20 Best Denso 234-9021 Oxygen Sensor in 2023 Reviews and Buying Guide

3,585 Reviews Scanned

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1 Denso 234-9021 Upstream Heated Oxygen Sensor with 4-Wire Plug and 14.17” Harness Denso 234-9021 Upstream Heated Oxygen Sensor with 4-Wire Plug and 14.17” Harness
2 Denso 234-4725 Oxygen Sensor Denso 234-4725 Oxygen Sensor No ratings yet
3 Marsflex Air Fuel Ratio O2 Oxygen Sensor Upstream 234-9021 Compatible with Toyota 2000-2004 Avalon... Marsflex Air Fuel Ratio O2 Oxygen Sensor Upstream 234-9021 Compatible with Toyota 2000-2004... No ratings yet
4 Oxygen O2 Sensor Upstream 234-9021 Compatible with Lexus Es300 3.0L 2001-2002 Toyota Avalon Camry... Oxygen O2 Sensor Upstream 234-9021 Compatible with Lexus Es300 3.0L 2001-2002 Toyota Avalon Camry... No ratings yet
5 Oxygen O2 Sensor Upstream 234-9021 Compatible With Toyota Avalon 3.0L 2000-2004 Sienna Solara 3.0L... Oxygen O2 Sensor Upstream 234-9021 Compatible With Toyota Avalon 3.0L 2000-2004 Sienna Solara... No ratings yet
6 Denso 234-9041 Air Fuel Ratio Sensor Denso 234-9041 Air Fuel Ratio Sensor No ratings yet
7 DOSKJOK 234-9021 O2 Oxygen Sensor Air Fuel Ratio Upstream 250-54003 Compatible with Avalon 2000-2004... DOSKJOK 234-9021 O2 Oxygen Sensor Air Fuel Ratio Upstream 250-54003 Compatible with Avalon...
8 Denso 234-4137 Oxygen Sensor Denso 234-4137 Oxygen Sensor No ratings yet
9 Denso 234-4169 Oxygen Sensor Denso 234-4169 Oxygen Sensor
10 Denso 234-4622 Downstream Oxygen Sensor with 12” Harness and 4-Terminal Square Connector Denso 234-4622 Downstream Oxygen Sensor with 12” Harness and 4-Terminal Square Connector No ratings yet
11 Denso 234-9028 Oxygen Sensor (Air and Fuel Ratio Sensor) Denso 234-9028 Oxygen Sensor (Air and Fuel Ratio Sensor) No ratings yet
12 Denso 234-9062 Oxygen Sensor (Air and Fuel Ratio Sensor) Denso 234-9062 Oxygen Sensor (Air and Fuel Ratio Sensor) No ratings yet
13 Denso 234-4242 Oxygen Sensor Denso 234-4242 Oxygen Sensor No ratings yet
14 Denso 234-9072 Oxygen Sensor (Air and Fuel Ratio Sensor) Denso 234-9072 Oxygen Sensor (Air and Fuel Ratio Sensor)
15 Denso 234-4012 Oxygen Sensor, Original Version Denso 234-4012 Oxygen Sensor, Original Version No ratings yet
16 Denso 234-9002 Air Fuel Ratio Sensor Denso 234-9002 Air Fuel Ratio Sensor
17 Denso 234-4286 Oxygen Sensor Denso 234-4286 Oxygen Sensor No ratings yet
18 Denso 234-4621 Oxygen Sensor Denso 234-4621 Oxygen Sensor
19 Denso 234-9042 Air Fuel Ratio Sensor Denso 234-9042 Air Fuel Ratio Sensor No ratings yet
20 Denso 234-4800 Oxygen Sensor Denso 234-4800 Oxygen Sensor No ratings yet

