BMW 740i 2008-2015 Emissions & Sensors Specifications
Comprehensive technical documentation for the emissions sensors in the 2008-2015 BMW 740i, including O2 sensors, NOx sensors, and particulate matter sensors. Covers sensor functionality, integration with the ECU, and diagnostic procedures.
Overview Specifications
Comprehensive description of the emissions_sensors specifications for the 2008-2015 BMW 740I, including key features, measurements, and technical details
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Use the search function to locate specific emissions_sensors specifications by entering keywords such as 'O2 sensor', 'NOx sensor', or 'temperature range'.
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Key Specifications
O2 Sensor Operating Range
-40°C to 900°C
NOx Sensor Measurement Range
0-2500 ppm
EGT Sensor Accuracy
±2% of reading
MAF Sensor Measurement Range
0-500 kg/h
Ambient Temperature Sensor Accuracy
±1°C
Available Specifications
Oxygen (O2) Sensors
Details about the oxygen sensors used in the 2008-2015 BMW 740I, including their role in emissions control and technical specifications.
Oxygen (O2) Sensors
Details about the oxygen sensors used in the 2008-2015 BMW 740I, including their role in emissions control and technical specifications.
Front O2 Sensor Specifications
- Location: Pre-catalytic converter
- Operating temperature range: -40°C to 900°C
- Output signal: 0.1V to 0.9V
- Response time: <100ms
- Heater resistance: 6-10 ohms
Rear O2 Sensor Specifications
- Location: Post-catalytic converter
- Operating temperature range: -40°C to 800°C
- Output signal: 0.1V to 0.9V
- Response time: <150ms
- Heater resistance: 6-10 ohms
Note: Rear O2 sensors are primarily used for monitoring catalytic converter efficiency.
Nitrogen Oxide (NOx) Sensors
Technical details about the NOx sensors in the 2008-2015 BMW 740I, including their function and specifications.
Nitrogen Oxide (NOx) Sensors
Technical details about the NOx sensors in the 2008-2015 BMW 740I, including their function and specifications.
NOx Sensor Specifications
- Location: Downstream of the SCR catalyst
- Operating temperature range: -40°C to 500°C
- Measurement range: 0-2500 ppm
- Accuracy: ±5% of reading
- Heater power consumption: 12W
NOx Sensor Diagnostics
- Self-diagnostic capability: Yes
- Fault detection: Over-range, under-range, and heater faults
- Communication protocol: CAN bus
- Replacement interval: 100,000 miles or as needed
Note: NOx sensors are critical for ensuring compliance with emissions standards.
Temperature Sensors
Information about the temperature sensors used in the emissions system of the 2008-2015 BMW 740I.
Temperature Sensors
Information about the temperature sensors used in the emissions system of the 2008-2015 BMW 740I.
Exhaust Gas Temperature (EGT) Sensors
- Location: Upstream and downstream of the catalytic converter
- Operating temperature range: -40°C to 1000°C
- Accuracy: ±2% of reading
- Response time: <200ms
- Output signal: 0-5V analog
Ambient Temperature Sensors
- Location: Near the air intake
- Operating temperature range: -40°C to 120°C
- Accuracy: ±1°C
- Response time: <500ms
- Output signal: 0-5V analog
Note: Ambient temperature sensors help optimize fuel-air mixture for emissions control.
Mass Air Flow (MAF) Sensors
Details about the MAF sensors in the 2008-2015 BMW 740I, including their role in emissions management.
Mass Air Flow (MAF) Sensors
Details about the MAF sensors in the 2008-2015 BMW 740I, including their role in emissions management.
MAF Sensor Specifications
- Location: Between the air filter and throttle body
- Measurement range: 0-500 kg/h
- Accuracy: ±2% of reading
- Operating voltage: 12V DC
- Output signal: 0-5V analog
MAF Sensor Diagnostics
- Self-diagnostic capability: Yes
- Fault detection: Over-range, under-range, and signal drift
- Communication protocol: CAN bus
- Replacement interval: 75,000 miles or as needed
Note: MAF sensors are essential for maintaining optimal air-fuel ratios.
