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Details
| Specification | Value |
|---|---|
| Brand | TOPRAN |
| Category | O2 Sensor |
| Number of pins | 4 -pin connector |
OE/OEM numbers (1)
Search by this OE number to find compatible parts
- BMW—1178 7 506 539
Where this part fits
Original-fit position for OE 11787506539. The red ring marks where this part installs on the vehicle.
About this product
The TOPRAN O2 Sensor (503 092) is a professional-grade replacement component engineered for long service life and reliable operation across all conditions your vehicle encounters. The part is built to the following specification: Fitting Position: 178, Number of pins: Copper -pin connector, Connector Shape: 0, Oxygen Sensor: Steel. Each dimension is checked against the OEM reference to ensure the component seats and functions correctly first time. Verified to fit BMW 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: 0 258 005 271, 0 258 986 505, 0893236, 09SKV724 and 94 more. Matching these numbers confirms a like-for-like replacement with no loss of function. TOPRAN 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 from our UK warehouse with a 30-day money-back guarantee and free hassle-free returns.
About TOPRAN
TOPRAN, part of the Hans Thomsen Group headquartered in Hamburg, Germany, is a growing independent aftermarket brand focused on providing quality parts at accessible prices. TOPRAN offers a comprehensive range covering engine, cooling, electrical, braking, and body components for European vehicles. All TOPRAN products are manufactured to meet OE specifications and undergo quality testing before distribution. Combining German quality management with competitive pricing, TOPRAN is an excellent choice for cost-conscious motorists and workshops who do not want to compromise on part quality.
Suitable cars
Equivalent products (106)
Show all 106 OE numbers
O2 Sensor TOPRAN 503 092 — compatible car models
| Car models | BMW: 3 Compact (E46), 3 Convertible (E46), 3 Coupe (E46), 3 (E46), 3 Touring (E46), X5 (E53) |
|---|---|
| Engines | 316 ti; 318 Ci; 316 i; 4.4 i |
| Year of manufacture | 1997-2007 |
| Manufacturer article number (MPN) | 503 092 |
| OE part numbers | 1178 7 506 539 |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
TOPRAN 503092 O2 Sensor. Connector Shape: 0. Fitting Position: 178. Number of pins: 4 -pin connector. Oxygen Sensor: 1
- 1x O2 Sensor
Shipping, returns, warranty
Free UK delivery on orders over £99.00. Express and standard shipping available.
- Standard delivery: 2-5 business days
- Express delivery: 1-2 business days
- 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 BMW 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 TOPRAN O2 Sensor have?
This TOPRAN O2 Sensor has the following specifications: Fitting Position: 178; Number of pins: 4 -pin connector; Connector Shape: 0; Oxygen Sensor: 1. 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: 1178 7 506 539. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a O2 Sensor cost?
This TOPRAN O2 Sensor is available for £29.99. O2 Sensor prices vary depending on brand, specifications, and vehicle compatibility. TOPRAN 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 1178 7 506 539?
Yes, this TOPRAN O2 Sensor is a direct replacement for OE part number 1178 7 506 539. 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.
