20 Best Denso 234-9021 Oxygen Sensor in 2024 Reviews and Buying Guide

1,624 (rnd) 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 No ratings yet
2 DrCax 234-9021 Oxygen O2 Sensor Upstream Heated Air Fuel Ratio Compatible with Toyota Avalon... DrCax 234-9021 Oxygen O2 Sensor Upstream Heated Air Fuel Ratio Compatible with Toyota Avalon... No ratings yet
3 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
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 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
6 Replacement Oxygen Sensor Upstream - Replaces 234-9021, 8946741030, 8946741040 - Compatible with... Replacement Oxygen Sensor Upstream - Replaces 234-9021, 8946741030, 8946741040 - Compatible with... No ratings yet
7 NECATUO 234-9021 Upstream O2 Oxygen Sensor Heated Air Fuel Ratio Compatible with Toyota Avalon... NECATUO 234-9021 Upstream O2 Oxygen Sensor Heated Air Fuel Ratio Compatible with Toyota Avalon... No ratings yet
8 YDYKPOWER OE 234-9021 Air Fuel Ratio Oxygen Sensor Upstream, Automotive Replacement O2 Sensors... YDYKPOWER OE 234-9021 Air Fuel Ratio Oxygen Sensor Upstream, Automotive Replacement O2 Sensors... No ratings yet
9 Denso 234-4260 Oxygen Sensor Denso 234-4260 Oxygen Sensor No ratings yet
10 Denso 234-4621 Oxygen Sensor Denso 234-4621 Oxygen Sensor
11 Denso 234-4623 Downstream Oxygen Sensor with 23” 4-Wire Square Plug Harness for Calif. Equip Denso 234-4623 Downstream Oxygen Sensor with 23” 4-Wire Square Plug Harness for Calif. Equip No ratings yet
12 Denso 234-4233 Downstream Oxygen Sensor for Toyota 1.8L with 4-Wire 21” Harness Denso 234-4233 Downstream Oxygen Sensor for Toyota 1.8L with 4-Wire 21” Harness No ratings yet
13 Denso 234-9052 Air Fuel Ratio Sensor Denso 234-9052 Air Fuel Ratio Sensor
14 Denso 234-4673 Oxygen Sensor (Air and Fuel Ratio Sensor) Denso 234-4673 Oxygen Sensor (Air and Fuel Ratio Sensor) No ratings yet
15 Denso 234-9051 Right-Bank Upstream with 4-Wire 8.5” Option Air Fuel Ratio Oxygen Sensor Denso 234-9051 Right-Bank Upstream with 4-Wire 8.5” Option Air Fuel Ratio Oxygen Sensor No ratings yet
16 Denso 234-4593 Oxygen Sensor Denso 234-4593 Oxygen Sensor No ratings yet
17 Denso 234-4061 Oxygen Sensor Denso 234-4061 Oxygen Sensor No ratings yet
18 Denso 234-4189 Oxygen Sensor Denso 234-4189 Oxygen Sensor No ratings yet
19 Denso 234-9005 Oxygen Sensor Denso 234-9005 Oxygen Sensor

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
Bestseller No. 2
DrCax 234-9021 Oxygen O2 Sensor Upstream Heated Air Fuel Ratio Compatible with Toyota Avalon...
  • [PRECAUTIONS PURCHASE]: Please use Amazon's Your Garage function and verify the fitment of the autopart by the year/make/model of your vehicle and the...
  • [SOLUTION]: Improve engine efficiency performance and fuel economy.Reduce CO2 and other harmful emission.
  • [OE STANDARD]: All of the DrCax oxygen sensors are built to achieve or exceed OE specifications, subject to strict quality control testing. Every...
  • [REPLACEMENT PART NUMBER]:234-9021, 89467-33030, 89467-41030, 89467-41040, 89467-42020, 8946733030, 8946741030, 8946741040, 2131483, 25054003,...
  • [BUY WITH CONFIDENCE]: DrCax oxygen sensors comes complete with a One year warranty.If the sensor ever fails on your car,simply contact us for a...
Bestseller No. 3
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!
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.
  • Thank you!
  • If you have any questions, please tell us .
Bestseller No. 5
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 our...
  • 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 all,...
Bestseller No. 6
Replacement Oxygen Sensor Upstream - Replaces 234-9021, 8946741030, 8946741040 - Compatible with...
  • Replacement Upstream Oxygen Sensor - Sometimes referred to as O2 or Lambda Sensor measures the amount or proportion of oxygen mixed in the fuel of...
  • Compatible Replacement for Toyota Vehicles - 2000-2001 ES300 3.0L | 2000-2004 Avalon 3.0L | 2001 Camry 3.0L | 2001-2003 Sienna 3.0L | 2001-2003 Solara...
  • Replaces Part# 234-9021, 8946741030, 8946741040, 8946733030, 5S3572 ​usually found on popular Avalon, Camry, and Sienna including year models 00,...
