According to the Haynes manual for 98 Toyota tacoma, and a mechanic i just visited, two. One on each side of catalytic converter.
correction, there are two sensors, the first is an air fuel ratio sensor, and the second is the oxegen sensor. i know cause i had to replace both of them.
opie909
2
It has 2 one for air in and one for air out
At least two.
The 2010 Toyota Tacoma has 16 valves.
The 2013 Toyota Tacoma has 16 valves.
The 2004 Toyota Tacoma has 16 valves.
The 2014 Toyota Tacoma has 16 valves.
The 2002 Toyota Tacoma has 16 valves.
The 2012 Toyota Tacoma has 16 valves.
The 2008 Toyota Tacoma has 16 valves.
The 2003 Toyota Tacoma has 16 valves.
The 2006 Toyota Tacoma has 16 valves.