HELLA 37QBSDD45 Exhaust Temperature Sensor

( Brand: Hella ), ( Manufacturer Part Number: 37QBSDD45 ), ( Type: Exhaust Temperature Sensor ), ( Fits 1: 2007-2009 Mercedes E320 ), ( Fits 2: 2011-2013 Mercedes E350 ), ( Fit Note: Hella Oe Certified 2-pin Connector Bolted Cable ), ( Manufacturer Warranty: 12 Month Warranty ), ( Attention: Please Read All Notes To Confirm Fitment ), ( Cs-sku: 400 )

Review HELLA Exhaust Temperature Sensor fits E320 E350 2007–2013

The **HELLA 37QBSDD45 Exhaust Temperature Sensor** is a high-performance, precision-engineered component designed to deliver reliable and accurate temperature monitoring for the exhaust system of select Mercedes-Benz models, including the **E320 and E350 sedans and station wagons** produced between **2007 and 2013**. This sensor is a critical part of your vehicle s emissions control and engine management systems, ensuring optimal performance, fuel efficiency, and compliance with modern environmental regulations. Crafted with HELLA s signature quality and durability, this sensor is built to withstand the extreme thermal and mechanical stresses of high-temperature exhaust environments, providing consistent readings that help the engine control unit (ECU) make real-time adjustments to maintain peak efficiency.

The **37QBSDD45** is a **thermocouple-type temperature sensor**, featuring a robust stainless-steel housing and a high-grade thermocouple probe that extends deep into the exhaust stream for precise temperature detection. Its design minimizes thermal lag, allowing the sensor to respond quickly to fluctuations in exhaust gas temperature, which is essential for accurate diagnostics and adaptive engine tuning. Whether your vehicle is cruising on the highway, accelerating under load, or idling in stop-and-go traffic, this sensor ensures that the ECU receives the most accurate data possible to optimize combustion, reduce emissions, and prevent potential damage from overheating.

Compatibility is a key strength of this sensor, as it is specifically engineered to fit a range of **Mercedes-Benz E-Class models** from **2007 through 2013**, including the **E320 (M253 engine) and E350 (M256 engine)** variants. The sensor s universal fitment ensures seamless integration with the factory exhaust manifold or turbocharger housing, where it connects via a standard **two-pin electrical connector**, maintaining compatibility with the vehicle s existing wiring harness. This eliminates the need for additional modifications or adapters, making installation straightforward for both professional mechanics and experienced DIY enthusiasts.

Beyond its technical specifications, the **HELLA 37QBSDD45** stands out for its **long-term reliability and resistance to corrosion**, a critical factor in exhaust systems exposed to moisture, soot, and high temperatures. The sensor s protective coating and robust construction help prevent premature failure, reducing the likelihood of costly engine misdiagnoses or performance issues. Additionally, HELLA s commitment to quality assurance means that each sensor undergoes rigorous testing to meet or exceed OEM standards, ensuring that it performs as effectively as the original equipment manufacturer s part.

For vehicle owners seeking to maintain their Mercedes-Benz s performance, emissions compliance, or troubleshoot engine warning lights related to exhaust temperature, the **HELLA 37QBSDD45** is an indispensable upgrade. Whether replacing a failed sensor, upgrading to a higher-quality aftermarket part, or ensuring long-term reliability, this sensor delivers the precision and durability needed to keep your engine running smoothly. With its precise temperature readings and robust construction, it is an ideal choice for those who demand nothing less than excellence in automotive performance and diagnostics.

### Pros and Cons of buying a Hella 37QB5DD45 Exhaust Temperature Sensor for 2007 2013 E320/E350 Models

1. **OEM Quality and Fitment** The Hella part is an original equipment manufacturer (OEM) replacement, meaning it is designed specifically for your vehicle s exhaust system. This ensures proper fitment, compatibility with wiring harnesses, and alignment with the engine control module (ECM) calibration. Aftermarket sensors may not integrate as seamlessly, potentially causing issues with the vehicle s diagnostics or performance.

2. **Reliability and Durability** Hella is a well-regarded brand in the automotive industry, known for producing sensors that are robust and built to last. The 37QB5DD45 is designed to withstand the harsh conditions of the exhaust system, including high temperatures and corrosive environments. This reduces the likelihood of premature failure compared to cheaper, no-name alternatives.

3. **Accurate Readings** An accurate exhaust temperature sensor is critical for proper engine management, especially in models like the E320/E350, which rely on precise sensor data to optimize fuel delivery, turbocharger performance (if equipped), and emissions control. A faulty sensor can lead to incorrect readings, causing issues like poor fuel economy, rough idling, or even check engine lights (CEL) due to misfires or catalytic converter inefficiencies.

4. **Compatibility with Modern Diagnostics** The sensor is programmed to work with the ECM in your vehicle, ensuring that diagnostic trouble codes (DTCs) related to exhaust temperature are accurately interpreted. This is particularly important if you plan to use an OBD-II scanner for troubleshooting or if your vehicle s emissions system requires regular checks.

5. **Warranty and Support** Hella parts often come with manufacturer warranties, providing some level of protection against defects. Additionally, Hella is a trusted brand with widespread availability, making it easier to find replacements or technical support if needed.

