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Details
| Specification | Value |
|---|---|
| Brand | FEBI BILSTEIN |
| Category | O2 Sensor |
| Weight [kg] | 0,095 kg |
| Cable Length [mm] | 710 mm |
| External Thread Size | M18 x 1.5 |
OE numbers (8)
Search by this OE number to find compatible parts
- AUDI—048 906 265 B
- AUDI—078 906 265
- AUDI—078 906 265 A
- AUDI—078 906 265 B
- AUDI—48 906 265 B
- AUDI—78 906 265
- AUDI—78 906 265 A
- AUDI—78 906 265 B
Where this part fits
Original-fit position for OE 078906265A. The red ring marks where this part installs on the vehicle.
About this product
Sourced from FEBI BILSTEIN, this o2 sensor (21434) combines precision engineering with durable materials to meet the demands of everyday driving and extended service intervals. Technical specifications — Weight [kg]: 0, 095 kg, Spanner Size: 22, Cable Length [mm]: 710 mm, Oxygen Sensor: Aluminium, Number of circuits: Cast Iron — are verified against the OEM data sheet to guarantee fitment accuracy and performance parity with the original equipment. Verified to fit AUDI models. All compatibility data is cross-checked against the TecDoc database — select your vehicle to confirm the part matches your specific engine and year. This part supersedes original equipment references: 010.3072, 0204, 0 258 003 281, 0 258 003 295 and 129 more. Matching these numbers confirms a like-for-like replacement with no loss of function. FEBI BILSTEIN is a recognised supplier of automotive replacement components to independent workshops and dealer networks across Europe. All parts are sourced from authorised distribution channels and carry full manufacturer traceability — you receive exactly the same component supplied to professional garages and dealer workshops. If fitment or specifications do not match your vehicle, our technical team can help identify the correct alternative — use the vehicle selector or contact us with your VIN for a guaranteed-fit recommendation. Replacing worn components on schedule preserves your vehicle's safety, reliability, and resale value — and aftermarket parts from established brands deliver OEM-equivalent performance at a fraction of the dealer price. Every part is dispatched with tracked delivery and a 14-day money-back guarantee with hassle-free returns.
About FEBI BILSTEIN
febi bilstein, founded in 1844 in Ennepetal, Germany, is one of the oldest and most comprehensive automotive parts suppliers in the independent aftermarket. febi bilstein offers over 40,000 parts spanning steering, suspension, engine, braking, cooling, and electrical systems. Certified to IATF 16949 and supplying OE-quality components, febi bilstein products undergo rigorous testing to match original equipment performance. With nearly 180 years of German engineering tradition, febi bilstein is the go-to brand for reliable, competitively priced replacement parts.
Suitable cars
Equivalent products (132)
Show all 132 OE numbers
O2 Sensor FEBI BILSTEIN 21434 — compatible car models
| Car models | AUDI: 100 C4 Avant (4A5), 100 C4 Saloon (4A2), 80 B4 Avant (8C5), 80 B4 Saloon (8C2), A6 C4 (4A2), A6 C4 Avant (4A5), A8 D2 (4D2, 4D8), CABRIOLET B3 (8G7), COUPE B3 (89, 8B3) |
|---|---|
| Engines | 2.6; 2.0; 1.6; 2.4; 2.8 |
| Year of manufacture | 1988-2005 |
| Manufacturer article number (MPN) | 21434 |
| OE part numbers | 048 906 265 B, 078 906 265, 078 906 265 A, 078 906 265 B, 48 906 265 B, 78 906 265, 78 906 265 A, 78 906 265 B |
Compatibility check
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Please wait while we load vehicle compatibility information.Description and what's included
FEBI BILSTEIN 21434 O2 Sensor. Cable Length [mm]: 710 mm. External Thread Size: M18 x 1,5. Number of circuits: 3. Oxygen Sensor: 2. Spanner Size: 22. Weight [kg]: 0,095 kg
- 1x O2 Sensor
Shipping, returns, warranty
Free UK delivery on orders over £99.00. Tracked standard shipping.
- Standard delivery: 5–9 business days
- Order before 5pm — ships the next working day
- Free returns within 14 days
- All parts backed by manufacturer warranty
Warranty: 12-month manufacturer warranty on all parts. 14-day money-back guarantee if the part doesn't fit your vehicle.
Frequently Asked Questions
Is this O2 Sensor compatible with my car?
This O2 Sensor fits AUDI vehicles. Use the vehicle selector at the top of the page to check exact compatibility — enter your car's make, model, and engine for a confirmed fitment match. All fitment data is verified through TecDoc.
What specifications does this FEBI BILSTEIN O2 Sensor have?
This FEBI BILSTEIN O2 Sensor has the following specifications: Weight [kg]: 0,095 kg; Spanner Size: 22; Cable Length [mm]: 710 mm; Oxygen Sensor: 2; Number of circuits: 3; External Thread Size: M18 x 1,5. Check the full specifications table above for complete details.
What OE part numbers does this O2 Sensor replace?
This O2 Sensor replaces OE part numbers: 048 906 265 B, 078 906 265, 078 906 265 A, 078 906 265 B, 48 906 265 B, 78 906 265, 78 906 265 A, 78 906 265 B. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a O2 Sensor cost?
This FEBI BILSTEIN O2 Sensor is available for £43.99. O2 Sensor prices vary depending on brand, specifications, and vehicle compatibility. FEBI BILSTEIN parts offer a balance of quality and value, backed by our 14-day money-back guarantee.
How do I know when to replace my O2 Sensor?
Symptoms include increased fuel consumption, rough idle, failed emissions test, check engine light, or reduced engine performance.
What tools do I need to replace a O2 Sensor?
Tools needed: lambda sensor socket wrench (22mm slotted), penetrating oil (apply 24 hours before removal on vehicles with high mileage or corrosion), oxygen sensor thread chaser, torque wrench (40-55 Nm), OBD-II scanner. Difficulty: Moderate DIY. Safety warning: Only remove on a fully cold exhaust. Apply penetrating oil the day before on older vehicles to avoid breaking the sensor in the bung -- a broken sensor requires professional extraction equipment.
Can I use this part as a replacement for OE 048 906 265 B?
Yes, this FEBI BILSTEIN O2 Sensor is a direct replacement for OE part number 048 906 265 B. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.
Related categories
Common OE numbers for this part
Common original equipment numbers linked to stocked alternatives.
