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Replacement and OEM Parts for BMW 525i Oxygen Sensor
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BMW 525i Oxygen Sensor

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Oxygen Sensors
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  • OEM BMW 525i Rear Oxygen Sensor Diagram - 11-78-7-544-655
    View Related Parts

    OEM (Genuine) BMW 525i Rear Oxygen Sensor

    PartNumber: 11-78-7-544-655
    OEM BMW 525i Rear Oxygen Sensor - 11-78-7-544-655
    Product Specifications
    • Other Names: Oxygen Sensor
    • Item Weight: 0.60 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: BMW 525i Rear Oxygen Sensor
    More Info
    $221.42 MSRP: $310.17
    You Save: $88.75 (29%)
  • Denso Air Fuel Ratio Sensor for BMW 525i - 234-5135

    Denso® Air Fuel Ratio Sensor for BMW 525i

    PartNumber: 234-5135
    Product Specifications
    • Connector Gender: Male
    • O2 Sensor Configuration: Direct Fit
    • Position: Upstream
    • Sensor Type: Heated
    • Thread Diameter: 0.71" (18 mm)
    • UPC: 042511116818
    • Wire Harness Length: 14.29" (363 mm)
    • Wires Quantity: 5 Wire Leads
    • Part Description: BMW 525i Air Fuel Ratio Sensor
    More Info
    $126.24
  • OEM BMW 525i Front Or Rear Upstream Oxygen Sensor Diagram - 11-78-1-742-050
    View Related Parts

    OEM (Genuine) BMW 525i Front Or Rear Upstream Oxygen Sensor

    PartNumber: 11-78-1-742-050
    OEM BMW 525i Front Or Rear Upstream Oxygen Sensor - 11-78-1-742-050
    Product Specifications
    • Other Names: Front Oxygen Sensor, Oxygen Sensor
    • Item Weight: 0.60 Pounds
    • Fitment Type: Direct Replacement
    • Replaces: 11-78-1-433-075, 11-78-1-742-049
    • Part Description: BMW 525i Front Or Rear Upstream Oxygen Sensor
    More Info
    $283.02 MSRP: $332.20
    You Save: $49.18 (15%)
  • Delphi Oxygen Sensor for BMW 525i - ES11081

    Delphi® Oxygen Sensor for BMW 525i

    PartNumber: ES11081
    Product Specifications
    • Connector Color: Black
    • Connector Shape: Square
    • Location: Manifold
    • Position: Front
    • Terminal Quantity: 5
    • Terminal Type: Blade
    • UPC: 689604213971
    • Wire Harness Length: 42" (1050 mm)
    • Wrench Size: 0.88" (22 mm)
    • Part Description: BMW 525i Oxygen Sensor
    More Info
    $146.36
  • Denso Air Fuel Ratio Sensor for BMW 525i - 234-5138

    Denso® Air Fuel Ratio Sensor for BMW 525i

    PartNumber: 234-5138
    Product Specifications
    • Connector Gender: Male
    • Location: Cylinder 4,5,6
    • O2 Sensor Configuration: Direct Fit
    • Position: Upstream
    • Sensor Type: Heated
    • Thread Diameter: 0.71" (18 mm)
    • UPC: 042511116849
    • Wire Harness Length: 46.85" (1190 mm)
    • Wires Quantity: 5 Wire Leads
    • Part Description: BMW 525i Air Fuel Ratio Sensor
    More Info
    $119.57
  • OEM BMW 525i Air Fuel Ratio O2 Oxygen Sensor Diagram - 11-78-7-558-055
    View Related Parts

    OEM (Genuine) BMW 525i Air Fuel Ratio O2 Oxygen Sensor

    PartNumber: 11-78-7-558-055
    OEM BMW 525i Air Fuel Ratio O2 Oxygen Sensor - 11-78-7-558-055
    Product Specifications
    • Other Names: Front Oxygen Sensor, Oxygen Sensor
    • Item Weight: 0.60 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: BMW 525i Air Fuel Ratio O2 Oxygen Sensor
    More Info
    $256.30 MSRP: $395.54
    You Save: $139.24 (36%)
  • Walker Products Wideband Premium Oxygen Sensor for BMW 525i - 250-25046

    Walker Products® Wideband Premium Oxygen Sensor for BMW 525i

    PartNumber: 250-25046
    Product Specifications
    • Connector Gender: Male
    • Location: Cylinder 4-6
    • Overall Length: 42.44"(1077.976 mm)
    • Position: Upstream Rear
    • Sensor Type: Heated
    • Thread Diameter: 0.71"(18.0 mm)
    • UPC: 724620018701
    • Wire Gauge Measurement: 20 Gauge
    • Wire Harness Length: 38.9"(988.06 mm)
    • Wires Quantity: 5 Wire Leads
    • Part Description: BMW 525i Wideband Premium Oxygen Sensor
    More Info
    $115.84
  • Delphi Oxygen Sensor for BMW 525i - ES20173

