Split image: Left side shows a car engine filled with chewed pinkish material. Right side shows a large snake coiled among engine components under a car hood.

Mechanics have a life that is full of surprises, and not always the good kind. Between bizarre customer issues and repairs that go in every direction except the one you planned, the job can turn into a comedy of errors more often than people realize. The moments in this collection capture the kind of fails that make mechanics shake their heads and laugh because sometimes, that’s the only thing you can do.

Some of these situations are messy and a few are down right impressive in the wrong way. Together, they paint a picture of the challenges mechanics face and the sense of humor required to get through a day in the shop. Let’s dive into 20 fails that sum up the life of mechanics.

1. They were trying to fill their tires to 100%

Car dashboard display showing outside temperature 52°F, gear in Park, direction West, range 47 miles. Tire pressures: front left 93 psi, front right 97 psi, rear left 96 psi, rear right 94 psi. Odometer: 126,857 miles. Warning light on.
wetrag/VIA Reddit.com

2. “You can’t explain to the elderly that they don’t need an oil change after six months and twenty three miles.”

Golden engine oil pours from the underside of a vehicle during an oil change in a garage, with a tire and automotive equipment visible in the background.
brianthelion83/VIA Reddit.com

3. That’s a design flaw if I’ve ever seen one

Thick, dark engine oil is flowing from a car's oil pan drain plug into a black container during an oil change in a workshop with a blue wall in the background.
hermankibble172/VIA Reddit.com

4. “The customer told me his car sounded different when he started it this morning. He didn’t understand it when I told him he was robbed.”

The image shows the underside of a vehicle with a missing catalytic converter, evident by the cut pipes and exposed heat shield where the part has been removed.
tonyxwing74/VIA Reddit.com

5. The hood opens, the hood is immediately slammed shut

A possum is nestled in a pile of dry leaves inside the engine compartment of a car with the hood open, while a person stands nearby in a garage or workshop.
lotus496/VIA Reddit.com

6. Ladies and gentlemen, the award for worst battery placement goes to

A red Ferrari with its front left wheel removed, exposing the brake disc, suspension, and a Varta battery inside the wheel well. The car is parked on a paved surface next to a stone wall.
ryan-malta/VIA Reddit.com

7. “The third car we’ve had towed in within a week for a no start after refueling at a local gas station. This fuel sample is about 96% water.”

A clear plastic bottle with a black cap is partially filled with liquid, showing measurement markings labeled E 95% to E 10% and "GASOLINE FAILURE" on the side, placed on a metal surface in a workshop setting.
_it_/Via Reddit.com

8. “Do not put solvents down the sink” is evidently too complicated for some people

Two white PVC pipes with damaged, broken ends lie on a wooden surface outdoors, with one pipe more severely deteriorated than the other. Red siding is visible in the background.
justanotherdogsbody/VIA Reddit.com

9. The customer heard a rattling noise under the hood, none of the mechanics are touching it

Three mechanics refused to work on the car because a large brown and black snake is coiled among wires and engine parts under the hood of a car.
ridethepig101/VIA Reddit.com

10. Please remember to remove your firearms before dropping your car off at the mechanic

A car’s center console holding various pens in a cup, a holstered handgun, and another gun with a yellow handle tucked beside the seat. The dashboard and interior are tan and brown, with red bandanas hanging nearby.
halfasteddie/VIA Reddit.com

11. Ah, yes, a coat hanger collector

An open car trunk filled with a large pile of wire hangers. A hand is holding a single wire hanger in the foreground. Some magazines or papers are visible to the left inside the trunk.
mrfrunzi1/VIA Reddit.com

12. The mechanic refused to work on this car… I wonder why?

A car seen from the rear window is cluttered with various items, including a cat litter box filled with litter and numerous colorful toys and objects scattered across the backseat and rear deck.
redclayroods/VIA Reddit.com

13. Do you think someone fell for it?

The front of an auto repair shop with signs advertising "Pumpkin Spice Brake Pads $89.95," "NJ Auto Repair & Transmissions," and a blue DELTA sign near the entrance. An American flag is on display.
ryeguy36/VIA Reddit.com

14. I’ve never seen a car fail a home inspection before

View from beneath a vehicle showing the suspension, wheel, drive shaft, and rusted components of the chassis, with automotive repair equipment visible in the background.
waffle911/VIA Reddit.com

15. The customer took their car to the mechanic and said “the front seat won’t move forwards or backwards”

The interior of a car with the driver's door open, showing the floor covered in a large amount of sauce packets scattered beneath the steering wheel and seat.
_elreaper/VIA Reddit.com

16. The new guy left a couple shop rags in the engine valley when doing intake gaskets. Now he gets to replace the engine

A car engine with its cover removed, exposing the camshaft tangled with shredded pink insulation-like material, while two people inspect the engine.
king_chingas/VIA Reddit.com

17. “They had it towed to the shop with the e-brake on.”

A white SUV with a flat rear tire and muddy lower panels is parked on asphalt. In the background, a white Waste Management truck and building are visible under a cloudy sky.
tablepancakeschair/VIA Reddit.com

18. The lead tech has finally lost it

A man in an inflated white suit stands in a garage, with a flexible duct from a window air conditioner running into his suit. A car with its hood up is behind him. Text at the bottom reads, "I've had it with this heat.
imnotonmytablet/VIA Reddit.com

19. I don’t get some people

Two used oil filters on a pink cloth: the left filter is relatively clean and labeled "6,000 miles," while the right filter is heavily covered in black sludge and labeled "??? miles.
brrnugt/VIA Reddit.com

20. “Good thing I wore gloves.”

A person’s right hand and forearm are covered in black grease while holding a wrench over a concrete surface. The person is wearing two rings on their ring finger.
halfar/VIA Reddit.com

Want to see more fails?

Check out 20 Shrinkflation Fails That Are Nothing Short Of Dissappointing, or take a look at 20 Weird and Wonderful Fails from the Dawn of AI Generation.

Meet the Writer

Patrick is a writer based in upstate New York, where he grew up and still calls home. Over the past year, he’s been diving deep into storytelling, especially tales rooted in history, the Wild West, lost treasures, and ancient artifacts. He’s also drawn to unsolved mysteries and whatever the internet can’t stop talking about.

Whether it’s a centuries-old legend or a bizarre internet rabbit hole, Patrick is always chasing the threads of a compelling story. When he’s not chasing stories, Pat’s probably hiking mountain trails with his dog, exploring new corners of the U.S., or doom-scrolling between hangouts with friends and family. He finds inspiration in nature, forgotten places, and random conversations—anything that sparks curiosity. Whether it’s city streets or backcountry paths, Patrick’s always on the lookout for the next great story.