Oxygen Sensor Downstream Air-Fuel Lambda for BMW E81-E93 X1
Oxygen Sensor Downstream Air-Fuel Lambda for BMW E81-E93 X1
Keep your BMW’s engine management precise with this downstream oxygen sensor from IWOKPHD. Designed to monitor the exhaust stream after the catalytic converter, it measures the downstream air–fuel ratio (lambda) and O2 levels to help the ECU optimize combustion, improve fuel efficiency, and reduce emissions. With a heating element for quick warm‑up and stable performance, this sensor is a reliable, direct‑fit replacement for many BMW models within the E81–E93 range, including X1 variants. Please check fitment before ordering, and if you’re unsure, contact us prior to purchase to avoid incorrect orders.
Benefits & Tips
- Restore accurate fuel mixture readings to help your engine idle smoothly, respond quickly, and run efficiently after sensor replacement.
- Direct‑fit design with a heating element ensures faster warm‑up and stable measurements across a range of operating conditions.
- Before installation, verify compatibility with your specific BMW model and engine (N46/B20 family). After installation, clear any related fault codes and monitor the sensor’s response to ensure correct lambda readings.
Product Specifications
- Brand Name: IWOKPHD
- Sensor Type: Piezoelectric
- Heating Type: Heating
- Measuring Range: Downstream Rear Probe Air Fuel Ratio Lambda O2
- OEM No. / Part Numbers: 11787570481, 11787570480, 11787544655, 11787545075, 11177913137, 7539137, A0015404617, A0015407617, A0025405617
- Model / Fitment (Overview): Compatible with BMW 1 Series (E81, E87, E88), 3 Series (E90, E93, E92, E91), and X1 (E84) with N46 B20 engines and related variants
- Origin: Mainland China
- Package Include: 1pcs x Oxygen Sensor
- Warranty: 1 year Replacement Warranty
- Shipping: All items will be sent out within 2 working days after payment is confirmed. Import duties, taxes and charges are not included in the item price or shipping charges. These charges are buyer's responsibility.
Fitment
Model compatibility covers BMW 1 Series (E81), 3 Series (E90, E93, E92, E91), and X1 (E84) with N46 B20 engines, including various 120i/320i configurations and related variants. Please note the exact engine code and model alignment when ordering to ensure a perfect fit.
Warnings / Reminders
- Please check the product picture and fitment before you order. If you are not sure, please contact us before placing the order; refunds for incorrect orders may not be available.
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