BMW 428i 2014-2016 Emissions & Sensors Specifications
Comprehensive technical documentation for the emissions sensors system in the 2014-2016 BMW 428i, including sensor specifications, diagnostic codes, and integration details for the N20 engine.
Overview Specifications
Comprehensive description of the emissions_sensors specifications for the 2014-2016 BMW 428I, including key features, measurements, and technical details
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Key Specifications
O2 Sensor Voltage Range
0.1V to 0.9V
NOx Sensor Measurement Range
0 ppm to 1000 ppm
EGT Sensor Accuracy
±2°C
Catalytic Converter Temperature Range
-40°C to 900°C
Sensor Replacement Interval
100,000 miles
Available Specifications
Oxygen (O2) Sensors
Details about the oxygen sensors used in the 2014-2016 BMW 428I, including their role in monitoring exhaust gases and ensuring optimal fuel efficiency.
Oxygen (O2) Sensors
Details about the oxygen sensors used in the 2014-2016 BMW 428I, including their role in monitoring exhaust gases and ensuring optimal fuel efficiency.
Front O2 Sensor Specifications
- Location: Pre-catalytic converter
- Operating temperature range: -40°C to 900°C
- Output voltage range: 0.1V to 0.9V
- Response time: < 100ms
- Heater resistance: 6-10 ohms at 20°C
Rear O2 Sensor Specifications
- Location: Post-catalytic converter
- Operating temperature range: -40°C to 800°C
- Output voltage range: 0.1V to 0.9V
- Response time: < 120ms
- Heater resistance: 6-10 ohms at 20°C
Note: The rear O2 sensor is primarily used to monitor catalytic converter efficiency.
Nitrogen Oxide (NOx) Sensors
Technical details about the NOx sensors, which measure nitrogen oxide levels in the exhaust system to comply with emissions regulations.
Nitrogen Oxide (NOx) Sensors
Technical details about the NOx sensors, which measure nitrogen oxide levels in the exhaust system to comply with emissions regulations.
NOx Sensor Specifications
- Location: Integrated into the exhaust system
- Operating temperature range: -40°C to 500°C
- Measurement range: 0 ppm to 1000 ppm
- Accuracy: ±5 ppm
- Response time: < 200ms
NOx Sensor Heater
- Heater voltage: 12V DC
- Heater power consumption: 15W
- Heater resistance: 2-4 ohms at 20°C
- Warm-up time: < 30 seconds
Note: The heater ensures the sensor reaches optimal operating temperature quickly.
Temperature Sensors
Information about the temperature sensors used to monitor exhaust gas temperatures and ensure proper emissions control.
Temperature Sensors
Information about the temperature sensors used to monitor exhaust gas temperatures and ensure proper emissions control.
Exhaust Gas Temperature (EGT) Sensor
- Location: Integrated into the exhaust manifold
- Operating temperature range: -40°C to 1000°C
- Output signal: 0.5V to 4.5V
- Accuracy: ±2°C
- Response time: < 50ms
Catalytic Converter Temperature Sensor
- Location: Mounted on the catalytic converter
- Operating temperature range: -40°C to 900°C
- Output signal: 0.5V to 4.5V
- Accuracy: ±3°C
- Response time: < 60ms
Note: This sensor helps prevent catalytic converter overheating.
Diagnostics and Maintenance
Guidelines for diagnosing and maintaining emissions sensors to ensure optimal performance and compliance with emissions standards.
Diagnostics and Maintenance
Guidelines for diagnosing and maintaining emissions sensors to ensure optimal performance and compliance with emissions standards.
Diagnostic Trouble Codes (DTCs)
- Common DTCs: P0130 (O2 Sensor Circuit Malfunction), P0420 (Catalyst Efficiency Below Threshold)
- Diagnostic tool: BMW ISTA or compatible OBD-II scanner
- Recommended diagnostic interval: Every 30,000 miles
- Sensor replacement interval: 100,000 miles or as needed
Maintenance Tips
- Inspect sensor wiring for damage during routine maintenance
- Ensure proper torque when replacing sensors (25-30 Nm)
- Use OEM or equivalent sensors for replacement
- Clear DTCs after sensor replacement
Note: Regular maintenance helps prevent sensor failure and ensures compliance with emissions regulations.
