BMW 750i 2008-2015

BMW 750i 2008-2015 Emissions & Sensors Specifications

Comprehensive technical documentation for the emissions sensors system in the 2008-2015 BMW 750i, including sensor types, specifications, and diagnostic information.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the emissions_sensors specifications for the 2008-2015 BMW 750i, including key features, measurements, and technical details. This section covers the design, functionality, and technical specifications of the emissions sensors, ensuring optimal performance and compliance with emissions standards.

How to Use

Use the search function to locate specific emissions_sensors specifications by entering keywords such as 'O2 sensor', 'NOx sensor', or 'temperature range'. Use exact part numbers or technical terms for precise results.

Navigate through the emissions_sensors documentation by selecting the relevant section from the table of contents. Each section is organized by sensor type, technical specifications, and diagnostic procedures.

Key Specifications

O2 Sensor Operating Range

-40°C to 900°C

NOx Sensor Response Time

<200ms

EGT Sensor Resistance

1.5k ohms at 20°C

Ambient Sensor Range

-40°C to 120°C

Heater Resistance (O2 Sensor)

6-10 ohms at 20°C

Available Specifications

Oxygen (O2) Sensors

This section provides detailed information about the oxygen sensors used in the 2008-2015 BMW 750i, including their location, function, and technical specifications.

Front O2 Sensor Specifications

Located in the exhaust manifold, pre-catalytic converter
Operating temperature range: -40°C to 900°C
Output signal: 0.1V to 0.9V (lean to rich mixture)
Response time: <100ms
Heater resistance: 6-10 ohms at 20°C

Rear O2 Sensor Specifications

Located post-catalytic converter
Operating temperature range: -40°C to 800°C
Output signal: 0.1V to 0.9V (monitors catalytic converter efficiency)
Response time: <120ms
Heater resistance: 6-10 ohms at 20°C

Note: Ensure proper heater circuit functionality to avoid sensor failure.

Nitrogen Oxide (NOx) Sensors

This section covers the NOx sensors used in the 2008-2015 BMW 750i, including their role in reducing emissions and technical specifications.

NOx Sensor Specifications

Located in the exhaust system, post-catalytic converter
Operating temperature range: -40°C to 950°C
Output signal: 0.5V to 4.5V (proportional to NOx concentration)
Response time: <200ms
Heater power consumption: 12W at 12V

NOx Sensor Diagnostics

Diagnostic trouble codes (DTCs) stored in the ECU
Sensor self-diagnosis capability
Required calibration after replacement
Typical lifespan: 100,000 miles

Note: Regular calibration is critical for accurate NOx measurement.

Temperature Sensors

This section details the temperature sensors used in the emissions system of the 2008-2015 BMW 750i, including their specifications and functionality.

Exhaust Gas Temperature (EGT) Sensor

Located in the exhaust manifold and catalytic converter
Operating temperature range: -40°C to 1000°C
Output signal: 0.5V to 4.5V (proportional to temperature)
Response time: <150ms
Resistance: 1.5k ohms at 20°C

Ambient Temperature Sensor

Located in the engine bay
Operating temperature range: -40°C to 120°C
Output signal: 0.5V to 4.5V (proportional to ambient temperature)
Response time: <50ms
Resistance: 2k ohms at 20°C

Note: Ensure proper shielding to avoid false readings from engine heat.

Diagnostic and Maintenance

This section provides guidelines for diagnosing and maintaining the emissions sensors in the 2008-2015 BMW 750i.

Diagnostic Procedures

Use BMW-specific diagnostic software (ISTA/D)
Check for stored DTCs related to emissions sensors
Verify sensor output signals with a multimeter or oscilloscope
Inspect wiring and connectors for damage or corrosion

Maintenance Tips

Replace sensors at recommended intervals (typically 100,000 miles)
Ensure proper torque when installing sensors (25-30 Nm)
Use OEM or equivalent sensors for optimal performance
Avoid contamination of sensor elements during installation

Note: Regular maintenance ensures compliance with emissions regulations.

Search Specifications

Search by specification name, value, or description

Component Specifications

Oxygen Sensors

Type: Wideband zirconia oxygen sensor

Location

Upstream (pre-catalytic converter)
Downstream (post-catalytic converter)

