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Oxygen Sensor Location

Oxygen Sensor Location

There are different locations in the exhaust system where O2sensors are positioned. The locations have been given numbers and will be used in the accompanying charts to identify the positions of O2sensors in most vehicles. Due to mid-year production changes or factory inconsistencies, all models may not be covered. If a vehicle being serviced is not covered in the charts, inspect the exhaust system in the general locations to find the applicable O2 sensors. NOTE: If equipped with dual exhaust systems, there may be up to 4 or 5 O2 sensors in the exhaust system. Be sure to locate all of them before commencing with any testing or service.
Manufacture Engine No. of Sensors Location
Acura Sport Utility
  3.2L 4 2, 5
  3.5L 4 2, 5
Chrysler
  2.4L 2 1, 4
  3.0L 2 1, 4
  3.3L 2 1, 4
  3.8L 2 1, 4
Dodge Ttucks and Van
  2.3L 2 1, 4
  2.5L 2 1, 4
  5.5L 2 1, 4
  5.2L 2 1, 4
  5.9L 2 1, 4
  5.9L HDC 4 2, 5
  8.0L HDC 4 2, 5
Ford Small Trucks and Van
  2.3L 2 1, 4
  2.5L 2 1, 4
  3.0L 3 2, 4
  4.0L (E) 4 2, 4
  4.0L (X) 4 2, 4
  5.0L 4 2, 4
Ford Minivans
  3.0L 4 2, 4
  3.8L 4 2, 4
Ford Full-size Trucks and Vans
  4.2L 2 3, 4
  4.6L 4 2, 4
  4.9L 1 1
  5.0L 3 2, 4
  5.4L 4 2, 4
  5.8L 3 2, 4
  6.8L 4 2, 4
  7.5L 4 2, 4
GM Small Trucks and Vans
  2.2L 2 1, 4
  4.3L 4 2, 5
GM Minivans
  3.4L 2 1, 4
GM Full-size Trucks and Vans
  4.3L 4 2, 5
  4.8L 4 2, 5
  5.0L 4 2, 5
  5.3L 4 2, 5
  5.7L 4 2, 5
  6.0L 4 2, 5
  7.4L 4 2, 5
Honda Sport Utility Vehicles
  2.0L 2 3, 4
  2.2L 2 3, 4
  2.6L 2 3, 4
  3.2L 4 2, 5
Infiniti Sport Utility Vehicles
  3.3L 4 2, 4
Izusu Sport Utility Vehicles
  2.0L 2 3, 4
  2.2L 2 3, 4
  2.6L 2 3, 4
  3.2L 4 2, 5
  3.5L 4 2, 5
  4.3L 4 2, 5
Jeep Sport Utility Vehicles
  2.5L 2 1, 4
  4.0L 2 1, 4
  4.7L 2 4, 5
  5.2L 3 1, 5
  5.9L 3 1, 5
Kia Sport Utility Vehicles
  2.0L 2 1, 4
Land Rover Sport Utility Vehicles
  4.0L 4 2, 4
  4.6L 4 2, 4
Lexus Sport Utility Vehicles
  3.0L 2 2, 4
  4.5L 2 1, 4
  4.7L 2 1, 4
Mazda Sport Utility Vehicles
  2.3L 2 1, 4
  2.5L 2 1, 4
  3.0L 3 2, 4
  4.0L 4 2, 4
Mazda Minivans
  3.0L 2 1, 4
Mercedes-Benz Sport Utility Vehicles
  3.2L 4 5
  4.3L 4 5
Mercury Sport Utility Vehicles
  3.0L 2 1, 4
  3.3L 2 1, 4
Mitsubishi Sport Utility Vehicles
  2.4L 2 1, 4
  3.0L 3 2, 4
  3.5L 3 2, 4
Nissan Sport Utility Vehicles
  2.4L 2 1, 4
  3.0L 4 2, 4
  3.3L 4 2, 4
Subaru Sport Utility Vehicles
  2.5L 3 3, 4
Suzuki Sport Utility Vehicles
  1.6L 2 1, 4
  1.8L 2 1, 4
  2.0L 2 1, 4
  2.5L 2 3, 4
Toyota Sport Utility Vehicles
  2.0L 2 1, 4
  2.4L 2 3, 4
  2.7L 2 3, 4
  3.0L 2 3, 4
  3.4L 2 3, 4
  4.5L 2 1, 4
  4.7L 4 1, 4

Fig. 1: Location No. 1 — Down pipe

Oxygen Sensor Location

Fig. 2: Location No. 1 — Typical O2 Sensor located in the exhaust manifold

Oxygen Sensor Location

Fig. 3: Location No. 2 — Left and right banks of a V-type engine

Oxygen Sensor Location

Fig. 4: Location No. 3 — Exhaust collector (where more than 1 pipe joins together)

Oxygen Sensor Location

Fig. 5: Location No. 4 — Outlet of the catalytic converter

Oxygen Sensor Location

Fig. 6: Location No. 5 — Inlet and outlet of the catalytic converter

Oxygen Sensor Location