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Bosch 0261231040 - Ignition Knock (Detonation) Sensor
MPN: 0261231040
The Bosch 0261231040 Ignition Knock Sensor monitors engine vibrations to prevent detonation, ensuring optimal engine performance. Designed for select Audi models.
Vehicle Specific
Check if this part fits your vehicle.
Product Overview
The Bosch Ignition Knock (Detonation) Sensor, part number 0261231040, is designed specifically for Audi vehicles to detect engine knock or detonation. This premium-grade replacement sensor operates at OE-level quality, providing reliable signals to the engine control module (ECM) to adjust ignition timing and prevent potential engine damage. Its precise fitment ensures seamless integration within various Audi models, maintaining optimal engine performance. Choose Bosch 0261231040 for dependable performance and peace of mind every time you service your vehicle.
Cross Reference Numbers
This Bosch 0261231040 is equivalent to or replaces the following part numbers: 077905377A.
Vehicle Compatibility
- Audi A8 3.7 V8 (1997–1999)
- Audi A8 Quattro 4.2 V8 (1997–1999)
- Audi V8 Quattro 4.2 V8 (1990–1994)
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 Bosch 0261231040 Ignition Knock (Detonation) Sensor do?
The Bosch Ignition Knock (Detonation) Sensor monitors engine vibrations to detect knocking or detonation. By sending signals to the engine control module (ECM), it enables adjustments to ignition timing, preventing engine damage and ensuring optimal performance.
How do I know if my Ignition Knock (Detonation) Sensor needs replacement?
Common symptoms of a failing ignition knock sensor include engine knocking sounds, reduced engine performance, increased fuel consumption, check engine light illumination, and erratic engine behavior.
Can I install the Bosch 0261231040 myself?
Yes, the Bosch 0261231040 can be installed as a DIY project. However, ensure you follow the vehicle’s service manual for proper installation procedures and safety precautions.
What are the symptoms of a faulty Ignition Knock (Detonation) Sensor?
Symptoms of a faulty ignition knock sensor may include engine knocking sounds, poor acceleration, reduced fuel efficiency, and abnormal engine behavior. If you experience these issues, consider checking your sensor for proper function.
Why should I choose Bosch for my Ignition Knock (Detonation) Sensor needs?
Bosch is a trusted name in automotive parts, known for quality and reliability. Order Bosch 0261231040 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.
- BrandBosch
- ManufacturerBosch
- MPN0261231040
- Part TypeIgnition Knock (Detonation) Sensor
- OE Part Numbers077905377A
- FeaturesConnector Gender : Male
Connector Quantity : 1
Connector Shape : Rectangular
Material : Metal - Plastic
Mounting Type : Bolt On
Pulley Included : No
Solenoid Included : No
Terminal Gender : Male
Terminal Quantity : 2
Terminal Type : Blade
Wiring Harness Included : Yes
Wiring Harness Length : 916
- Fitment
- Fitment TypeVehicle Specific
| Year | Make | Model | Submodel | Notes |
|---|---|---|---|---|
| 1997 | Audi | A8 | Base (3.7 V8 GAS) | Notes: Color Code Brown, Left Side, Actual OE Part |
| 1997 | Audi | A8 Quattro | Base (4.2 V8 GAS) | Notes: Left Side, Color Code Brown, Actual OE Part |
| 1998 | Audi | A8 | Base (3.7 V8 GAS) | Notes: Color Code Brown, Left Side, Actual OE Part |
| 1998 | Audi | A8 Quattro | Base (4.2 V8 GAS) | Notes: Actual OE Part, Left Side, Color Code Brown |
| 1999 | Audi | A8 | Base (3.7 V8 GAS) | Notes: Color Code Brown, Actual OE Part, Left Side |
| 1999 | Audi | A8 Quattro | Base (4.2 V8 GAS) | Notes: Left Side, Color Code Brown, Actual OE Part |
| 1990 | Audi | V8 Quattro | Base (3.6 V8 GAS) | Notes: Actual OE Part, Color Code Brown |
| 1991 | Audi | V8 Quattro | Base (3.6 V8 GAS) | Notes: Actual OE Part, Color Code Brown |
| 1992 | Audi | V8 Quattro | Base (4.2 V8 GAS) | Notes: Actual OE Part, Color Code Brown |
| 1993 | Audi | V8 Quattro | Base (4.2 V8 GAS) | Notes: Color Code Brown, Actual OE Part |
| 1994 | Audi | V8 Quattro | Base (4.2 V8 GAS) | Notes: Actual OE Part, Color Code Brown |
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.