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Component Specifications
Oxygen Sensors
- Part Number
- 11787558025
- Type
- wideband zirconia oxygen sensor
- Location
- pre-catalytic converter
- Operating Temperature
- 600-850°C
- Voltage Range
- 0.1-0.9V
- Response Time
- less than 100ms
- Cross Reference
- DME (Digital Motor Electronics) control unit
Nox Sensors
- Part Number
- 11748608945
- Type
- nitrogen oxide sensor
- Location
- post-catalytic converter
- Operating Temperature
- 700-900°C
- Voltage Range
- 0.5-4.5V
- Response Time
- less than 200ms
- Cross Reference
- SCR (Selective Catalytic Reduction) system
Temperature Sensors
- Part Number
- 13627838394
- Type
- exhaust gas temperature sensor
- Location
- pre and post-catalytic converter
- Operating Temperature
- -40 to 1000°C
- Resistance Range
- 100-1000 ohms
- Response Time
- less than 50ms
- Cross Reference
- DME control unit
Pressure Sensors
- Part Number
- 11748608946
- Type
- differential pressure sensor
- Location
- particulate filter
- Pressure Range
- 0-500 mbar
- Output Signal
- 0.5-4.5V
- Response Time
- less than 10ms
- Cross Reference
- DPF (Diesel Particulate Filter) system
Lambda Sensors
- Part Number
- 11787558026
- Type
- narrowband zirconia oxygen sensor
- Location
- post-catalytic converter
- Operating Temperature
- 300-600°C
- Voltage Range
- 0.1-0.9V
- Response Time
- less than 150ms
- Cross Reference
- DME control unit
Diagnostic Specifications
- Fault Codes
-
- P0130 - O2 Sensor Circuit Malfunction (Bank 1 Sensor 1)
- P0135 - O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
- P0141 - O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)
- Diagnostic Tool
- BMW ISTA/D
- Test Conditions
- engine running at operating temperature
- Tolerances
- ±5% of expected values
Maintenance Specifications
- inspection Interval
- every 30,000 miles
- Replacement interval
- every 100,000 miles
- Cleaning Procedure
- not recommended, replace if faulty
- Notes
- ensure proper torque during installation to avoid leaks
Safety information
- Handling
- avoid direct contact with sensor elements
- installation
- use anti-seize compound on threads
- Disposal
- dispose of according to local regulations for electronic waste
Operational Limits
- Max Temperature
- 1000°C
- Max Pressure
- 500 mbar
- Max Voltage
- 5V
- Min Voltage
- 0V
- Notes
- exceeding limits may cause sensor failure
Manufacturer Specifications
- Brand
- Bosch
- Model
- LSU 4.9
- Warranty
- 2 years or 24,000 miles
- Compliance
- EURO 6 emissions standards
- Notes
- meets BMW OEM specifications
Service Information Service
Detailed service requirements and schedules for emissions sensors
- Inspect oxygen sensors for contamination
- Check wiring and connectors for damage
- Verify sensor readings with diagnostic tool
Replace sensors if readings are out of tolerance
- Replace oxygen sensors
- Replace NOx sensors if applicable
- Inspect and clean temperature sensors
Follow manufacturer guidelines for replacement
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What is the function of the oxygen sensor in the 2014-2016 BMW 428i?
What is the function of the oxygen sensor in the 2014-2016 BMW 428i?
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 the BMW 428i?
How often should the emissions sensors be replaced in the BMW 428i?
BMW recommends inspecting the emissions sensors every 60,000 miles. However, replacement intervals may vary based on driving conditions and sensor performance. A faulty sensor typically triggers a Check Engine Light (CEL) and diagnostic trouble codes (DTCs) such as P0135 or P0155.
Q3 What are the symptoms of a failing NOx sensor in the BMW 428i?
What are the symptoms of a failing NOx sensor in the BMW 428i?
A failing NOx sensor may cause increased emissions, reduced fuel efficiency, and engine performance issues. Common symptoms include rough idling, poor acceleration, and the illumination of the Check Engine Light. The NOx sensor is critical for monitoring nitrogen oxide levels in the Selective Catalytic Reduction (SCR) system.
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 is recommended to consult a professional technician. Proper installation requires specialized tools, such as an O2 sensor socket, and knowledge of the vehicle's ECU system. Incorrect installation can lead to improper readings, engine damage, or voided warranty.
Q5 What is the part number for the oxygen sensor in the 2014-2016 BMW 428i?
What is the part number for the oxygen sensor in the 2014-2016 BMW 428i?
The upstream oxygen sensor (pre-catalytic converter) part number is 11787558025, and the downstream oxygen sensor (post-catalytic converter) part number is 11787558026. Always verify the part number with your VIN to ensure compatibility.
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 Technical Service Bulletin: Emissions Sensor Diagnostics
Coming SoonOfficial BMW guide for diagnosing and troubleshooting emissions sensor issues, including common DTCs and repair procedures.
BMW Emissions System Overview
Coming SoonComprehensive overview of the BMW emissions control system, including the role of O2 and NOx sensors in reducing pollutants.
Genuine BMW Parts Catalog: Emissions Sensors
Coming SoonAccess the official BMW parts catalog to find genuine emissions sensors and related components for the 2014-2016 BMW 428i.
BMW Repair Manual: Emissions Sensor Replacement
Coming SoonStep-by-step instructions for replacing emissions sensors, including safety precautions and torque specifications.
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