    Delphi® Oxygen Sensor for BMW 525i

    PartNumber: ES20173
    Product Specifications
    • Connector Shape: Round
    • Position: Rear
    • Terminal Quantity: 4
    • UPC: 689604147542
    • Wire Harness Length: 17.2" (430 mm)
    • Wrench Size: 0.88" (22 mm)
    • Part Description: BMW 525i Oxygen Sensor
    More Info
    $127.83
  • Denso Air Fuel Ratio Sensor for BMW 525i - 234-5139

    Denso® Air Fuel Ratio Sensor for BMW 525i

    PartNumber: 234-5139
    Product Specifications
    • Connector Gender: Male
    • O2 Sensor Configuration: Direct Fit
    • Position: Upstream Driver Side
    • Sensor Type: Heated
    • Thread Diameter: 0.71" (18 mm)
    • UPC: 042511116856
    • Wire Harness Length: 60.43" (1534.9 mm)
    • Wires Quantity: 5 Wire Leads
    • Part Description: BMW 525i Air Fuel Ratio Sensor
    More Info
    $106.85
  • Spectra Premium Oxygen Sensor for BMW 525i - OS5428

    Spectra Premium® Oxygen Sensor for BMW 525i

    PartNumber: OS5428
    Product Specifications
    • Connector Gender: Female
    • Connector Shape: Round
    • Installation Type: Screw
    • Overall Length: 60 3/16"
    • Sensor Type: Heated
    • Terminal Quantity: 4
    • Thread: M18 X 1.5 mm
    • UPC: 671607159387
    • Wrench Size: 0.88"(22 mm)
    • Part Description: BMW 525i Oxygen Sensor
    More Info
    $13.66
  • NTK OE Type Oxygen Sensor for BMW 525i - 25569

    NTK® OE Type Oxygen Sensor for BMW 525i

    PartNumber: 25569
    Product Specifications
    • Mounting Type: Threaded
    • Sensor Type: Heated
    • Thread Diameter: 18.000
    • Universal Or Specific Fit: Specific
    • UPC: 087295255698
    • Wire Quantity: 4
    • Wiring Harness Length: 13.7500
    • Part Description: BMW 525i OE Type Oxygen Sensor
    More Info
    $60.67
  • OEM BMW 525i Oxygen Sensor Diagram - 11-78-7-558-073
    View Related Parts

    OEM (Genuine) BMW 525i Oxygen Sensor

    PartNumber: 11-78-7-558-073
    OEM BMW 525i Oxygen Sensor - 11-78-7-558-073
    Product Specifications
    • Other Names: Front Oxygen Sensor, Rear Oxygen Sensor
    • Item Weight: 0.60 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: BMW 525i Oxygen Sensor
    More Info
    $256.30 MSRP: $395.54
    You Save: $139.24 (36%)
  • Walker Products Oxygen Sensor for BMW 525i - 350-35058

    Walker Products® Oxygen Sensor for BMW 525i

    PartNumber: 350-35058
    Product Specifications
    • Connector Gender: Male
    • Connector Shape: Radiused Polygon
    • Installation Type: Threaded
    • Location: Cylinders 1-3
    • Overall Length: 42.44"
    • Position: Upstream
    • Sensor Type: Heated
    • Thread Diameter: 18.0 mm
    • UPC: 724620095238
    • Wire Gauge Measurement: 20 Gauge
    • Wire Harness Length: 38.9"
    • Wires Quantity: 5 Wire Leads
    • Part Description: BMW 525i Oxygen Sensor
    More Info
    $79.29
  • Delphi Oxygen Sensor for BMW 525i - ES10914

    Delphi® Oxygen Sensor for BMW 525i

    PartNumber: ES10914
    Product Specifications
    • Connector Shape: Round
    • Position: Rear
    • Terminal Quantity: 4
    • UPC: 689604146828
    • Wire Harness Length: 40" (1000 mm)
    • Wrench Size: 0.88" (22 mm)
    • Part Description: BMW 525i Oxygen Sensor
    More Info
    $123.28
  • Denso Air Fuel Ratio Sensor for BMW 525i - 234-5137

    Denso® Air Fuel Ratio Sensor for BMW 525i

    PartNumber: 234-5137
    Product Specifications
    • Connector Gender: Male
    • O2 Sensor Configuration: Direct Fit
    • Position: Upstream
    • Sensor Type: Heated
    • Thread Diameter: 0.71" (18 mm)
    • UPC: 042511116832
    • Wire Harness Length: 38.66" (982 mm)
    • Wires Quantity: 5 Wire Leads
    • Part Description: BMW 525i Air Fuel Ratio Sensor
    More Info
    $112.43
  • Spectra Premium Oxygen Sensor for BMW 525i - OS5024

