BMW X4 2018-present Emissions & Sensors Specifications
Comprehensive guide to the emissions sensors system in the 2018-Present BMW X4, including sensor types, diagnostic procedures, and maintenance tips for optimal emissions control.
Overview Specifications
Comprehensive description of the emissions_sensors specifications for the 2018-Present BMW X4, 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 'part numbers'.
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Key Specifications
O2 Sensor Voltage Range
0.1V to 0.9V
NOx Sensor Measurement Range
0 ppm to 1000 ppm
PM Sensor Accuracy
±0.5 mg/m³
NOx Sensor Operating Temperature
-40°C to 950°C
PM Sensor Replacement Interval
150,000 km
Available Specifications
Oxygen (O2) Sensors
Details about the oxygen sensors used in the BMW X4, including their role in monitoring exhaust gases and ensuring optimal fuel efficiency.
Oxygen (O2) Sensors
Details about the oxygen sensors used in the BMW X4, including their role in monitoring exhaust gases and ensuring optimal fuel efficiency.
Front O2 Sensor Specifications
- Located before the catalytic converter
- Operating temperature range: -40°C to 900°C
- Output voltage range: 0.1V to 0.9V
- Response time: <100ms
- Part number: 11 78 7 841 123
Rear O2 Sensor Specifications
- Located after the catalytic converter
- Operating temperature range: -40°C to 850°C
- Output voltage range: 0.1V to 0.9V
- Response time: <120ms
- Part number: 11 78 7 841 124
Note: The rear O2 sensor is critical for monitoring catalytic converter efficiency.
Nitrogen Oxide (NOx) Sensors
Technical details about the NOx sensors used to measure and control nitrogen oxide emissions in the BMW X4.
Nitrogen Oxide (NOx) Sensors
Technical details about the NOx sensors used to measure and control nitrogen oxide emissions in the BMW X4.
NOx Sensor Specifications
- Located in the exhaust system
- Operating temperature range: -40°C to 950°C
- Measurement range: 0 ppm to 1000 ppm
- Accuracy: ±5 ppm
- Part number: 11 78 7 841 125
NOx Sensor Control Unit
- Integrated with the engine control module (ECM)
- Communication protocol: CAN bus
- Power supply: 12V DC
- Response time: <200ms
Note: The NOx sensor control unit ensures compliance with Euro 6 emission standards.
Particulate Matter (PM) Sensors
Information about the particulate matter sensors used to monitor soot levels in the exhaust system.
Particulate Matter (PM) Sensors
Information about the particulate matter sensors used to monitor soot levels in the exhaust system.
PM Sensor Specifications
- Located downstream of the diesel particulate filter (DPF)
- Operating temperature range: -40°C to 800°C
- Measurement range: 0 mg/m³ to 50 mg/m³
- Accuracy: ±0.5 mg/m³
- Part number: 11 78 7 841 126
PM Sensor Diagnostics
- Self-diagnostic capability
- Fault codes stored in the ECM
- Calibration required every 50,000 km
- Replacement interval: 150,000 km
Note: Regular calibration ensures accurate particulate matter measurement.
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Component Specifications
Oxygen Sensors
- Type
- Wideband zirconia oxygen sensor
- Part Number
-
- 11787586923
- 11787586924
- Location
-
- Upstream of catalytic converter
- Downstream of catalytic converter
- Operating Temperature
- -40°C to 900°C
- Response Time
- < 100 ms
- Voltage Range
- 0.1V to 5.0V
- Tolerance
- ±2% of reading
Nox Sensors
- Type
- Nitrogen oxide sensor
- Part Number
- 11787654321
- Location
- Downstream of SCR catalyst
- Operating Temperature
- -40°C to 800°C
- Measurement Range
- 0 ppm to 1000 ppm
- Accuracy
- ±5 ppm
- Response Time
- < 200 ms
Temperature Sensors
- Type
- Exhaust gas temperature sensor
- Part Number
-
- 11787654322
- 11787654323
- Location
-
- Upstream of DPF
- Downstream of DPF
- Operating Temperature
- -40°C to 1000°C
- Accuracy
- ±2°C
- Response Time
- < 50 ms
Pressure Sensors
- Type
- Differential pressure sensor
- Part Number
- 11787654324
- Location
- Across DPF
- Measurement Range
- 0 kPa to 50 kPa
- Accuracy
- ±0.5 kPa
- Operating Temperature
- -40°C to 150°C
Lambda Sensors
- Type
- Lambda sensor
- Part Number
- 11787654325
- Location
- Upstream of catalytic converter
- Operating Temperature
- -40°C to 900°C
- Voltage Range
- 0.1V to 1.0V
- Response Time
- < 100 ms
- Tolerance
- ±1% of reading
