities hold 92% of all members on this list, so most of the car repair conversation happens in a handful of places. r/MechanicAdvice is both the biggest and the busiest, with about 262 new posts a day. Per member, the liveliest is r/AskMechanics: 200 posts a day from 274.8K members — a smaller crowd, but an engaged one. The oldest is r/mechanic, founded in 2009, and every community here is more than five years old — this is a long-established corner of Reddit.

The 7 biggest car repair subreddits

  1. r/MechanicAdvice 2,158,253 members · ~262 posts/day · +2.6K since Oct 26 · since 2012

    This is more than a car repair forum! Please read and follow the posting rules listed in the right hand sidebar.

  2. A
    r/AskMechanics ↗ 274,824 members · ~200 posts/day · since 2012

    Ask Mechanics

  3. A
    r/AskAMechanic ↗ 103,757 members · since 2010

    Ask your automotive questions here

  4. M
    r/mechanics ↗ 83,353 members · ~9.6 posts/day · since 2010

    A lounge for mechanical technicians in any field! This is NOT a help sub! All posts by non-Verified Mechanics are subject to approval before going live. Please read the rules before submitting a post.

  5. M
    r/mechanic ↗ 79,179 members · ~24 posts/day · since 2009

    Fix your car with the help of a Mechanic

  6. M
    r/mechanicalheadpens ↗ 37,802 members · since 2014

    Subreddit for people that enjoy mechanical keyboards, headphones, and fountain pens to post pictures of their set up and converse about all things keyboards, headphones, and pens.

  7. C
    r/CarMechanicSimulator ↗ 25,487 members · ~2.6 posts/day · since 2014

    A Sub dedicated to Car Mechanic Simulator's fans. Please flair any questions with your system. Memes will be allowed as long as they are game related, and is subject to change if enough backlash comes in. Please tag all memes wit…

Choosing where to post

If you have a question, start in r/MechanicAdvice: it is set up for exactly that, and with about 262 new posts a day there are plenty of people around to answer.

Big subreddits give a post the widest audience, but they also bury it quickly; the mid-sized communities on this list are usually friendlier for questions and first posts. Always read the rules in the sidebar first — each community is run by its own volunteer moderators. Our guide to searching Reddit explains how to dig through any of these communities, and the subreddit info tool gives you the stats of one we don't list.

Frequently asked questions

Which car repair subreddit has the most members?

r/MechanicAdvice is the largest, with 2,158,253 members, followed by r/AskMechanics (274.8K) and r/AskAMechanic (103.8K).

Where are the most new car repair posts?

By new posts per day, r/MechanicAdvice leads with about 262, ahead of r/AskMechanics (200). Counts are averages over the last seven days.

Which car repair subreddit is best for questions?

r/MechanicAdvice is the one built around questions and advice, with about 262 new posts a day. Check its rules and search it first — common questions have usually been answered.

How many car repair communities are on this list?

We list 7 active, safe-for-work car repair communities with at least 25,000 members each, 2.8M members in total (people can be in several). Reddit has many smaller ones too; our guide on searching Reddit shows how to find them.

What is the oldest car repair subreddit?

r/mechanic, created on Mar 30, 2009.

Are these car repair subreddits safe for work?

Yes. Every community on this page is public and not marked 18+ by Reddit, and we filter out communities whose name or description points to adult content.

Data: Reddit's public subreddit search and the Arctic Shift archive (Nov 6, 2026), growth from SubMouse's weekly snapshots. Member counts of communities outside our Top 1000 come from the archive and can lag a little. Not affiliated with Reddit.