  • OEM Fit, Quality, Finish - This replacement 02 Oxygen Sensor is a direct replacement for the Oxygen Sensor part# 234-9021 and will fit, work and...
  • Lifetime Warranty - This replacement Oxygen Sensor from AA Ignition comes complete with a lifetime warranty. If the part ever fails on your ES300,...
Bestseller No. 7
NECATUO 234-9021 Upstream O2 Oxygen Sensor Heated Air Fuel Ratio Compatible with Toyota Avalon...
  • Vehicle Fitment (234-9021 Upstream,Set of 1): Please check Amazon Fitment Filter and Description to see if this item will work on your vehicle before...
  • Reference Number (234-9021 Upstream,Set of 1) (Part Number or OE Number): 234-9021, 89467-33030, 89467-41030, 89467-41040, 89467-42020, 8946733030,...
  • OEM Quality (234-9021 Upstream,Set of 1): Crafted from premium materials with exceptional durability, the NECATUO O2 Sensor guarantees a prolonged...
  • Easy Installation (234-9021 Upstream,Set of 1): Manufactured to exact OE specifications for perfect fit, form, and function, our products are built to...
  • Warranty: 1-YEAR WARRANTY. ALL NECATUO oxygen sensors undergo rigorous testing during the manufacturing process to ensure superior quality, utmost...
Bestseller No. 8
YDYKPOWER OE 234-9021 Air Fuel Ratio Oxygen Sensor Upstream, Automotive Replacement O2 Sensors...
  • Oxygen Sensor Replace Part Number: OE 234-9021, 2349021, 89467-41030, 8946741030, 89467-41040, 8946741040, 89467-33030, 8946733030, 5S3572, OS1499....
  • Compatible with Vehicle Model: Ydykpower oem oxygen o2 sensor 234-9021 compatible with 2000-2004 for Toyota-Avalon 3.0L Upstream, for 2001-2003 Sienna...
  • Oxygen O2 Sensor: Bank 1 Sensor 1=Upstream(Right/Rear); Bank 2 Sensor 1=Upstream(Left/Front); Bank 1 Sensor 2=Downstream(Right/Rear); Bank 2 Sensor...
  • Automotive Replacement Oxygen Sensor: The YDYKPOWER O2 sensor can replaces for the existing worn-out or malfunctioning old oxygen sensor directly,...
  • About YDYKPOWER: We are a professional automotive leader in premium aftermarket oxygen sensors. Our journey began with a vision to empower drivers...
SaleBestseller No. 9
Denso 234-4260 Oxygen Sensor
  • Designed to detect the amount of oxygen in the exhaust system
  • Constructed from high quality material. Connector Type: OE Type
  • 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. 10
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
Bestseller No. 11
Denso 234-4623 Downstream Oxygen Sensor with 23” 4-Wire Square Plug Harness for Calif. Equip
  • Efficient Fuel Consumption
  • Easy installation
  • Constructed from high quality material
  • Manufactured with precision to meet OE standards
Bestseller No. 12
Denso 234-4233 Downstream Oxygen Sensor for Toyota 1.8L with 4-Wire 21” Harness
  • Efficient Fuel Consumption
  • 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
Bestseller No. 13
Denso 234-9052 Air Fuel Ratio Sensor
  • Efficient Fuel Consumption
  • Highly accurate
  • Easy installation
  • Constructed from durable material
Bestseller No. 14
Denso 234-4673 Oxygen Sensor (Air and Fuel Ratio 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
Bestseller No. 15
Denso 234-9051 Right-Bank Upstream with 4-Wire 8.5” Option Air Fuel Ratio Oxygen Sensor
  • Manufactured to detect the amount of exhaust gas air fuel ratio.Material:Zirconium
  • Constructed from durable material
  • Features zirconia solid electrolyte
  • Highly accurate; Thread Diameter: 18mm
  • Easy installation
Bestseller No. 16
Denso 234-4593 Oxygen Sensor
  • Package Dimensions: 5.75 L x 2.19 H x 1.88 W (inches)
  • Package Weight : 0.25 pounds
  • Country of Origin : China
  • Fit type: Vehicle Specific
Bestseller No. 17
Denso 234-4061 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.Connector Gender: Male
  • Manufactured with precision to meet OE standards
  • Easy installation
Bestseller No. 18
Denso 234-4189 Oxygen Sensor
  • Efficient Fuel Consumption
  • Easy installation
  • Constructed from high quality material
  • Manufactured with precision to meet OE standards
Bestseller No. 19
Denso 234-9005 Oxygen Sensor
  • Efficient Fuel Consumption
  • Highly accurate
  • Easy installation
  • Constructed from durable material
  • Fitment Details: Acura - RSX 2002-2004; Honda - Civic 2001-2005, CR-V 2002-2004
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