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Details
| Specification | Value |
|---|---|
| Brand | DELPHI |
| MPN | es21121-12b1 |
| Category | O2 Sensor |
| Cable Length [mm] | 373 mm |
OE/OEM numbers (4)
Search by this OE number to find compatible parts
- FORD—1306214
- FORD—1322705
- FORD—3M519F472BA
- FORD—3M519F472BB
Where this part fits
Original-fit position for OE 1322705. The red ring marks where this part installs on the vehicle.
About this product
Sourced from DELPHI, this o2 sensor (ES21121-12B1) combines precision engineering with durable materials to meet the demands of everyday driving and extended service intervals. Technical specifications — Cable Length [mm]: 373 mm, Oxygen Sensor: Aluminium, Oxygen Sensor: Rubber — are verified against the OEM data sheet to guarantee fitment accuracy and performance parity with the original equipment. Verified to fit FORD 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: 0 258 006 599, 0 258 986 777, 0893061, 10.8271 and 22 more. Matching these numbers confirms a like-for-like replacement with no loss of function. DELPHI 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 DELPHI
Delphi Technologies, with roots dating back to 1994 as part of General Motors, is a globally recognised supplier of fuel injection, ignition, and engine management systems. Delphi specialises in diesel injectors, fuel pumps, ignition coils, lambda sensors, and engine management components. As an OE supplier to major manufacturers worldwide, Delphi products are engineered to original factory specifications. With deep expertise in both petrol and diesel fuel systems, Delphi is the professional's choice for precision engine and fuel system components.
Suitable cars
Equivalent products (23)
Show all 23 OE numbers
O2 Sensor DELPHI ES21121-12B1 — compatible car models
| Car models | FORD: FOCUS C-MAX (DM2), FOCUS II (DA, HCP, DP), FOCUS II Saloon (DB, FCH, DH), FOCUS II Turnier (DA, FFS, DS) |
|---|---|
| Engines | 1.6; 1.4 |
| Year of manufacture | 2003-2013 |
| Manufacturer article number (MPN) | ES21121-12B1 |
| OE part numbers | 1306214, 1322705, 3M519F472BA, 3M519F472BB |
Compatibility check
Loading vehicle data…
Please wait while we load vehicle compatibility information.Description and what's included
DELPHI es21121-12b1 O2 Sensor. Cable Length [mm]: 373 mm. Oxygen Sensor: 2. 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 FORD 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 DELPHI O2 Sensor have?
This DELPHI O2 Sensor has the following specifications: Cable Length [mm]: 373 mm; Oxygen Sensor: 2; Oxygen Sensor: 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: 1306214, 1322705, 3M519F472BA, 3M519F472BB. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.
How much does a O2 Sensor cost?
This DELPHI O2 Sensor is available for £67.99. O2 Sensor prices vary depending on brand, specifications, and vehicle compatibility. DELPHI 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 1306214?
Yes, this DELPHI O2 Sensor is a direct replacement for OE part number 1306214. 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.
