BOSCH 0-261-210-300 Sensor 4047025169363 9A1-606-112-02

( Brand: Bosch ), ( Manufacturer Part Number: 0-261-210-300 ), ( Part Type: Sensor ), ( Country Of Origin: Romania ), ( UPC: 047025169363 )

Review BOSCH Reference Sensor fits MARK

The **Bosch 0-261-210-300 9A1-606-112-02 Sensor** is a high-performance, precision-engineered component designed for advanced automotive diagnostics and engine management systems, specifically tailored for modern vehicles equipped with Bosch s cutting-edge electronic control units (ECUs). This sensor belongs to the **9A1 series**, a robust and reliable line of automotive sensors known for their durability, accuracy, and seamless integration with Bosch s fuel injection, ignition, and emissions control systems. Functioning as a **mass airflow sensor (MAF)**, this device plays a critical role in monitoring the volume of air entering the engine, enabling the ECU to calculate the precise air-fuel mixture required for optimal combustion. By providing real-time data on airflow dynamics, the sensor ensures efficient engine performance, improved fuel economy, and reduced emissions, adhering to stringent environmental regulations.

Constructed with Bosch s signature engineering excellence, the **0-261-210-300 9A1-606-112-02** features a **hot-film anemometer principle**, where a thin, heated wire or film detects airflow disturbances, converting them into electrical signals that the ECU interprets. This technology guarantees high sensitivity and rapid response times, even under varying engine loads and environmental conditions, such as temperature fluctuations or altitude changes. The sensor s robust housing is designed to withstand harsh automotive environments, including exposure to moisture, vibration, and temperature extremes, ensuring long-term reliability and minimal maintenance requirements. Its precise calibration and tight tolerances make it an ideal fit for a wide range of **Bosch-installed vehicles**, including passenger cars, SUVs, and light-duty trucks, particularly those manufactured between the late 1990s and early 2010s.

Beyond its technical specifications, the **Bosch 0-261-210-300 9A1-606-112-02** stands out for its compatibility with Bosch s **M 9.7, M 9.8, and M 9.9** engine management systems, making it a versatile upgrade or replacement option for mechanics and DIY enthusiasts working on vehicles equipped with these platforms. The sensor s plug-and-play design simplifies installation, allowing for straightforward replacement without the need for complex recalibration or diagnostic reprogramming, provided the vehicle s ECU is compatible. Whether used in original equipment manufacturing (OEM) applications or as a high-quality aftermarket replacement, this sensor delivers the precision and consistency expected from Bosch a brand synonymous with innovation and automotive excellence. For professionals and hobbyists alike, investing in this sensor ensures a reliable, long-lasting solution for maintaining peak engine performance and compliance with modern emissions standards.

### **Bosch 0-261-210-300 (9A1-606-112-02) Oxygen Sensor Pros and Cons**

#### **Overview**

The **Bosch 0-261-210-300 (9A1-606-112-02)** is a universal oxygen (O2) sensor designed for use in automotive exhaust systems. It is commonly used in applications requiring a **wide-band (WBO2) sensor** for precise air-fuel ratio (AFR) monitoring, often found in **turbocharged, direct-injection, or high-performance engines**. This sensor is compatible with various vehicle models, including some **BMW, Mercedes-Benz, Audi, and other European and Asian brands**, depending on the specific application.

---

### **Pros**

1. **High Precision and Wide-Band Capability**

- Unlike traditional narrow-band O2 sensors, this sensor provides **continuous AFR readings** across a wide range (e.g., 6:1 to 20:1), allowing for **optimal fuel trimming and tuning** in performance applications.

- Useful for **turbocharged, supercharged, or direct-injection engines** where traditional sensors may struggle to maintain accuracy under varying conditions.

2. **Universal Compatibility**

- Designed as a **universal replacement**, it can be installed in vehicles where the original sensor failed or was not available.

- Often used in **aftermarket tuning and performance modifications** where stock sensors may not provide sufficient data.

3. **Durability and Build Quality**

- Bosch is a well-known manufacturer of automotive sensors, and this model is built to **withstand high temperatures and exhaust gases**.

- The **ceramic element and protective housing** are designed for longevity, though performance depends on proper installation and vehicle conditions.

4. **Compatibility with Tuning Software**

- Works well with **ECU tuning tools** (e.g., Haltech, Link, AEM) that require **wide-band sensor input** for advanced fuel management.

- Useful for **dyno tuning and closed-loop adjustments** in modified engines.

5. **Cost-Effective for Universal Use**

- While not OEM-specific, it avoids the higher cost of **brand-specific sensors** in some cases, especially for older or discontinued models.

- Often cheaper than **OEM replacements** for certain applications.

6. **Reduces Emissions and Improves Efficiency**

- By providing **real-time AFR feedback**, it helps maintain **optimal combustion**, reducing **unburned fuel and emissions** while improving fuel economy in properly tuned systems.

