Auto 7 is America's leading supplier of Original Equipment (OE) quality parts for Hyundai, Kia, and Daewoo.
They enjoy a rich history in the OEM parts market as part of an international auto parts company in business since 1953. This history enables Auto 7 to offer reliable, convenient and affordable OEM replacement parts to best service your vehicle.
O2 Sensor Identification Guide
An OBD Scan Tool will usually identify Oxygen Sensors by the Bank Number (B1 = Bank 1) and Sensor Number (S1 = Sensor 1). Bank 1 will always contain Cylinder 1, which is located closest to the front of the engine.
Part manufacturers often use different terms than scan tools to identify sensor positions. Regardless of the vehicle's engine orientation, the right or left bank is determined by viewing the engine from the rear (opposite the drive belts).
A
Upstream Sensor (Before Converter)
B
Downstream Sensor (After Converter)
C
Left or Front Upstream Sensor (Before Converter)
D
Right or Rear Upstream Sensor (Before Converter)
Common O2 Sensor Contaminants
Oxygen (O2) Sensors commonly fail due to contamination. When checking or replacing an O2 Sensor, visually inspect the sensor body to determine if it has been contaminated by a faulty part or substance upstream, and correct the fault before replacing the sensor.
ANTIFREEZE POISONING
Common Causes:
Cracked or warped cylinder head
Leaking cylinder head gasket
Leaking intake manifold gasket
Antifreeze Poisoned O2 Sensor
SILICONE POISONING
Common Causes:
Use of an improper silicone gasket sealant on the engine
Closeout Inventory Warranty Information:Wholesaler Closeout items have a 30 day warranty (but still are covered by our Return Policy).AUTO 7 Regular Inventory Warranty Information:12 months/12000 miles. IMPORTANT A/C COMPRESSOR WARRANTY NOTE: 1) Replace the A/C Receiver Drier/Accumulator or desiccant element 2) Replace the A/C Expansion Valve 3) Replace any hose assembly containing a muffler 4) Perform a complete A/C system flush 5) Pull a vacuum on the closed system for the required amount of time to rid the system of any moisture. In the event that a warranty situation is called for, you will be required to supply written documentation verifying that the above work was performed by an ASE- certified mechanic/facility (actual copy of the Repair Order). No warranties will be considered without this required documentation.
O2 Sensor Identification Guide
Common O2 Sensor Contaminants
