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Does anyone know the general location of the o2 sensor. Is it a one, two or three wire sensor? Hooking up an air/fuel and have misplaced my shop cd

thanks

chris

dazygirl415

There are two O2 sensors, one near the manifold and another near the cat. I believe it's a multiple wire sensor, but don't quote me on that.

305WANKEL

There Are Two Sensors, The Front One Is Located On Top Of The Manifold ( Header ) Which Is Extremely Hard To Loose Or To Get To, The Other One Is In The Cat - This One Is Easily Accesible By Just Lifting The Car.

dannobre

iTrader: (3)

The OEM WB is a current based sensor..you can't attach a normal voltage based sensor and expect to get any meaningful #'s.

Keef

my oem one got melted, where is the cheapest place too buy these?

O'Renesis

When you say "melted" what do you mean? The oem O2 sensor can only be purchased (new) from a Mazda spares dealer, i.e. Rosenthal Mazda etc etc, I suggest you check around for the best price. I purchased from the USA (with the help of a forum member) a replacement front O2 sensor for less than $190 + shipping, which is a fraction of the cost over here in Ireland/Europe.

NB. Front and rear O2 sensors are 4 wire type, also they are not interchangeable, i.e. cannot swap between front and rear sensors.

Keef

ya, I mean the rear o2 sensor. My Catalytic converter melted and melted the o2 while at it I guess...

dannobre

iTrader: (3)

Rear is cheap...about $130 I think...it is a narrowband type sensor