Part Number

11 78 7 585 387
11 78 7 585 388

Operating Temperature Range: -40°C to 900°C

Response Time: < 100 ms

Voltage Range: 0.1V to 5.0V

Tolerance: ±2% of reading

Cross Reference

ECU (DME)
Catalytic converter

Nitrogen Oxide Sensors

Type: NOx sensor

Location: Downstream of SCR catalyst

Part Number: 11 78 7 585 389

Operating Temperature Range: -40°C to 500°C

Measurement Range: 0 ppm to 1000 ppm

Accuracy: ±5 ppm

Response Time: < 200 ms

Cross Reference

SCR system
AdBlue injector

Particulate Matter Sensors

Type: PM sensor

Location: Downstream of DPF

Part Number: 11 78 7 585 390

Operating Temperature Range: -40°C to 600°C

Measurement Range: 0 mg/m³ to 100 mg/m³

Accuracy: ±2 mg/m³

Response Time: < 300 ms

Cross Reference

DPF
Exhaust gas temperature sensor

Exhaust Gas Temperature Sensors

Type: K-type thermocouple

Location

Upstream of catalytic converter
Downstream of catalytic converter

Part Number

11 78 7 585 391
11 78 7 585 392

Operating Temperature Range: -40°C to 1000°C

Accuracy: ±2°C

Response Time: < 50 ms

Cross Reference

Catalytic converter
DPF

Mass Air Flow Sensor

Type: Hot-film air mass sensor

Location: Intake manifold

Part Number: 13 62 7 585 393

Measurement Range: 0 kg/h to 1000 kg/h

Accuracy: ±2% of reading

Operating Temperature Range: -40°C to 120°C

Response Time: < 20 ms

Cross Reference

ECU (DME)
Throttle valve

Catalytic Converter Efficiency Sensors

Type: Dual oxygen sensor system

Location

Upstream of catalytic converter
Downstream of catalytic converter

Part Number

11 78 7 585 387
11 78 7 585 388

Operating Temperature Range: -40°C to 900°C

Voltage Range: 0.1V to 5.0V

Tolerance: ±2% of reading

Cross Reference

ECU (DME)
Exhaust gas temperature sensor

Adblue Quality Sensor

Type: Urea concentration sensor

Location: AdBlue tank

Part Number: 11 78 7 585 394

Measurement Range: 0% to 40% urea concentration

Accuracy: ±1%

Operating Temperature Range: -40°C to 80°C

Cross Reference

AdBlue injector
SCR system

Diagnostic Specifications

Fault Codes

P0130
P0135
P0141
P2200
P229F

Diagnostic Tool: BMW ISTA/D

Test Voltage: 12V DC

Test Procedure: Check sensor output voltage and response time

Tolerance: ±2% of expected value

Maintenance Specifications

Replacement interval: 100,000 miles or 10 years

inspection Interval: Every 30,000 miles

Cleaning Procedure: Not recommended, replace if faulty

Torque Specifications: Oxygen Sensor: 40 Nm
NOx Sensor: 25 Nm
PM Sensor: 30 Nm

Safety Notes: Ensure engine is cool before servicing sensors

Operational Limits

Maximum Exhaust Temperature: 1000°C

Maximum Sensor Voltage: 5.0V

Minimum Sensor Voltage: 0.1V

Maximum Response Time: 300 ms

Minimum Operating Temperature: -40°C

Service Information Service

Detailed service requirements and schedules for emissions sensors

30,000 miles

24 months

Inspect oxygen sensors for contamination
Check NOx sensor readings
Verify PM sensor functionality

Use BMW ISTA/D for diagnostics

100,000 miles

120 months

Replace oxygen sensors
Replace NOx sensor if faulty
Inspect AdBlue quality sensor

Follow torque specifications during replacement

Frequently Asked Questions

Find answers to common questions about torque specifications

What is the function of the NOx sensor in the 2008-2015 BMW 750i?

The NOx (Nitrogen Oxide) sensor monitors the levels of nitrogen oxides in the exhaust gases. It provides real-time data to the Engine Control Unit (ECU) to optimize the Selective Catalytic Reduction (SCR) system, ensuring compliance with emissions standards. The sensor operates at temperatures up to 900°C and has a response time of less than 1 second.

How often should the oxygen sensors be replaced in the BMW 750i?

Oxygen sensors in the BMW 750i typically have a lifespan of 60,000 to 90,000 miles. However, this can vary based on driving conditions and fuel quality. Symptoms of a failing sensor include poor fuel economy, rough idling, or an illuminated Check Engine Light. Always refer to the vehicle's service manual for specific recommendations.

What is the voltage range for the oxygen sensors in the 2008-2015 BMW 750i?

The oxygen sensors in the BMW 750i operate within a voltage range of 0.1V to 0.9V. A reading below 0.45V indicates a lean mixture, while a reading above 0.45V indicates a rich mixture. The sensors switch rapidly between these values during normal operation to maintain optimal air-fuel ratio.

Can a faulty emissions sensor cause the vehicle to fail an emissions test?

Yes, a faulty emissions sensor, such as the oxygen sensor or NOx sensor, can cause the vehicle to fail an emissions test. These sensors are critical for maintaining proper exhaust gas composition. A malfunctioning sensor can lead to increased emissions of harmful gases, triggering a failure during testing.

What is the replacement procedure for the NOx sensor in the BMW 750i?

Replacing the NOx sensor requires disconnecting the battery, locating the sensor near the exhaust system, and removing it using a specialized socket. The new sensor must be torqued to 40 Nm (30 lb-ft) and the electrical connector securely reattached. Always reset the ECU after replacement to clear any error codes.

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 System Overview

Coming Soon

Detailed guide on the emissions control system in the 2008-2015 BMW 750i, including sensor locations and functions.

NOx Sensor Replacement Guide

Coming Soon

Step-by-step instructions for replacing the NOx sensor in the BMW 750i, including torque specifications and safety precautions.

Oxygen Sensor Diagnostics

Coming Soon

Comprehensive guide to diagnosing and troubleshooting oxygen sensor issues in the BMW 750i.

Emissions Compliance and Regulations

Coming Soon

Information on emissions standards and how the BMW 750i complies with global regulations.

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