Click the image to expand

Denso Oxygen Sensor | 2344509

Lexus RX330 FWD, RX330 AWD, RX450h FWD, RX450h AWD
Toyota Highlander FWD, Highlander AWD, Highlander
$79.99
Reg
$83.32
List
$134.77
In Stock Status
In Stock Information Icon
Leaves warehouse within 1-2 business days.
Loading...

Make Sure It Fits

P/N: 2344509 Denso FREE SHIPPING
Cross References:
  • 2354509
  • W01331824935

Oxygen (O2) sensors are emissions control sensors that detect levels of oxygen in an engine's exhaust. When the element inside the O2 sensor heats up, oxygen flowing through the sensor causes the element to create electricity. This electrical current is sent to the engine's computer and converted to an oxygen level reading. Some O2 sensors are equipped with a heating element to speed up the oxygen-sensing process, while others rely on the engine's exhaust to heat them.

O2 sensors are one of the more commonly failed sensors in an emissions control system. Continuous exposure to exhaust temperatures ranging from 300°-700° Fahrenheit over time causes the sensor element to lose its ability to create voltage, making the sensor give incorrect readings. When this happens, the engine computer operates the fuel injectors on preset fault parameters and turns the check engine light on with a fault code. If an O2 sensor behind the catalytic converter fails, the ECM may turn on the check engine light with a fault code for the catalytic converter because the faulty O2 sensor reading gives the appearance that the catalytic converter is not functioning.

Failed O2 sensors will often result in a lack of engine power that is not usually noticed but a decrease in fuel economy, that is. If your check engine light is on and your vehicle is driving normally, you should still have the fault code checked, as it could very well be an O2 sensor that failed and is causing your vehicle to consume excessive fuel.

View more Denso O2 Sensors.

Denso is a worldwide leader in the manufacture of advanced automotive technology, systems, and components. They are OEM (original equipment manufacturer) on numerous powertrain, climate control, electronics, safety, and telematics for many different car and truck manufacturers around the world. Its aftermarket division of filters, spark plugs, and wipers are also built to OE specifications to ensure proper fitment and function.
Left = Driver side and Right = Passenger side.
All parts are priced individually unless identified as a set or kit. "Per car" notes identify how many of a given part your car has and "Left/Right or Front/Rear" notes means the part fits the left or right side of the car. These parts are still sold individually and you'll need to select the appropriate quantity if you plan to replace more than one of this item.

Frequently Viewed Together

We found 1 additional part(s) that are frequently viewed together.

Why Buy OEM & Genuine Replacement Auto Parts from AutohausAZ?

Auto parts at wholesale prices is what you will find at AutohausAZ. Have you been searching the web for auto parts for your vehicle? You have come to the right place! Here at Autohaus, we strive to offer low prices on quality replacement parts and providing first rate customer service.

What This Denso Oxygen Sensor Fits?

Application information below is for reference only and should not be used to determine the exact vehicle fitment. Please use the "Make Sure It Fits" vehicle selection box above to determine the exact fitment and review any application notes. If you need any help determining if this part works with your vehicle, please don't hesitate to contact us.

Lexus
04-06 - RX330 AWD
Downstream Right ~ DENSO is the O.E. Manufacturer / Oxygen Sensor
04-06 - RX330 FWD
Downstream Right ~ DENSO is the O.E. Manufacturer / Oxygen Sensor
10-13 - RX450h AWD
Downstream Right ~ DENSO is the O.E. Manufacturer / Oxygen Sensor
10-13 - RX450h FWD
Downstream Right ~ DENSO is the O.E. Manufacturer / Oxygen Sensor
Toyota
11-12 - Highlander Hybrid, Hybrid Limited
Downstream Left ~ DENSO is the O.E. Manufacturer / Oxygen Sensor; Fuel Type: ELECTRIC/GAS
04-04 - Highlander Limited
Downstream Right ~ DENSO is the O.E. Manufacturer / Oxygen Sensor
11-12 - Highlander AWD Base, Limited, SE
Downstream Left ~ DENSO is the O.E. Manufacturer / Oxygen Sensor; Fuel Type: ELECTRIC/GAS
04-05 - Highlander AWD Base, Limited
Downstream Right ~ DENSO is the O.E. Manufacturer / Oxygen Sensor
06-07 - Highlander AWD Base, Hybrid, Hybrid Limited, Limited, Sport
Downstream Right ~ DENSO is the O.E. Manufacturer / Oxygen Sensor; Fuel Type: GAS
09-12 - Highlander AWD Base, SE
Downstream ~ O.E. Quality Replacement Sensor
08-09 - Highlander AWD Base, Limited, Sport
Rear Right ~ 4 Wire 650mm wire length Heated Located after converter w/ OE connector; Fuel Type: GAS
13-13 - Highlander AWD Base, Plus
Rear ~ 4 Wire 650mm wire length Heated L4 Located after converter w/ OE connector
11-12 - Highlander FWD Base, Limited, SE
Downstream Left ~ DENSO is the O.E. Manufacturer / Oxygen Sensor; Fuel Type: ELECTRIC/GAS
04-05 - Highlander FWD Base, Limited
Downstream Right ~ DENSO is the O.E. Manufacturer / Oxygen Sensor
06-07 - Highlander FWD Base, Hybrid, Hybrid Limited, Limited, Sport
Downstream Right ~ DENSO is the O.E. Manufacturer / Oxygen Sensor; Fuel Type: GAS
09-12 - Highlander FWD Base, SE
Downstream ~ O.E. Quality Replacement Sensor
08-09 - Highlander FWD Base, Limited, Sport
Rear Right ~ 4 Wire 650mm wire length Heated Located after converter w/ OE connector; Fuel Type: GAS
13-13 - Highlander FWD Base, Plus
Rear ~ 4 Wire 650mm wire length Heated L4 Located after converter w/ OE connector