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BMW 525i Emission Control Sensors
Emission control sensors for the BMW 525i span model years 1989–2010, covering oxygen sensors, mass air flow sensors, knock sensors, air/fuel ratio sensors, and throttle position sensors in direct-fit and OE replacement styles. Choose your model year above and this page keeps only the emission control sensors that fit your BMW 525i. Each listing is matched to our vehicle fitment data before it appears here.
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DENSO 234-4201 Universal Heated Oxygen Sensor 4-Wire 11.77" Lead
Part: 234-4201
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$84.98
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NGK 25613 Oxygen Sensor, 4-Wire Heated Narrow Band O2 Sensor, 18mm
Part: 25613
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$91.68
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NGK 24315 NTK Wideband Air Fuel Ratio Oxygen Sensor 5-Wire O2 Sensor
Part: 24315
Vehicle Specific
$157.70
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NGK 25658 NTK Oxygen Sensor O2 Sensor 4-Wire Heated 18mm Thread
Part: 25658
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$103.70
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NGK 25612 NTK OE Identical Oxygen Sensor 4-Wire Heated O2 Sensor
Part: 25612
Vehicle Specific
$90.39
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What's here for your BMW 525i
- Oxygen Sensors — manifold, rear, and flange positions in direct-fit and universal configurations
- Mass Air Flow Sensors — OE replacement and remanufactured units
- Ignition Knock (Detonation) Sensors — direct-fit replacements
- Air / Fuel Ratio Sensors — direct-fit and OE-style units
- Throttle Position Sensors — direct-fit replacements
The widest range of emission control sensors for the BMW 525i here comes from Walker Products, DENSO, Bosch, and Standard Motor Products. Other categories BMW 525i owners shop for: BMW 525i Springs and Suspension Parts, BMW 525i Exterior Lights and BMW 525i Brake Rotors and Drums, or browse all BMW 525i parts and accessories.