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Denso 234-4409 - Oxygen Sensor
MPN: 234-4409
The Denso 234-4409 Oxygen Sensor enhances engine efficiency by measuring exhaust oxygen levels. Designed for specific Audi models, it ensures optimal air-fuel mixture.
Vehicle Specific
Check if this part fits your vehicle.
Product Overview
The Denso Oxygen Sensor 234-4409 is an essential component for maintaining the efficiency and performance of your Audi vehicle. Designed to meet or exceed OEM standards, this oxygen sensor provides accurate readings of exhaust oxygen levels, allowing your engine to optimize the air-fuel mixture for improved performance and reduced emissions. With a typical lifespan of 100,000 miles, Denso sensors are trusted by professionals and enthusiasts alike for their reliability and premium-grade construction. Choose Denso 234-4409 for dependable performance and peace of mind every time you service your vehicle.
Cross Reference Numbers
This Denso 234-4409 is equivalent to or replaces the following part numbers: 06E906265D, 13955, 25173, 250-24670, 350-34497.
Vehicle Compatibility
- Audi A4 3.2 V6 (2005–2006)
- Audi A4 Quattro 3.2 V6 (2005–2006)
- Audi A4 Quattro Avant 3.2 V6 (2005–2006)
- Audi A6 3.2 V6 (2011)
- Audi A6 Quattro 3.0 V6 (2009)
- Audi A6 Quattro Avant 3.0 V6 (2009)
This may also fit other applications. Please use the vehicle selector tool to verify fitment.
Why Shop at eEuroparts.com?
- Proven Expertise: Over 25 years of experience with European vehicles means we know your car inside and out.
- Exclusive Kits That Fitâ„¢ - complete repair solutions with no guesswork
- Fitment Confidence: Our accurate cataloging ensures you get the right part the first time.
- Fast, Reliable Shipping: Orders ship quickly from our U.S.-based warehouses.
- Transparent Pricing: Competitive prices with no hidden fees or surprise charges.
- Established Trust: Serving the European auto community since 2000.
Frequently Asked Questions
What does the Denso 234-4409 Oxygen Sensor do?
The Denso Oxygen Sensor measures the concentration of oxygen in the exhaust gases, helping the engine management system optimize the air-fuel mixture for efficient combustion. This results in improved fuel economy, reduced emissions, and better overall engine performance.
How do I know if my Oxygen Sensor needs replacement?
Common symptoms of a failing oxygen sensor include poor fuel economy, rough engine idle, increased emissions, and check engine light activation. If you notice any of these issues, it may be time to replace your oxygen sensor.
Can I install the Denso 234-4409 myself?
Yes, you can install the Denso 234-4409 yourself if you have basic automotive knowledge and tools. However, ensure to follow safety precautions and consult your vehicle's manual for specific instructions.
What are the symptoms of a faulty Oxygen Sensor?
Symptoms of a faulty oxygen sensor may include poor fuel efficiency, rough engine performance, increased emissions, and activation of the check engine light. If you see DTCs such as P0130, P0131, P0132, P0133, or P0134, it may indicate a failing oxygen sensor.
Why should I choose Denso for my Oxygen Sensor needs?
Denso is a trusted name in the automotive industry, providing high-quality components that meet or exceed OEM specifications. Order Denso 234-4409 today for a factory-correct replacement that restores safety and performance.
Note: All information on this page and in the FAQ is for general reference only. Verify fitment and consult a professional as needed. eEuroparts.com is not responsible for incorrect part selection or installation.
- BrandDenso
- ManufacturerDenso
- MPN234-4409
- Part TypeOxygen Sensor
- OE Part Numbers06E906265D
- Cross Reference Numbers2344409, 350-34497, 35034497, 250-24670, 25024670, 13955, 25173
- FeaturesConnector Gender : Male
Mounting Type : Threaded
Sensor Type : Heated
Thread Diameter : 0.708
Universal Or Specific Fit : Specific
Wire Quantity : 4
Wiring Harness Length : 38.19
- Fitment
- Fitment TypeVehicle Specific
| Year | Make | Model | Submodel | Notes |
|---|---|---|---|---|
| 2005 | Audi | A4 Quattro | Avant (3.2 V6 GAS) | Position: Downstream Left, Notes: O.E. Quality Direct Fit Replacement Sensor |
| 2005 | Audi | A4 Quattro | Base (3.2 V6 GAS) | Position: Downstream Left, Notes: O.E. Quality Direct Fit Replacement Sensor |
| 2006 | Audi | A4 | Base (3.2 V6 GAS) | Position: Downstream Left, Notes: To Chassis #8E-6-035 000, O.E. Quality Direct Fit Replacement Sensor |
| 2006 | Audi | A4 Quattro | Avant (3.2 V6 GAS) | Position: Downstream Left, Notes: To Chassis #8E-6-035 000, O.E. Quality Direct Fit Replacement Sensor |
| 2006 | Audi | A4 Quattro | Base (3.2 V6 GAS) | Position: Downstream Left, Notes: To Chassis #8E-6-035 000, O.E. Quality Direct Fit Replacement Sensor |
| 2009 | Audi | A6 Quattro | Avant (3.0 V6 GAS) | Position: Downstream, Engine: CAJA, Notes: Cylinder 4,5,6, O.E. Quality Direct Fit Replacement Sensor |
| 2009 | Audi | A6 Quattro | Base (3.0 V6 GAS) | Position: Downstream, Engine: CAJA, Notes: Cylinder 4,5,6, O.E. Quality Direct Fit Replacement Sensor |
| 2011 | Audi | A6 | Base (3.2 V6 GAS) | Position: Downstream, Notes: Cylinder 4,5,6, O.E. Quality Direct Fit Replacement Sensor |
Warranty Overview
At eEuroparts, we stand behind the quality of the products we sell. Every part we offer is backed by a warranty designed to give you peace of mind and protect your investment.