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Component Specifications
Oxygen Sensors
- Part Number
- 11787558025
- Type
- Planar Zirconia
- Location
-
- Upstream (pre-catalytic converter)
- Downstream (post-catalytic converter)
- Operating Temperature
- 300°C to 850°C
- Response Time
- less than 100 ms
- Voltage Range
- 0.1V to 0.9V
- Tolerance
- ±0.02V
Nitrogen Oxide Sensors
- Part Number
- 11747837945
- Type
- NOx Sensor
- Location
- Downstream of SCR catalyst
- Operating Temperature
- 200°C to 900°C
- Measurement Range
- 0 ppm to 1000 ppm
- Accuracy
- ±5 ppm
- Response Time
- less than 500 ms
Mass Air Flow Sensor
- Part Number
- 13627563147
- Type
- Hot Film Air Mass Sensor
- Location
- Intake air duct
- Measurement Range
- 0 kg/h to 600 kg/h
- Accuracy
- ±2%
- Operating Temperature
- -40°C to 120°C
- Output Signal
- 0V to 5V
Exhaust Gas Temperature Sensors
- Part Number
- 11787558026
- Type
- NTC Thermistor
- Location
-
- Pre-catalytic converter
- Post-catalytic converter
- Temperature Range
- -40°C to 1000°C
- Accuracy
- ±5°C
- Response Time
- less than 10 seconds
Catalytic Converter Efficiency Sensors
- Part Number
- 11787558027
- Type
- Oxygen Storage Capacity Sensor
- Location
- Integrated into catalytic converter
- Measurement Range
- 0% to 100% efficiency
- Accuracy
- ±2%
- Response Time
- less than 200 ms
Differential Pressure Sensor
- Part Number
- 11747837946
- Type
- Piezoresistive Sensor
- Location
- Diesel Particulate Filter (DPF)
- Pressure Range
- 0 kPa to 10 kPa
- Accuracy
- ±0.1 kPa
- Operating Temperature
- -40°C to 150°C
Fuel Tank Leak Detection Sensor
- Part Number
- 16137183794
- Type
- Pressure Sensor
- Location
- Fuel tank
- Pressure Range
- -5 kPa to 5 kPa
- Accuracy
- ±0.05 kPa
- Response Time
- less than 1 second
Evaporative Emissions Sensor
- Part Number
- 16137183795
- Type
- Hydrocarbon Sensor
- Location
- Evaporative emissions system
- Measurement Range
- 0 ppm to 10000 ppm
- Accuracy
- ±10 ppm
- Response Time
- less than 2 seconds
Sensor Connectors
- Type
- Waterproof, high-temperature
- Pin Count
-
- 4-pin
- 6-pin
- Material
- Thermoplastic
- Operating Temperature
- -40°C to 150°C
- Voltage Rating
- 12V to 24V
Diagnostic Specifications
- Fault Codes
-
- P0130
- P0135
- P0420
- P0430
- P2201
- Diagnostic Tool
- BMW ISTA/D
- Readiness Monitors
-
- Oxygen Sensor
- Catalyst
- Evaporative System
- Test Conditions
-
- Engine at operating temperature
- Closed-loop operation
Service Information Service
Detailed service requirements and schedules for emissions sensors
- Inspect oxygen sensors for contamination
- Check NOx sensor functionality
- Verify catalytic converter efficiency
Replace sensors if out of tolerance or faulty
- Replace oxygen sensors
- Inspect and clean MAF sensor
- Test exhaust gas temperature sensors
Follow BMW-recommended procedures for sensor replacement
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What is the function of the oxygen sensor in the 2008-2015 BMW 740i?
What is the function of the oxygen sensor in the 2008-2015 BMW 740i?
The oxygen sensor, also known as the O2 sensor, monitors the oxygen levels in the exhaust gases. It provides real-time data to the Engine Control Unit (ECU) to optimize the air-fuel mixture for efficient combustion and reduced emissions. The sensor operates at a voltage range of 0.1V (lean mixture) to 0.9V (rich mixture).
Q2 How often should the emissions sensors be replaced in a BMW 740i?
How often should the emissions sensors be replaced in a BMW 740i?
BMW recommends inspecting the emissions sensors every 60,000 miles. Replacement intervals vary based on driving conditions, but typically, oxygen sensors should be replaced every 90,000 to 120,000 miles. Fault codes such as P0130 or P0150 may indicate sensor failure.
Q3 What are the symptoms of a failing NOx sensor in the BMW 740i?
What are the symptoms of a failing NOx sensor in the BMW 740i?
A failing NOx sensor may trigger the Check Engine Light, cause poor fuel economy, or result in increased emissions. Diagnostic trouble codes such as P2200 or P2201 may appear. The NOx sensor operates at a temperature range of 300°C to 800°C and measures nitrogen oxide levels in the exhaust.
Q4 Can I replace the emissions sensors myself, or should I consult a professional?
Can I replace the emissions sensors myself, or should I consult a professional?
While it is possible to replace emissions sensors yourself, it requires specialized tools and knowledge of BMW's diagnostic systems. Improper installation can lead to incorrect readings or damage to the ECU. BMW recommends professional service to ensure proper calibration and functionality.
Q5 What is the difference between upstream and downstream oxygen sensors?
What is the difference between upstream and downstream oxygen sensors?
Upstream oxygen sensors (pre-catalytic converter) monitor the air-fuel ratio for combustion optimization. Downstream sensors (post-catalytic converter) measure the efficiency of the catalytic converter. Both sensors are critical for emissions compliance and engine performance.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
BMW Emissions Sensor Replacement Guide
Coming SoonStep-by-step instructions for replacing oxygen and NOx sensors in the 2008-2015 BMW 740i, including torque specifications and diagnostic tips.
BMW Diagnostic Trouble Codes for Emissions Systems
Coming SoonA comprehensive list of fault codes related to emissions sensors, including causes and recommended solutions.
BMW Genuine Parts Catalog for Emissions Sensors
Coming SoonAccess the official BMW parts catalog to identify and purchase genuine emissions sensors for your 740i.
BMW Emissions System Maintenance Schedule
Coming SoonDetailed maintenance schedule for the emissions system, including inspection and replacement intervals.
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