Ok:

I help to keep things in place, but am fairly unique.

Not sure about that description lol

The filter strains the oil as it flows under pressure ;)

Now it makes sense. Lol.

That's a good point and clever use of words +1

Injectors

seatbelt

Nope to both.

Time for a clue I think.

I'm nearly always going round, but rarely turn on my own axis.

Speedo?

seatbelt

Lol, still not a seatbelt.

Split pin?

Nope.

I was trying to make it a bit harder by giving less away, but still didn't think it was that difficult, lol.

I guess it is easy when you know the answer

Nope.

I was trying to make it a bit harder by giving less away, but still didn't think it was that difficult, lol.

I guess it is easy when you know the answer

Yup for sure! I will have another think lol

Ok, so these are the clues we have just to make it easier for anyone reading

I help to keep things in place, but am fairly unique.

I'm nearly always going round, but rarely turn on my own axis.

Wheel nut?

Getting hot...

Focus on the last word of the first clue.

Locking wheel nut? Lol

Hurrah!

Your turn :)

I'll be back when I've thought of one. Lol.

good to see this thread is really taking off :D

I'm not in every car but every car has the same thing in principle. There is more than 1 of me. If 1 breaks I still work but not as good.

Spark plugs? Wild guess...

Sent from my iPad using Ford OC

Driver? lol.

j/k, I'll let someone else get this one anyway :)

Led's