Water down the car, scrub it down with a washing brush and some soapy water, rinse it off, then dry it off.
Theres four o2 sensors in this particular bmw. Two before and two after the cat converters.
4
Some 323 bmw's in the E36 platform only have 2 O2 Sensors, 1 pre cat and 1 post cat, unlike other BMW's that actually have 2 on the exhaust manifolds (1 per manifold) and two sensors at the cat for a total of 4 sensors. This might be a bit confusing but BMW went with a simpler design on the 323 E36 I don't know why.
You must replace the brake pad sensors inside or on the rear calipers... usually that is the reason why a brake service is more expensive on a bmw. all due to sensors and the availability of those sensors
4, one per wheel
On the exhaust pipe 1 before the cat and 1 after
There are four speed sensors on a 99 BMW 328i. One sensor is located on each of the four wheels.
you cant need to do sencors to sorry
The O2 sensor is in the exhaust pipe before the catalytic converter.
there are 2 pre and two after
also, are any special tools required?
4. 2 pre cat, 2 post.