Is it dangerous to keep driving with a faulty sensor?

Not immediately dangerous on modern electronic systems (they have built-in safety limits), but performance and drivability suffer — repair promptly.

Can this sensor be tested before replacing it?

Yes, a mechanic can check its readings against a specification using diagnostic equipment to confirm it’s faulty before replacement.

What is the sensor made of?

A precision electronic position-sensing element, often integrated into the throttle body.

What is this part and what does it do?

Full description available in the product description section above. Contact us with clarifying questions.

How do I tell if my part is faulty?

See the 'Signs of a faulty part' section above or run a diagnostic at an auto service.

Yes - all our used parts are tested before sale and sold with guaranteed quality.

When should the part be replaced?

When warning signals appear, diagnostic codes are present, or the system malfunctions.

Throttle sensor MERCEDES BENZ ML320 2006 SILVER

Name: Throttle sensor MERCEDES BENZ ML320 2006 SILVER
Brand: MERCEDES
SKU: A6421500494
Price: 45.00 EUR
Availability: InStock

OEM: A6421500494

Disassembled car photo

Engine running

Tested before shipping
Guaranteed quality
Fast delivery 3–7 days
14-day returns

What is this part and why does it matter?

The throttle position sensor measures the exact angle of the throttle valve, letting the ECU know how much air is entering the engine to calculate the correct fuel delivery.

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Not sure about compatibility? Send us a question with your car's make, model and year.

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Signs of a faulty part

If you notice any of the following, the part likely needs replacement:

Rough or unstable idle
Hesitation or delayed response when accelerating
Check Engine light with a throttle position fault code

Installation information

Integrated into the throttle body — a throttle relearn procedure is often required after installation.

Donor vehicle description

VIN: WDC1641221A081867
Make, model: MERCEDES BENZ W164 ML320
Year: 2006
Engine: Diesel 3.0 CDI OM 642.940 165KW
Transmission: Automatic 7-speed
Drive: Full 4WD
Colour: 775U

291 parts from this car

Frequently asked questions

The ECU needs to record the exact minimum and maximum positions of the new sensor to accurately translate throttle valve angle into fuel calculations.

What our customers say

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Price: affordable. Service: electrical equipment repair.
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Andris B.
September 2026
Price: excellent.
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Didier V.
August 2026
Super good! They came through with the part I needed, quickly and at a fair price! Thanks, and I definitely recommend!
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August 2026
I ordered a Heater Blower Motor Resistor for a Toyota Avensis. Delivery took eight days from Latvia to Ireland. I installed it, and everything works perfectly. I wish this company success.
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Aleksandr L.
Toyota Avensis
August 2026
No complaints about Evro Trans itself, everything's fine. But the delivery..... It felt like the order was being carried by turtles. 4 days from Riga to Daugavpils. Judging by the tracking, the parcel just sat somewhere behind a shed for 3 days, then they found it and delivered it the next day. I think that's why I won't be ordering there again.
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Paul F.
June 2026
Super fast delivery of the part, and good quality of the used part. Thanks for the service.
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May 2026
I ordered antifreeze heaters and an auxiliary pump. Everything arrived quickly, the very next day, and matched the description. I'm satisfied.
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February 2026
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November 2025
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Front fender
October 2025