Standard Warranty – Most Parts
Coverage: 2 years or 24,000 miles (whichever comes first) from purchase date.
Protection: Defects in materials or workmanship under normal personal use.
Eligibility: Applies only to the original purchaser and the vehicle where the part was first installed.
Exclusions:
Wear-and-tear items (brake pads, filters, bulbs, wipers, etc.)
Commercial, fleet, rideshare, off-road, or racing use
Improper installation, misuse, accidents, or modifications
Not Covered: Labor, shipping, towing, or incidental costs.
Bison Performance Warranty – Our House Brand
Coverage: Limited Lifetime Warranty for as long as you own your vehicle.
Applies To: All products sold under the Bison Performance label.
Premium Protection: Goes beyond our standard warranty — if it’s a Bison product, the 2-year/24k mile limit is replaced with lifetime coverage.
Exclusions: Same as the standard warranty (normal wear, commercial use, improper installation, etc.).
What’s Included: Replacement of the defective product (labor and shipping excluded).
Warranty Claim Requirements
To keep claims fast and fair, we require:
Proof of purchase (invoice or order confirmation).
Photos or videos showing the defective part, order number, date, VIN, and odometer reading.
Diagnostic reports or part returns for non-visible issues may be requested.
Claims must be truthful, properly documented, and reflect normal consumer use.
Buy With Confidence: We back our products because we believe in their quality, with a transparent, customer-first warranty process you can trust. And with Bison Performance products, you’ll enjoy Limited Lifetime protection—an assurance few brands can match.
For full details and exclusions, please see our complete Warranty Terms & Conditions.
This summary is for convenience only. For full warranty coverage details, exclusions, and requirements, see our official Warranty Terms & Conditions. In case of conflict, the full policy governs.
Return Policy Overview
Most parts can be returned within 30 days of delivery if unused, uninstalled, and in original packaging.
To start a return, contact customer support via Chat or Contact Us.
Restocking fee: Up to 20% may apply for certain orders (buyer’s remorse, order errors, or special-order items)
Refunds: Issued to your original payment method within 3–5 business days after inspection
Exchanges: Not automatic — please return and reorder
Replacements: May be approved for incorrect or defective items reported within 7 days
Not returnable:
Used or installed parts
Electrical components
Opened filter kits, gaskets, or contaminated items
Final sale or custom orders
Important Notes:
Return shipping is your responsibility unless we made a verified error
Fitment is the customer’s responsibility (we can assist, but do not guarantee)
Country of origin may vary and is not grounds for return
For complete details, please see our full Return Policy.
This Returns summary is provided for convenience only. All returns, refunds, and exchanges are subject to the complete Returns Policy. In the event of any conflict, the full policy governs.
Fast, Reliable Shipping — Straight to Your Door
We ship most orders the same day when placed before 2 PM CST (Monday–Friday). Our main warehouse is just east of Nashville, TN, and we also ship from multiple locations nationwide to get your order to you as quickly as possible.
We use trusted carriers like UPS, FedEx, and USPS.
Tracking info is emailed to you as soon as your order ships.
Delivery estimates at checkout are based on carrier data, but not guaranteed.
Need help with a shipment?
If your order is missing, damaged, or incorrect, just let us know within 5 days of delivery. We’ll walk you through the quick claim process — including a few photos to help us make things right.
For complete details, please see our full Shipping Policy.
This Shipping summary is provided for convenience only. Delivery times, carrier terms, fees, restrictions, risk of loss, and other details are governed by our complete Shipping Policy. In the event of any conflict, the full policy governs.
