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Details
| Specification | Value |
|---|---|
| Brand | TOPRAN |
| Category | O2 Sensor |
| Length [mm] | 440 mm |
| Number of pins | 4 -pin connector |
OE/OEM numbers (1)
Search by this OE number to find compatible parts
- CITROËN / PEUGEOT—1628 9W
Where this part fits
Original-fit position for OE 16289W. The red ring marks where this part installs on the vehicle.
About this product
Sourced from TOPRAN, this o2 sensor (721 857) combines precision engineering with durable materials to meet the demands of everyday driving and extended service intervals. Technical specifications — Fitting Position: 177, Length [mm]: 440 mm, Number of pins: Copper -pin connector, Oxygen Sensor: Rubber, Oxygen Sensor: 0 — are verified against the OEM data sheet to guarantee fitment accuracy and performance parity with the original equipment. Verified to fit CITROËN, PEUGEOT 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: 0 258 003 716, 0492, 071.004.011, 0893007 and 119 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 (136)
Show all 136 OE numbers
O2 Sensor TOPRAN 721 857 — compatible car models
| Car models | CITROËN: BERLINGO / BERLINGO FIRST Box Body/MPV (M), BERLINGO / BERLINGO FIRST MPV (MF, GJK, GFK), SAXO (S0, S1), XSARA Break (N2), XSARA (N1), ZX Break (N2), ZX (N2); PEUGEOT: 106 I (1A, 1C), 106 II (1A, 1C), 306 (7B, N3, N5), 306 Break (7E, N3, N5), 306 Convertible (7D, N3, N5), 306 Hatchback (7A, 7C, N3, N5), 405 II (4B), 405 II Break (4E), 406 (8B), 406 Break (8E/F) (+3 more) |
|---|---|
| Engines | 1.1 i (MAHDZ, MBHDZ, MBHFX); 1.1 i (MFHDZ, MFHFX); 1.0 X; 1.4 i; 1.0; 1.0 i; 1.1; 1.4; 1.6; 1.8 |
| Year of manufacture | 1991-2011 |
| Manufacturer article number (MPN) | 721 857 |
| OE part numbers | 1628 9W |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
TOPRAN 721857 O2 Sensor. Fitting Position: 177. Length [mm]: 440 mm. Number of pins: 4 -pin connector. Oxygen Sensor: 0. Oxygen Sensor: 5
- 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 CITROËN, PEUGEOT 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: 177; Length [mm]: 440 mm; Number of pins: 4 -pin connector; Oxygen Sensor: 5; Oxygen Sensor: 0. 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: 1628 9W. 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 £32.99. 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 1628 9W?
Yes, this TOPRAN O2 Sensor is a direct replacement for OE part number 1628 9W. 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.