    Spectra Premium® Oxygen Sensor for BMW 525i

    PartNumber: OS5024
    Product Specifications
    • Connector Gender: Male
    • Connector Shape: Round
    • Installation Type: Screw
    • Overall Length: 40 1/2"
    • Position: Downstream
    • Sensor Type: Heated - Zirconia
    • Terminal Quantity: 4
    • Thread: M18 X 1.5 mm
    • UPC: 671607156720
    • Wrench Size: 0.88" (22 mm)
    • Part Description: BMW 525i Oxygen Sensor
    More Info
    $13.40
  • OEM BMW 525i Oxygen Sensor Diagram - 11-78-1-433-940
    View Related Parts

    OEM (Genuine) BMW 525i Oxygen Sensor

    PartNumber: 11-78-1-433-940
    OEM BMW 525i Oxygen Sensor - 11-78-1-433-940
    Product Specifications
    • Other Names: Front Oxygen Sensor
    • Item Weight: 0.60 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: BMW 525i Oxygen Sensor
    More Info
    $206.75 MSRP: $316.44
    You Save: $109.69 (35%)
  • Walker Products Wideband Premium Oxygen Sensor for BMW 525i - 250-25018

    Walker Products® Wideband Premium Oxygen Sensor for BMW 525i

    PartNumber: 250-25018
    Product Specifications
    • Connector Gender: Male
    • Location: Cylinder 1-3
    • Overall Length: 61.14"(1552.956 mm)
    • Position: Upstream Front
    • Sensor Type: Heated
    • Thread Diameter: 0.71"(18.0 mm)
    • UPC: 724620014031
    • Wire Gauge Measurement: 20 Gauge
    • Wire Harness Length: 57.6"(1463.04 mm)
    • Wires Quantity: 5 Wire Leads
    • Part Description: BMW 525i Wideband Premium Oxygen Sensor
    More Info
    $106.69
  • Delphi Oxygen Sensor for BMW 525i - ES20376

    Delphi® Oxygen Sensor for BMW 525i

    PartNumber: ES20376
    Product Specifications
    • Connector Shape: Round
    • Overall Length: 18.2" (455 mm)
    • Position: Rear Driver Side
    • Terminal Quantity: 4
    • UPC: 689604201749
    • Wire Harness Length: 17" (425 mm)
    • Wrench Size: 0.88" (22 mm)
    • Part Description: BMW 525i Oxygen Sensor
    More Info
    $104.08
  • Denso Oxygen Sensor for BMW 525i - 234-4473

    Denso® Oxygen Sensor for BMW 525i

    PartNumber: 234-4473
    Product Specifications
    • Connector Gender: Male
    • Installation Type: Screw
    • O2 Sensor Configuration: Direct Fit
    • Position: Downstream
    • Sensor Type: Heated
    • Thread Diameter: 0.71" (18 mm)
    • UPC: 042511116733
    • Wire Harness Length: 38.58" (979.9 mm)
    • Wires Quantity: 4 Wire Leads
    • Part Description: BMW 525i Oxygen Sensor
    More Info
    $89.66
  • Spectra Premium Oxygen Sensor for BMW 525i - OS5514

    Spectra Premium® Oxygen Sensor for BMW 525i

    PartNumber: OS5514
    Product Specifications
    • Connector Gender: Male
    • Connector Shape: Round
    • Installation Type: Screw
    • Overall Length: 41 1/2"
    • Position: Downstream
    • Sensor Type: Heated - Zirconia
    • Terminal Quantity: 4
    • Thread: M18 X 1.5 mm
    • UPC: 671607538991
    • Wrench Size: 0.88" (22 mm)
    • Part Description: BMW 525i Oxygen Sensor
    More Info
    $13.09
  • OEM BMW 525i O2 Oxygen Sensor Diagram - 11-78-7-544-654
    View Related Parts

    OEM (Genuine) BMW 525i O2 Oxygen Sensor

    PartNumber: 11-78-7-544-654
    OEM BMW 525i O2 Oxygen Sensor - 11-78-7-544-654
    Product Specifications
    • Other Names: Oxygen Sensor
    • Item Weight: 0.60 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: BMW 525i O2 Oxygen Sensor
    More Info
    $221.42 MSRP: $310.17
    You Save: $88.75 (29%)
  • Walker Products Oxygen Sensor for BMW 525i - 350-35078