SaleBestseller No. 1
Denso 234-9021 Upstream Heated Oxygen Sensor with 4-Wire Plug and 14.17” Harness
  • Manufactured to detect the amount of exhaust gas air fuel ratio
  • Constructed from durable material
  • Features zirconia solid electrolyte
  • Highly accurate
  • Easy installation
SaleBestseller No. 2
Denso 234-4725 Oxygen Sensor
  • Efficient Fuel Consumption
  • Easy installation
  • Constructed from high quality material
  • Manufactured with precision to meet OE standards
Bestseller No. 3
Marsflex Air Fuel Ratio O2 Oxygen Sensor Upstream 234-9021 Compatible with Toyota 2000-2004 Avalon...
  • 🔧Cautions: Please check your vehicle fitment carefully in the product description to avoid any wrong purchase. Please check your part pictures with...
  • 🔧Application: Marsflex Air Fuel Ratio Sensor 234-9021 fit for TOYOTA 2000-2004 Avalon 3.0L V6 2001 Camry 3.0L V6 2001-2003 Sienna 3.0L V6 2001-2003...
  • 🔧Advantage: Made of high-quality materials, strong durability, to ensure service life, Marsflex O2 Sensor can improve engine performance and fuel...
  • 🔧Easy Installation: Total length 16 inch. Manufactured to OE specification fit form and function, durable and easy installation
  • 🔧Warranty: 1-YEAR WARRANTY. ALL Marsflex oxygen sensors are extensively tested during manufacturing to guarantee quality, reliability, and above...
Bestseller No. 4
Oxygen O2 Sensor Upstream 234-9021 Compatible with Lexus Es300 3.0L 2001-2002 Toyota Avalon Camry...
  • 234-9021.
  • Easy Installation.
  • Fitment Info In The Product description.
  • Fast Shipment.
  • If you have any questions, please tell us .
Bestseller No. 5
Oxygen O2 Sensor Upstream 234-9021 Compatible With Toyota Avalon 3.0L 2000-2004 Sienna Solara 3.0L...
  • Part Number Fitment: 234-9021, 2349021, 8946741030, 89467-41030, 89467-41040, 8946741040, 8946733030, 89467-33030, 5S3572, OS1499, SG745, SG779,...
  • Please confirm your car model and the OE of the part before purchasing to avoid buying the wrong.
  • Please confirm your part picture before purchasing to avoid buying the wrong.
  • It could correctly replace the original part.
  • Thank you!
SaleBestseller No. 6
Denso 234-9041 Air Fuel Ratio Sensor
  • Manufactured to detect the amount of exhaust gas air fuel ratio
  • Constructed from durable material
  • Features zirconia solid electrolyte
  • Highly accurate
  • Easy installation
Bestseller No. 7
DOSKJOK 234-9021 O2 Oxygen Sensor Air Fuel Ratio Upstream 250-54003 Compatible with Avalon 2000-2004...
  • APPLICABLE MODELS - Air Fuel Ratio Sensor Upstream Compatible with ES300 2000-2001.
  • FIT VEHICLES - O2 Oxygen Sensor Upstream Sensor Heated Compatible with Avalon 2000-2004 3.0L V6/Camry 2001 3.0L V6 4-Speed AT/Sienna 2001-2003/Solara...
  • QUALITY & FUNCTION - DOSKJOK Oxygen Sensors are manufactured under rigorous scientific standards and 100% tested out of the factory.It is more...
  • INSTALL - Oxygen Sensors directly replace the old parts in the original position of the installation without change,easy to install on your vehicle,...
  • NOTES - Please carefully check your vehicle year & make & model,pictures and parts No to confirm the compatibility before purchasing. Please contact...
SaleBestseller No. 8
Denso 234-4137 Oxygen Sensor
  • Efficient Fuel Consumption
  • Easy installation
  • Constructed from high quality material
  • Manufactured with precision to meet OE standards
SaleBestseller No. 9
Denso 234-4169 Oxygen Sensor
  • Efficient Fuel Consumption
  • Easy installation
  • Constructed from high quality material
  • Manufactured with precision to meet OE standards
SaleBestseller No. 10
Denso 234-4622 Downstream Oxygen Sensor with 12” Harness and 4-Terminal Square Connector
  • Designed to detect the amount of oxygen in the exhaust system. The mounting type is threaded
  • Constructed from high quality material. The type of sensor is thimble and the thread diameter is 18mm
  • Features double protection layer, aluminum oxide trap layer, PTFE filter and stainless steel housing
  • Manufactured with precision to meet OE standards
  • Easy installation. Material- Zirconium
SaleBestseller No. 11
Denso 234-9028 Oxygen Sensor (Air and Fuel Ratio Sensor)
  • Manufactured to detect the amount of exhaust gas air fuel ratio
  • Constructed from durable material
  • Features zirconia solid electrolyte
  • Highly accurate
  • Easy installation
SaleBestseller No. 12
Denso 234-9062 Oxygen Sensor (Air and Fuel Ratio Sensor)
  • Manufactured to detect the amount of exhaust gas air fuel ratio
  • Constructed from durable material
  • Features zirconia solid electrolyte
  • Highly accurate
  • Easy installation
SaleBestseller No. 13
Denso 234-4242 Oxygen Sensor
  • Efficient Fuel Consumption
  • Package Dimensions: 14.986 L x 4.826 H x 5.588 W (centimeters)
  • Fit type: Vehicle Specific
  • Package Weight: 0.3 pounds
Bestseller No. 14
Denso 234-9072 Oxygen Sensor (Air and Fuel Ratio Sensor)
  • Manufactured to detect the amount of exhaust gas air fuel ratio
  • Constructed from durable material
  • Features zirconia solid electrolyte
  • Highly accurate
  • Easy installation
SaleBestseller No. 15
Denso 234-4012 Oxygen Sensor, Original Version
  • Designed to detect the amount of oxygen in the exhaust system
  • Constructed from high quality material.Connector Gender: Male
  • Features double protection layer, aluminum oxide trap layer, PTFE filter and stainless steel housing
  • Manufactured with precision to meet OE standards
  • Easy installation
Bestseller No. 16
Denso 234-9002 Air Fuel Ratio Sensor
  • Efficient Fuel Consumption.Material:Zirconium
  • Highly accurate
  • Easy installation
  • Constructed from durable material
SaleBestseller No. 17
Denso 234-4286 Oxygen Sensor
  • Designed to detect the amount of oxygen in the exhaust system
  • Constructed from high quality material
  • Features double protection layer, aluminum oxide trap layer, PTFE filter and stainless steel housing
  • Manufactured with precision to meet OE standards
  • Easy installation
SaleBestseller No. 18
Denso 234-4621 Oxygen Sensor
  • Designed to detect the amount of oxygen in the exhaust system
  • Constructed from high quality material
  • Features double protection layer, aluminum oxide trap layer, PTFE filter and stainless steel housing
  • Manufactured with precision to meet OE standards
  • Easy installation
SaleBestseller No. 19
Denso 234-9042 Air Fuel Ratio Sensor
  • Manufactured to detect the amount of exhaust gas air fuel ratio
  • Constructed from durable material
  • Features zirconia solid electrolyte
  • Highly accurate
  • Easy installation. The thread diameter is 18mm and the wire length is 302mm
SaleBestseller No. 20
Denso 234-4800 Oxygen Sensor
  • Efficient Fuel Consumption
  • Easy installation
  • Constructed from high quality material
  • Manufactured with precision to meet OE standards
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