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Deal.ai › DENSO › Denso Oxygen Sensors
DENSO
DENSO Oxygen Sensor 234-4340

DENSO Oxygen Sensor 234-4340

Best price now

$120.26at WalmartChecked 1 h ago

15% under what the other stores charge

Compared across 14 stores. Prices are checked against each store and labelled with when.

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Price facts

  • Lowest price today: $120.26 at Walmart (checked Nov 12, 2026).
  • Checked at 14 stores.

Our take on the DENSO Oxygen Sensor 234-4340

The DENSO 234-4340 is a direct-fit oxygen sensor built to original-equipment standards. It uses DENSO's aluminum oxide trap layer to shield the ceramic sensing element from silicone and lead contamination, which helps protect sensor life and keep fuel trim accurate. It suits owners replacing a failed upstream or downstream sensor on vehicles that take this part number. Against generic sensors, the OE-style connector and calibrated element are the main draw; DENSO is a common original supplier, so fit and signal behavior match the factory part.

Best forOwners replacing a failed sensor with the factory-style partVehicles that list 234-4340 as the correct fitmentDrivers chasing a check-engine light for O2 heater or response codesKeeping fuel economy and emissions close to stock
Pros
  • Direct-fit design with OE-style connector
  • Aluminum oxide trap layer resists silicone and lead poisoning
  • Calibrated to original-equipment signal behavior
  • DENSO is a common factory supplier for oxygen sensors
  • Precision-built for exact replacement
Cons
  • Fitment is vehicle-specific; wrong part number means no fit
  • No universal wiring, so it only suits listed applications
  • Sensor life still depends on engine health and fuel quality

DENSO Oxygen Sensor 234-4340 prices at every store

  • WalmartNew

    In stock

    $120.26Free shippingChecked 1 h ago
    Visit Walmart
  • NAPA Auto PartsNew

    In stock

    $203.99Free shippingChecked 1 h ago
    Visit NAPA Auto Parts
  • PartsHawkNew

    In stock

    $199.68+ $17.40 shippingChecked 1 h ago
    Visit PartsHawk
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $120.26Free shippingChecked 1 h ago
    Visit Amazon
  • Sixity AutoNew

    Availability unknown

    $126.26Checked 1 h ago
    Visit Sixity Auto
  • SparkPlugs.com FamilyNew

    Availability unknown

    $127.57Checked 1 h ago
    Visit SparkPlugs.com Family
  • DENSOproductsNew

    Availability unknown

    $127.57Checked 1 h ago
    Visit DENSOproducts
  • Partsgeek.comNew

    Availability unknown

    $128.06Checked 1 h ago
    Visit Partsgeek.com
  • CARiD.comNew

    Availability unknown

    $141.45Checked 1 h ago
    Visit CARiD.com
  • eBayNew

    Availability unknownSold by goodtrust-autoparts

    $141.99Checked 1 h ago
    Visit eBay
  • AutoZoneNew

    Availability unknown

    $147.99Checked 1 h ago
    Visit AutoZone
  • CarParts.comNew

    Availability unknown

    $159.99Checked 1 h ago
    Visit CarParts.com
  • Zoro.comNew

    Availability unknown

    $162.99Checked 1 h ago
    Visit Zoro.com
  • Auto ValueNew

    Availability unknown

    $192.99Checked 1 h ago
    Visit Auto Value

Also available at

  • WalmartCheck price at Walmart

Store links may earn us a commission.

DENSO Oxygen Sensor 234-4340 price history

Lowest price we've seen: $120.26 on Nov 12 at Walmart. Tracked across 14 stores since Nov 12.

What reviewers say

Owners of DENSO oxygen sensors generally report the part fits and plugs in like the original and clears O2-related codes. Complaints center on wrong fitment when the part number is mismatched and on sensors that fail early in rare cases.

What people mention
  • FitmentPraisedOwners say the connector and threads match the factory sensor, so installation is straightforward.
  • Code fixPraisedBuyers report check-engine lights for oxygen sensor faults going away after replacement.
  • DurabilityMixedMost sensors last, but some owners report early failures.
  • Part numberCriticisedBuyers who order without checking fitment end up with a sensor that does not match their vehicle.

About the DENSO Oxygen Sensor 234-4340

The DENSO Oxygen Sensor 234-4340 is a replacement oxygen sensor. It is manufactured and tested to OE standards. Each component is built to match the original part for an exact replacement and a first-time fit.

It uses DENSO's aluminum oxide trap layer, which protects the ceramic element from silicone and lead poisoning. This protection is intended to support engine performance, fuel efficiency and longevity.

Brand
DENSO
Part number
234-4340
Color
Black
Size
1.880
Protection
Aluminum oxide trap layer shields the ceramic element from silicone and lead poisoning
Standards
Manufactured and tested to OE standards

Specifications

color
BlackSource
size
1.880Source

Questions and answers

Is the DENSO 234-4340 a direct fit?
Yes. It is built as an exact replacement with an OE-style connector, so no splicing is needed on vehicles that take this part number.
What does the aluminum oxide trap layer do?
It protects the ceramic sensing element from silicone and lead contamination, which can poison a sensor and skew its readings.
Upstream or downstream?
That depends on the vehicle. Check which position 234-4340 covers for your engine before ordering.
Will it clear my check-engine light?
If the code is for a failed oxygen sensor and this is the correct part, replacement usually clears it. Other faults will not be fixed by a new sensor.
Does it come with a connector?
Yes, it is supplied with the factory-style connector for plug-in installation.
Where is the DENSO Oxygen Sensor 234-4340 cheapest?
At Walmart, for $120.26, 15% under what the other stores charge, as of our latest check.
Where can I buy the DENSO Oxygen Sensor 234-4340?
14 stores we checked sell it, including Walmart, Amazon, Sixity Auto, SparkPlugs.com Family, DENSOproducts.

Stores we've priced the DENSO Oxygen Sensor 234-4340 at

  • Walmart deals and prices
  • Zoro deals and prices

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