    Walker Products® Oxygen Sensor for BMW 525i

    PartNumber: 350-35078
    Product Specifications
    • Connector Gender: Male
    • Connector Shape: Radiused Polygon
    • Installation Type: Threaded
    • Location: Cylinders 1-3
    • Overall Length: 61.14"
    • Position: Upstream
    • Sensor Type: Heated
    • Thread Diameter: 18.0 mm
    • UPC: 724620095436
    • Wire Gauge Measurement: 20 Gauge
    • Wire Harness Length: 57.6"
    • Wires Quantity: 5 Wire Leads
    • Part Description: BMW 525i Oxygen Sensor
    More Info
    $84.55
  • Delphi Oxygen Sensor for BMW 525i - ES10899

    Delphi® Oxygen Sensor for BMW 525i

    PartNumber: ES10899
    Product Specifications
    • Connector Shape: Round
    • Position: Front
    • Terminal Quantity: 4
    • UPC: 689604146774
    • Wire Harness Length: 18" (450 mm)
    • Wrench Size: 0.88" (22 mm)
    • Part Description: BMW 525i Oxygen Sensor
    More Info
    $82.86
  • OEM BMW 525i Oxygen Sensor Diagram - 11-78-1-730-007
    View Related Parts

    OEM (Genuine) BMW 525i Oxygen Sensor

    PartNumber: 11-78-1-730-007
    OEM BMW 525i Oxygen Sensor - 11-78-1-730-007
    Product Specifications
    • Item Weight: 0.60 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: BMW 525i Oxygen Sensor
    More Info
    $245.94 MSRP: $297.04
    You Save: $51.10 (18%)
  • Walker Products Wideband Premium Oxygen Sensor for BMW 525i - 250-25016

    Walker Products® Wideband Premium Oxygen Sensor for BMW 525i

    PartNumber: 250-25016
    Product Specifications
    • Connector Gender: Male
    • Location: Cylinder 1-3
    • Overall Length: 40.47"(1027.938 mm)
    • Position: Upstream
    • Sensor Type: Heated
    • Thread Diameter: 0.71"(18.0 mm)
    • UPC: 724620014017
    • Wire Gauge Measurement: 20 Gauge
    • Wire Harness Length: 36.93"(938.022 mm)
    • Wires Quantity: 5 Wire Leads
    • Part Description: BMW 525i Wideband Premium Oxygen Sensor
    More Info
    $110.52
  • Delphi Oxygen Sensor for BMW 525i - ES10857

    Delphi® Oxygen Sensor for BMW 525i

    PartNumber: ES10857
    Product Specifications
    • Connector Shape: Round
    • Position: Rear
    • Terminal Quantity: 4
    • UPC: 689604146675
    • Wire Harness Length: 39.6" (990 mm)
    • Wrench Size: 0.88" (22 mm)
    • Part Description: BMW 525i Oxygen Sensor
    More Info
    $71.27
  • OEM BMW 525i Oxygen Sensor - Front Manifold Diagram - 11-78-7-523-434
    View Related Parts

    OEM (Genuine) BMW 525i Oxygen Sensor - Front Manifold

    PartNumber: 11-78-7-523-434
    OEM BMW 525i Oxygen Sensor - Front Manifold - 11-78-7-523-434
    Product Specifications
    • Other Names: Oxygen Sensor
    • Item Weight: 0.60 Pounds
    • Fitment Type: Direct Replacement
    • Part Description: BMW 525i Oxygen Sensor - Front Manifold
    More Info
    $284.32 MSRP: $401.59
    You Save: $117.27 (30%)
  • Walker Products Oxygen Sensor for BMW 525i - 350-35081

    Walker Products® Oxygen Sensor for BMW 525i

    PartNumber: 350-35081
    Product Specifications
    • Connector Gender: Male
    • Connector Shape: Radiused Polygon
    • Installation Type: Threaded
    • Location: Cylinders 4-6
    • Overall Length: 40.47"
    • Position: Upstream
    • Sensor Type: Heated
    • Thread Diameter: 18.0 mm
    • UPC: 724620095467
    • Wire Gauge Measurement: 20 Gauge
    • Wire Harness Length: 36.93"
    • Wires Quantity: 5 Wire Leads
    • Part Description: BMW 525i Oxygen Sensor
    More Info
    $93.93
  • Denso Oxygen Sensor for BMW 525i - 234-4877

    Denso® Oxygen Sensor for BMW 525i

    PartNumber: 234-4877
    Product Specifications
    • Connector Gender: Female
    • Installation Type: Screw
    • O2 Sensor Configuration: Direct Fit
    • Position: Downstream Passenger Side
    • Sensor Type: Heated
    • Thread Diameter: 0.71" (18 mm)
    • UPC: 042511116764
    • Wire Harness Length: 17.13" (435.1 mm)
    • Wires Quantity: 4 Wire Leads
    • Part Description: BMW 525i Oxygen Sensor
    More Info
    $72.79
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