70mm Mass Air Flow Sensor 038906461C 06A906461 06A906461X 0280217121 0280217122 0280217202

038906461C Mass Air Flow Sensor 06A906461/06A906461X/0280217121/0280217122/0280217202/0281002757/0986280202

The sensor is designed to be self-cleaning, with the sensing element periodically heated to burn off contaminants that may accumulate during normal operation. However, over time, the sensor element may become inaccurate or fail entirely due to aging, contamination, or thermal stress.

Part number 038906461C is widely cross-referenced across multiple automotive brands and aftermarket manufacturers. The following cross-references have been identified:

Additional cross-reference numbers that have been associated with this part include:

• 0281002757

• 06A906461X

• 0280217121

• 0.280.217.121

• 63137

• 138951

• 7411660

• MAF1073

• 1051396

• 10.1325

• 30231

• 95VW-12B529-BC

• AF1025812B1

The 038906461C Mass Air Flow Sensor is specifically designed for 1.9 TDI diesel engines, with particular emphasis on the ALH engine code. This sensor is not compatible with gasoline/petrol engines.

The following vehicles are confirmed to be compatible with part number 038906461C:

Important Note: This sensor is specifically designed for TDI diesel models only. Installation on non-TDI or gasoline engines may result in improper operation, incorrect air-fuel ratios, and potential engine damage. Always verify compatibility with your specific vehicle's engine code before purchase.

A failing or failed 038906461C Mass Air Flow Sensor can produce a range of noticeable driveability issues. The MAF sensor is responsible for measuring intake air mass so the ECM can determine proper fuel delivery. When this sensor provides inaccurate readings or fails completely, engine performance is directly affected.

1. OBD-II Scan: Retrieve diagnostic trouble codes. Common codes associated with MAF failure include P0100, P0101, P0102, P0103, and P0104 (MAF circuit/performance codes).

2. Disconnect Test: A simple diagnostic method is to unplug the MAF sensor connector before starting the engine. If the engine idle or performance improves significantly with the sensor disconnected, the MAF sensor is likely faulty.

3. Fuel Trim Monitoring: A failing MAF may cause short-term fuel trim to read rich at idle or lean under load.

4. Voltage Check: The sensor should show voltage changes from idle to approximately 3,000 RPM.

Note: Symptoms may appear intermittently. A MAF sensor can fail gradually, with performance deteriorating over time as the hot-film sensing element ages or becomes contaminated.

When purchasing a replacement 038906461C Mass Air Flow Sensor, consider the following factors to ensure proper fitment, performance, and longevity.

The 038906461C sensor is specifically for 1.9 TDI engines with ALH engine code. Always confirm your vehicle's engine code before purchasing. The engine code can typically be found on a sticker in the spare tire well, in the vehicle service manual, or stamped on the engine block.

While aftermarket alternatives may be available at lower price points, quality varies significantly. Some aftermarket sensors use inferior technology compared to OE-spec components. Quality sensors employ platinum sensor technology and are individually tested and calibrated. Sensors that meet or exceed OE specifications provide correct function and calibration to ensure trouble-free operation and emission compliance.

Ensure the replacement is a hot-film type MAF sensor as specified for this application. Incorrect sensor types will not provide proper readings to the ECM.

Some replacement options offer the sensor as a complete housing assembly, while others are insert-only units. Verify which type is appropriate for your vehicle and whether your existing housing can accommodate an insert.

This sensor features:

• 5-pin connector

• Male connector

• Rectangular / D-Shape connector

• Blade-type terminals

Confirm these specifications match your vehicle's wiring harness connector before purchasing.

The sensor has:

• 70 mm inlet and outlet connection diameter

• Flange mounting type with 2 mounting holes

• No mounting bracket or hardware included

Quality MAF sensors typically come with warranties ranging from 2 years to 3 years/36 months. Consider the warranty coverage when comparing options, as this can be an indicator of manufacturer confidence in product quality.

Some suppliers may require a core charge (refundable deposit) for the old sensor, which is refunded upon return of the used unit. Not all suppliers require this, so factor this into your purchase decision.

• Location: The MAF sensor is located in the intake duct between the air filter and throttle body

• Quantity: One sensor per vehicle

• DIY Feasibility: Replacement is generally straightforward for mechanically inclined individuals

• Caution: Handle the sensing element with care; contamination from dirt, moisture, or oil can cause premature failure

Before replacing the MAF sensor, confirm that it is the root cause of your vehicle's symptoms. Perform the disconnect test or consult a professional diagnostic scan. Other issues such as vacuum leaks, clogged air filters, or faulty oxygen sensors can produce similar symptoms.

Purchase from reputable suppliers with positive customer feedback. Reviews often provide valuable insight into product quality and compatibility. For example, many users have reported that replacing a faulty MAF with a quality unit resolved limp mode issues and restored engine performance.