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DENSO 2344052  
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DENSO 2344052 Specifications
Sensor TypeHeated
Wire Harness Length20.79 In.
Wire Quantity4
    Features & Benefits:
    Robotic Laser Weld - Ensures proper fit
    Porous PTFE Filter - Allows atmospheric oxygen to enter the sensor without permitting water or engine contaminants to seep into the casing.
    Double Protection Cover - Maintains proper unit temperature for quicker response times and protects the ceramic element against silicone and lead poisoning.
    Stainless Steel Housing - Resists corrosion and contamination with a rugged, watertight body and maximizes engine performance and fuel efficiency while reducing fuel consumption and harmful emissions
    Aluminum-Oxide Trap Layer - Keeps silicone and lead outside the ceramic element through DENSO's exclusive design, preventing damage to the platinum electrode.

    Engine Bank Identification

    An OBD Scan Tool will usually identify Oxygen (O2) Sensors by the Bank Number (B1 = Bank 1; B2 = Bank 2) and Sensor Number (S1 = Sensor 1; S2 = Sensor 2, etc.). Bank 1 is not on the same side of the engine for every vehicle.

    • Bank 1 will always contain Cylinder 1. To locate Cylinder 1,
      • Check for cylinder labels on spark plug wires
      • Look for the cylinder that is closest to the front of the engine
      • Refer to your Repair Manual (Found under 'Literature')
    • Bank 2 refers to the bank opposite Bank 1
    • Sensor 1 refers to the sensor before the catalytic converter
      • Other Common Terms: Upstream Sensor, Pre-Cat Sensor
    • Sensor 2+ typically refers to the sensor(s) after the catalytic converter
      • Other Common Terms: Downstream Sensor, Post-Cat Sensor
    Engine Bank Identification Engine Bank Identification
    Common O2 Sensor Locations

    Vehicle and part manufacturers sometimes use different terminology than diagnostic 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).

    Upstream Sensor (Before Converter)
    Downstream Sensor (After Converter)
    Left or Front Upstream Sensor (Before Converter)
    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.

    Common Causes:
    • Cracked or warped cylinder head
    • Leaking cylinder head gasket
    • Leaking intake manifold gasket
    Antifreeze Poisoned O2 Sensor
    Antifreeze Poisoned O2 Sensor
    Common Causes:
    • Use of an improper silicone gasket sealant on the engine

    Silicone Poisoned O2 Sensor
    Silicone Poisoned O2 Sensor
    Common Causes:
    • Clogged air filter
    • Leaking or defective fuel injector

    Carbon Buildup O2 Sensor
    Carbon Buildup O2 Sensor
Alternate/OEM Part Number(s): 8946539465, 8946539485, 8946539495, 8946539505, 8946539525, 8946539535, 8946539595, 8946539645, 8946539745

Warranty Information:
30 Days