[skidplate]

First Aid kit and triangles (from Euro delivery)
Owner's manual
Cargo net
3 Flares
Weathertech mat
JL Audio 10" H.O. Wedge subwoofer.
JL Audio XD600/1ch amplifier

[Jonny86]

JL audio vxi700/5 amp
JL 10w6 sub in sealed box
Invisible glass spray
Rag company microfiber

That’s it!

So when I take those turns or accelerate hard I know stuff isn’t rolling around back there. Summer car only btw. No need for other stuff.

[Ajowhan]

Spare emergency condoms.

[freakystyly]

Originally Posted by zoro2001

Not freakystyly,
When my kid wanted his bike delivered to college I had to remove the front tire to fit it. Even then I had my wife help with the bike to make sure I didn't damage anything on the car!!

Yes front wheel off. Pedal location is important to keep an eye on because they will likely try to get caught on stuff, including the bumper if you aren't careful.

Originally Posted by Ajowhan

Spare emergency condoms.

Those go in the cargo box on the roof.

[XutvJet]

- $25 Harbor Freight scissor jack that fits perfectly into the OEM plastic jack points. The jack is velcroed to the floor.

- In the battery area: Expandable lug wrench and small bag of tools including common E-torx and metric sockets, 8" ratchet and 3" extension, pick tool, plastic trim tool, knife, screw driver with a number of bits in the handle, duct tape, electrical tape, two hose/worm clamps, tow hook, tire puncture kit, heavy duty nitrile gloves, stock air compressor, and tire slime.

[MarcoZandrini]

Craftsman 1/2" ratchet with short extension and a 6 point 17mm socket. To complement those, a 15" metal pipe to add leverage. The pipe is wrapped in leftover headliner material from my old E46. Also, a spray bottle with homemade window cleaner, a squeegee and a roll of paper towels.

Homemade window cleaner:
60% water
20% distilled white vinegar
20% alcohol (70% alcohol is fine)
8 to 10 drops of Dawn in a 2l bottle containing the above. This stuff never streaks!

[albertw]

A bag with basic tools - socket set, adjustable wrenches, Visegrip, multi-bit screwdriver, tire pressure stick, knife - follows me from car to bike to plane. Once a year or so I'm really glad to have it.

Compact spare plus a small toolbox with scissor jack, extendable ratchet wrench, torque wrench, tire pump and puncture repair kit. Originally the plan was to put this in the car only when I expected to be out of cell service (any time I went for a twisty road drive) but I got used to having it and now it stays in the trunk permanently. I borrow the wife's SUV when I need to carry something big, and in two years there have been zero instances when removing the spare would mean I could use the car instead of borrowing the SUV.

[dradernh]

Originally Posted by MarcoZandrini

Homemade window cleaner:
60% water
20% distilled white vinegar
20% alcohol (70% alcohol is fine)
8 to 10 drops of Dawn in a 2l bottle containing the above. This stuff never streaks!

IIRC, I first saw that formula in the SF Chronicle back in the 80s. I found it to be a huge improvement over Windex.

[BMWHoosier]

Golf clubs, golf towel, golf shoes, car drying towel.