Normally the left front as you look at the engine from the front of the car.
Need to know what engine it has.
Right side front. If you know where your starter is, the number 1 cylinder is right next to it.
The number 1 cylinder is the cylinder to the right when you open the hood.
Many Ford V-8's number 1 cylinder would be located on the passenger side bank most forward cylinder. It would be helpful to know which engine you have to be sure.
number 1 cylinder drivers side.
Number one cylinder is the rear one. Why, I don't know but that's what I've been told by a Yamaha mechanic
cylinder #1 is the first cylinder on the front of the engine
cylinder # 1 is the front cylinder on your straight 6
Number 1 is the cylinder closest to the timing belt. Mind you: Cylinder #1 is not the first cylinder to fire in the firing sequence.
On a 4-cylinder engine with a firing order of 1342, if number 1 cylinder is on the exhaust stroke, the number 3 cylinder will be on the induction stroke.
1 cylinder is #1, the first cylinder, front of engine, the first cylinder.
If you look at the distributor of the car, sometimes they are marked with the cylinder number on the cap. Find number 1 and follow the spark plug cable to the spark plug. That will be No. 1 cylinder.