BMW 335d Sedan (E90) Diesel Emissions Fluid Temperature Sensor Costs
The average cost for a BMW 335d Sedan (E90) Diesel Emissions Fluid Temperature Sensor Replacement is between $69 - $128. Get an instant quote with our AI repair estimator.
What is a Diesel Emissions Fluid (DEF) Temperature Sensor?
A Diesel Emissions Fluid (DEF) Temperature Sensor is a crucial component in modern diesel engines equipped with Selective Catalytic Reduction (SCR) systems. It monitors the temperature of the DEF, which is a urea-based solution used to reduce harmful nitrogen oxide (NOx) emissions from diesel exhaust systems. The sensor ensures the DEF remains within an optimal temperature range for effective NOx reduction. By maintaining the correct temperature, the DEF can properly mix and react within the SCR catalyst to convert NOx gases into harmless nitrogen and water vapor, thereby helping vehicles meet stringent emission standards.
Symptoms of a Faulty DEF Temperature Sensor
A malfunctioning DEF Temperature Sensor can lead to several noticeable symptoms. First, the 'Check Engine' or 'Service Emission System' warning light may illuminate on the dashboard, indicating a potential issue within the emission system. Another symptom is reduced engine performance or power loss, as the engine management system may switch to a reduced power mode to protect the emission system. You may also experience increased exhaust emissions or even failure to pass emissions inspections due to improper DEF dosing. Additionally, abnormal DEF consumption or a failure in the regeneration process of the diesel particulate filter could be linked to sensor issues. In some cases, the onboard diagnostic system may store a fault code related to the DEF temperature, which can be identified using a diagnostic scanner.
How urgent is DEF Temperature Sensor repair?
Repairing a DEF Temperature Sensor is moderately urgent. While a faulty sensor might not immediately impact vehicle drivability, it can lead to inefficient DEF usage and increased emissions. Over time, this may cause the vehicle to enter a 'limp mode' with reduced engine power to minimize emissions breaches, especially in jurisdictions with stringent emissions regulations. Therefore, addressing the problem promptly is crucial to maintain optimal vehicle performance and compliance with emission standards.
How much does DEF Temperature Sensor replacement cost?
The cost of replacing a DEF Temperature Sensor can vary depending on the make and model of the vehicle. Typically, expenses can range from $150 to $400, including both parts and labor. Labor costs might comprise a significant portion of the total, as reaching the sensor can sometimes involve removing other engine components. It's advisable to seek quotes from multiple repair shops and ensure that only quality replacement parts are used to maintain the vehicle's emission system integrity.
5 FAQs about Diesel Emissions Fluid Temperature Sensors
- What causes a DEF temperature sensor to fail?
The sensor can fail due to exposure to extreme temperature fluctuations, contamination by DEF crystals, or electronic component wear over time. Regular maintenance and inspection can help prevent issues. - Can I continue driving with a faulty DEF temperature sensor?
While you might be able to drive temporarily with a malfunctioning sensor, it's not recommended. Prolonged use can result in severe engine power reduction and increased emissions, potentially leading to fines in regions with strict emissions laws. - How can I confirm a DEF temperature sensor issue?
A diagnostic scan tool can read trouble codes related to the emission system, pinpointing a potential issue with the DEF temperature sensor. A physical inspection can also reveal signs of damage or contamination. - Is DEF temperature sensor replacement a DIY task?
For individuals with automotive repair experience, replacing the sensor might be feasible. However, considering potential complications and the need for diagnostic tools, professional assistance is recommended to ensure proper installation and system reset. - Can a faulty DEF temperature sensor affect fuel economy?
Indirectly, yes. A malfunctioning sensor can cause improper DEF dosing which may impact the exhaust's emission control process. In such scenarios, the engine might not run at peak efficiency, thereby affecting fuel consumption.
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2011 BMW 335d Sedan (E90) L6-3.0L DSL Turbo (M57Y) - Diesel Emissions Fluid Temperature Sensor Costs
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Parts: $51.00Labor: $43.00{ "partPrice": 51, "laborPrice": 43, "alldata_id": 48135, "alldata_vehicle_id": 48135, "title": "Diesel Emissions Fluid Temperature Sensor", "parts": { "qualifiers": [ { "name": "Upper", "qualifiers": [ { "name": "Top", "part": [ { "name": "Oxygen Sensor", "price": "391.61", "pricecode": "", "partnumber": "13627801158" } ] }, { "name": "Bottom", "part": [ { "name": "Oxygen Sensor", "price": "109.21", "pricecode": "", "partnumber": "13627805606" } ] } ] }, { "name": "Lower", "part": [ { "name": "Oxygen Sensor", "price": "109.21", "pricecode": "", "partnumber": "13627805607" } ] } ] }, "labors": { "operations": [ { "operation": "Replace", "qualifiers": [ { "name": "Temp Sensor", "note": "Fluid Temperature Sensor Is Serviced With The Fluid Reservoir.", "qualifiers": [] } ] } ] }, "year": 2010, "make": "BMW", "model": "335d Sedan (E90)", "engine": "L6-3.0L DSL Turbo (M57Y)" }2009 BMW 335d Sedan (E90) L6-3.0L DSL Turbo (M57Y) - Diesel Emissions Fluid Temperature Sensor Costs
Parts: $94.00Labor: $41.00{ "partPrice": 94, "laborPrice": 41, "alldata_id": 46869, "alldata_vehicle_id": 46869, "title": "Diesel Emissions Fluid Temperature Sensor", "parts": { "qualifiers": [ { "name": "Upper", "qualifiers": [ { "name": "Top", "part": [ { "name": "Oxygen Sensor", "price": "391.61", "pricecode": "", "partnumber": "13627801158" } ] }, { "name": "Bottom", "part": [ { "name": "Oxygen Sensor", "price": "109.21", "pricecode": "", "partnumber": "13627805606" } ] } ] }, { "name": "Lower", "part": [ { "name": "Oxygen Sensor", "price": "109.21", "pricecode": "", "partnumber": "13627805607" } ] } ] }, "labors": { "operations": [ { "operation": "Replace", "qualifiers": [ { "name": "Temp Sensor", "note": "Fluid Temperature Sensor Is Serviced With The Fluid Reservoir.", "qualifiers": [] } ] } ] }, "year": 2009, "make": "BMW", "model": "335d Sedan (E90)", "engine": "L6-3.0L DSL Turbo (M57Y)" }