6. **Prevents Secondary Damage** A failing exhaust temperature sensor can lead to incorrect data being sent to the ECM, which may result in improper turbocharger cooling (if applicable), increased strain on the catalytic converter, or even damage to the exhaust manifold or oxygen sensors. Replacing it with an OEM-quality sensor mitigates these risks.

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1. **Cost** The Hella 37QB5DD45 is more expensive than many aftermarket alternatives. While the price reflects its quality, it may be a significant investment if you re on a tight budget. However, the long-term reliability often justifies the cost.

2. **Limited Availability** Depending on your location, finding the exact part number (37QB5DD45) may require ordering from an online retailer or an auto parts store with a good inventory of OEM components. Some local shops may not stock it, requiring you to wait for delivery.

3. **Installation Complexity** While the sensor itself is relatively straightforward to replace, accessing it may require removing parts of the exhaust system or the engine bay cover. If you re not comfortable with DIY repairs, you may need to pay for professional installation, adding to the overall cost.

4. **Potential for Counterfeit Parts** As with any OEM part, there is a risk of purchasing a counterfeit Hella sensor, especially from third-party sellers. Counterfeit parts may not function correctly, leading to recurring issues or voiding any warranty coverage. Always buy from reputable dealers or authorized sellers to avoid this risk.

5. **Overkill for Minor Issues** If your exhaust temperature sensor is failing due to a minor issue (e.g., a loose connection or minor corrosion), replacing it with a new OEM sensor may be more than necessary. In such cases, a thorough inspection and cleaning of the existing sensor (if accessible) or a cheaper aftermarket replacement might suffice. However, if the sensor is physically damaged or reading incorrectly, the Hella part is the safest choice.

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The Hella 37QB5DD45 exhaust temperature sensor is an excellent choice for your 2007 2013 E320/E350 if you prioritize reliability, accuracy, and long-term performance. Its OEM quality ensures proper integration with your vehicle s systems, reducing the risk of secondary issues caused by incorrect sensor readings. While the upfront cost is higher than aftermarket options, the sensor s durability and compatibility with modern diagnostics make it a worthwhile investment, especially for vehicles where exhaust temperature data is critical to engine management.

If you re experiencing symptoms like check engine lights (P0500, P0505, P0506, or P0507), rough idling, or poor fuel economy, replacing the sensor with the Hella part is a proactive step to maintain your vehicle s health. However, if your budget is limited and the sensor is only slightly degraded, you could explore aftermarket alternatives (e.g., Bosch or Delphi sensors) that offer similar performance at a lower cost. Always verify compatibility and read reviews before purchasing.

For the best balance of quality, reliability, and long-term performance, **purchase the Hella 37QB5DD45 exhaust temperature sensor** for your E320/E350. Ensure you buy it from a trusted source to avoid counterfeit parts, and consider having it installed by a professional if you re unsure about the process. This will help you avoid potential issues down the line and keep your vehicle running optimally.

Details:

Thread Sealer Included: Yes. Improved Engine Protection: Provides real-time data to prevent overheating and potential engine damage. Vehicle Sub model, Position: Rear, 2011 - 2013 Mercedes E350Bluetec. High-Quality Construction: Built to endure extreme temperatures, vibrations, and harsh conditions for long-lasting reliability.

Connector Gender: Female. Product Specifications. Connector Quantity: Connector Shape: Oval.

Accurate Temperature Monitoring: Measures exhaust gas temperatures to optimize engine performance and efficiency. Detailed Applications Vehicle Sub model, 2007 - 2009 Mercedes E320Bluetec. Exhaust Temperature Sensor 37QBSDD45 for E320 E350 2008 2007 2009 2011 2012 2013: Brand: Hella condition: New, Notes HELLA OE Certified 2-Pin Connector - Bolted Cable: 670mm Features: OEM Fit Easy Installation: designed to fit seamlessly with your vehicles exhaust system a hassle-free replacement.

part #: 37qbsdd45 prices

• $103.67-$118.54

specifications emissyste:

• for models: E320, E350
• for years: 2007-2013
• brand: Hella
• mpn: 37qbsdd45
• type: Exhaust Temperature Sensor
• fits 1: 2007-2009 Mercedes E320
• fits 2: 2011-2013 Mercedes E350
• fit note: Hella Oe Certified 2-pin Connector Bolted Cable
• manufacturer warranty: 12 Month Warranty
• attention: Please Read All Notes To Confirm Fitment
• cs-sku: 400

payments emissyste:

• credit card: Diners-club
• other
• wallet: Paypal

shipping emissyste:

• service: Standard
• type: Fixed
• class: Standard
• transit: 3-7 Days
• cost: $0.00

offer emissyste:

• sold: 0
• started: May 13, 2026
• options: Ship-to-home
• availability: In Stock
• quantity: 1

seller emissyste:

• city: Fresno, California
• rating: 97.3%
• # reviews: 57983

general emissyste:

• Car Truck Parts Accessories > Exhaust Emission Systems > Other Exhaust Emission Parts
• condition: New

returns emissyste:

• paid by: Seller
• time: 30 Days
• policy: Returns Accepted

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