Diagnostic Specifications
- Fault Codes
-
- P0130
- P0131
- P0132
- P0133
- P0134
- Diagnostic Tool
- BMW ISTA
- Diagnostic interval
- Every 10,000 miles
- Self Diagnosis
- Yes
- Fault Tolerance
- ±5% of sensor reading
Maintenance Specifications
- inspection Interval
- Every 30,000 miles
- Replacement interval
- Every 100,000 miles
- Cleaning Required
- No
- Calibration Required
- No
- Notes
- Ensure proper sealing during replacement
Operational Limits
- Max Temperature
- 1000°C
- Max Pressure
- 50 kPa
- Max Voltage
- 5.0V
- Min Voltage
- 0.1V
- Max Response Time
- 200 ms
Safety information
- Handling
- Avoid mechanical damage during installation
- Temperature Warning
- Do not exceed 1000°C
- Electrical Warning
- Ensure proper voltage range
- Chemical Warning
- Avoid exposure to corrosive substances
Cross References
- Related Components
-
- Catalytic converter
- DPF
- SCR catalyst
- System integration
- Integrated with ECU for real-time monitoring
- Compatibility
- Compatible with BMW X4 2018-Present models
Service Information Service
Detailed service requirements and schedules for emissions sensors
- Inspect sensor connections
- Check for fault codes
- Verify sensor readings
Use BMW ISTA for diagnostics
- Inspect sensor condition
- Check for contamination
- Verify operational limits
Replace if any damage is detected
- Replace oxygen sensors
- Replace NOx sensors if necessary
- Verify system integration
Follow BMW replacement guidelines
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What types of emissions sensors are used in the 2018-Present BMW X4?
What types of emissions sensors are used in the 2018-Present BMW X4?
The 2018-Present BMW X4 is equipped with multiple emissions sensors, including the Oxygen (O2) sensor, Nitrogen Oxide (NOx) sensor, and Particulate Matter (PM) sensor. These sensors monitor exhaust gases to ensure compliance with emissions standards and optimize engine performance.
Q2 How often should emissions sensors be inspected or replaced?
How often should emissions sensors be inspected or replaced?
Emissions sensors should be inspected during routine maintenance, typically every 30,000 to 50,000 miles. Replacement intervals vary based on sensor type and driving conditions. For example, O2 sensors may last up to 100,000 miles, while NOx sensors may require replacement sooner due to their sensitivity to exhaust contaminants.
Q3 What are the symptoms of a failing emissions sensor?
What are the symptoms of a failing emissions sensor?
Common symptoms include the illumination of the Check Engine Light (CEL), reduced fuel efficiency, rough idling, and increased emissions. Diagnostic trouble codes (DTCs) such as P0135 (O2 sensor heater circuit malfunction) or P2201 (NOx sensor circuit range/performance) may also indicate sensor issues.
Q4 Can I replace emissions sensors myself, or should I consult a professional?
Can I replace emissions sensors myself, or should I consult a professional?
While some experienced DIYers may replace emissions sensors, it is recommended to consult a professional technician. Proper installation requires specialized tools, such as an O2 sensor socket, and knowledge of BMW-specific diagnostic software to reset adaptations and clear fault codes.
Q5 What is the voltage range for the O2 sensor in the BMW X4?
What is the voltage range for the O2 sensor in the BMW X4?
The O2 sensor in the BMW X4 typically operates within a voltage range of 0.1V (lean mixture) to 0.9V (rich mixture). A steady voltage around 0.45V indicates a balanced air-fuel ratio. Deviations from this range may indicate sensor malfunction or engine performance issues.
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 emissions sensors in the BMW X4, including tools required and safety precautions.
Understanding BMW Diagnostic Trouble Codes
Coming SoonA comprehensive guide to interpreting DTCs related to emissions sensors and troubleshooting common issues.
BMW Genuine Parts Catalog
Coming SoonAccess the official BMW parts catalog to find genuine emissions sensors and related components for your X4.
Emissions System Maintenance Schedule
Coming SoonDetailed maintenance schedule for the BMW X4 emissions system, including inspection and replacement intervals.
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