Mercedes-Benz W211 Air Quality Sensor - Used Original Parts
RM 200
Condition: Used (Original)Description
Product Title
Mercedes-Benz W211 Air Quality Sensor - Used Original Parts
Diagnosis and Common Symptoms
As the senior technician at M.S. Motor, I see these sensors fail quietly. The primary function of the Air Quality Sensor (AQS), designated as A32n1 in the wiring diagrams, is to detect exterior pollutants like NOx and CO. When high levels are detected, it signals the KLA/AAC (Automatic Air Conditioning) control unit to automatically close the fresh air flap and engage recirculation mode, protecting cabin occupants from traffic fumes.
A failure of this sensor will not trigger a check engine light. The failure is subtle, manifesting as a loss of a luxury convenience feature.
Common Symptoms:
- Automatic air recirculation mode no longer engages when behind other vehicles or in tunnels.
- Noticeable exhaust fumes and outside odours entering the cabin while the climate control is in "Auto".
- Manual operation of the recirculation button still works, but the system fails to manage it automatically.
Stored Fault Codes (retrieved with STAR/Xentry):
B1265- Communication with component A32n1 (Air quality sensor) has a malfunction.- Faults indicating an open circuit, short circuit, or implausible signal from the sensor.
Introduction
Restore the intelligent climate system of your E-Class with a Genuine Mercedes-Benz Air Quality Sensor. Sourced from original vehicles, each unit is meticulously inspected and bench-tested by our technicians to ensure it responds accurately to simulated pollutant levels. This provides a cost-effective and reliable path to reinstating the full functionality and comfort of your vehicle's automatic air recirculation system.
Product Details
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Brand: Mercedes-Benz
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Model Compatibility: W211 E-Class, C219 CLS-Class
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Part Name: Air Quality Sensor (AQS) / Schadstoffsensor
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Condition: Genuine Used (Tested Working)
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Notes: This sensor is a critical input for the KLA/AAC control module. It is typically located in the fresh air intake plenum beneath the windscreen. A faulty sensor defaults the system to fresh-air mode, disabling automatic protection from outside pollutants.
Shipping
Location: Kuala Lumpur, Malaysia Shipping: West Malaysia RM50 (Estimate) / East Malaysia RM80 (Estimate) Delivery: 1-2 working days Packaging: Secure anti-static packaging, heavy-duty shock absorption. (We send actual photos/videos of the unit and packaging before shipping)
Warranty and Return Policy
- 30-day exchange warranty from the date of receipt.
- Proof of professional installation by a qualified workshop is required for warranty claims.
- No returns if the item is opened, modified, tampered with, or damaged due to incorrect electrical wiring.
- Exchange only for confirmed internal electronic defects.
How to Order
- WhatsApp us to confirm compatibility with your specific VIN.
- Send your chassis number or a clear photo of your old unit label.
- Confirm order details and stock availability.
- Receive actual product photos and diagnostic test confirmation.
- Make payment via bank transfer.
- Item is shipped immediately with tracking details provided.
Contact Us
Ready to order or have questions? Tap the WhatsApp button to chat with our team directly.
Price Notice
Price is estimated only. Actual price depends on current stock levels, specific part number revisions, and unit condition. Please WhatsApp us for a formal quote.
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