Said It Here

How to tell if a mechanic actually replaced a part

Auto repair shops sometimes charge for parts they never installed or fake fake problems to upsell unnecessary work. This leaves drivers paying for labor and components they did not receive and makes it impossible to trust whether routine service was actually done.

What people tried

Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.

  1. 1
    Pulling and inspecting filters or parts personally
  2. 2
    Doing simple servicing by oneself
  3. 3
    Not trusting shops or dealerships anymore
  4. 4
    Fixing the issue oneself
  5. 5
    Taking the vehicle to a different shop for a second opinion
  6. 6
    Testing the mechanic with a staged setup

In their words

Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.

r/AskMechanics2 people · September 2026

“So is there any chance the place I took it to loosened the screw for me to come back?”source ↗

Aeronautic9-3 · r/AskMechanics · 114 upvotes

“Dude basically loosened it up and made it look like i needed 500 dollars in work.”source ↗

AlfredoCheeseSauce · r/AskMechanics · 2 upvotes
r/MechanicAdvice1 person · September 2026

“Supposedly both filters were changed last month at an independent shop when I had my car in for an ac compressor replacement. Today, I had my oil changed at a different shop and they told me both filters needed replacement, so I declined and pulled the cabin filter out myself..”source ↗

bluesea089 · r/MechanicAdvice · 4 upvotes

Where this came up

People with this problem also raised