---

### **Cons**

1. **Not OEM-Specific in Some Cases**

- While marketed as universal, **some vehicles require OEM-specific sensors** for proper calibration. Using a non-OEM sensor may lead to **ECU errors or poor performance** if the vehicle relies on sensor-specific signals.

- **Check compatibility** with your specific vehicle s ECU and wiring harness before installation.

2. **Requires Proper Installation and Wiring**

- Unlike plug-and-play sensors, this **wide-band sensor often needs additional wiring or an adapter** to interface with the vehicle s ECU or tuning device.

- **Improper installation** (e.g., incorrect grounding, loose connections) can lead to **erratic readings or sensor failure**.

3. **Limited to Specific Applications**

- Not suitable for **stock, naturally aspirated engines** running standard fuel systems, where a **narrow-band sensor** would suffice.

- Overkill for **basic maintenance** only beneficial for **performance tuning, turbocharged, or high-stress engines**.

4. **Potential for ECU Errors**

- Some vehicles **expect specific sensor signals**, and a universal sensor may trigger **check engine lights (CEL)** or **ECU error codes** if not properly configured.

- May require **ECU reprogramming or a tuner** to recognize the sensor correctly.

5. **Higher Upfront Cost Than Narrow-Band Sensors**

- More expensive than **basic O2 sensors** (e.g., Bosch 0-258-110-300), making it a **specialty purchase** rather than a standard replacement.

6. **Dependence on Tuning Knowledge**

- Without **proper tuning software and expertise**, the sensor s benefits may not be fully realized. Misinterpretation of readings can lead to **poor fueling strategies or engine damage**.

7. **Potential for Contamination**

- Like all O2 sensors, it can be **poisoned by lead, phosphorus, or silicon** in fuel or oil additives, reducing lifespan.

- **Exhaust system leaks** (e.g., cracked manifold, loose pipes) can also affect accuracy.

---

### **Conclusion**

The **Bosch 0-261-210-300 (9A1-606-112-02) wide-band O2 sensor** is a **high-quality, precision tool** best suited for **performance tuning, turbocharged, or direct-injection applications** where traditional sensors fall short. It excels in **providing real-time AFR data, improving fuel efficiency, and reducing emissions** in properly configured systems.

However, it is **not a universal fix** it requires **correct application, proper installation, and tuning expertise** to avoid issues. For **stock or naturally aspirated vehicles**, a **narrow-band sensor** would be more appropriate. Additionally, **ECU compatibility must be verified** to prevent errors.

If you are **modifying a high-performance engine, running a tuner, or replacing a failed wide-band sensor**, this is a **solid choice**. For **basic maintenance or stock applications**, consider a **simpler, OEM-specific sensor** instead.

---

### **Recommendation**

- You are **tuning a turbocharged, supercharged, or direct-injection engine**.

- You need **precise AFR feedback** for performance or emissions compliance.

- You have **tuning software** (e.g., Haltech, Link) to interface with it.

- The **vehicle s ECU supports wide-band sensors** (verify compatibility first).

- You are working on a **stock, naturally aspirated engine** without modifications.

- You lack **tuning knowledge or proper wiring adapters**.

- The **vehicle s ECU may reject non-OEM sensors** (risk of errors).

- You need a **budget-friendly, plug-and-play replacement** (a narrow-band sensor may suffice).

**Final Verdict:** A **specialized but valuable tool** for advanced tuning only purchase if you understand its requirements and application. Always **check compatibility** with your vehicle and tuning setup before buying.

Details:

OEM part suppliers sometimes remove vehicle manufacturer logos. Country of origin details may vary and are not always guaranteed to be 100% accurate due manufacturers utilizing multiple manufacturing locations. This can change or there be multiple manufacturing locations. BOSCH Engine Crankshaft Position Sensor 9A160611202.

All products are new and unused. Packaging may vary according to the product ordered. Compatibility info is only for North American model's. Warranty: Euro Depot provides a 24 month or 24,000 mile whichever occurs first warranty against manufacturing and material defects failure under normal use.

This can be seen as grind Marks, removal of stickers, or blank areas in the casting where vehicle manufacturer logo part number may have been. Not all optional equipment or production dates may be compatible, check the application notes on right of table.

part #: 0261210300 prices

• $62.37-$69.95

specifications cranshafengin:

• for models: Mark
• brand: Bosch
• mpn: 0-261-210-300
• part type: Sensor
• country of origin: Romania
• upc: 047025169363

returns cranshafengin:

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

offer cranshafengin:

• sold: 0
• quantity: 5
• availability: In Stock
• options: Ship-to-home
• started: May 29, 2026

shipping cranshafengin:

• class: Standard
• cost: $0.00
• service: FedEx Ground / FedEx Home Delivery
• transit: 3-5 Days
• type: Fixed
• carrier: FedEx

seller cranshafengin:

• rating: 99.9%
• city: Kennesaw, GA
• # reviews: 17311

payments cranshafengin:

• other
• wallet: Google-pay
• credit card: Visa

general cranshafengin:

• Car Truck Parts Accessories > Engines Engine Parts > Crankshafts
• condition: New

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