Front NOx Sensor (Pre-DPF) for Audi A4 B9 2.0 TDI (8W0907807R)

Description

Check part compatibility by using our vehicle filter options below. If you find your car, this part is compatible.

Maintain precise emissions control and reliable engine performance with this NOx Sensor from D2P Autoparts, designed for the Audi A4 B9 2.0 TDI (2015-onwards) and positioned before the DPF (front NOx sensor). This OEM-compatible nitrogen oxide sensor accurately measures NOx levels in the exhaust stream prior to filtration, supplying real-time data to the ECU and SCR system. Correct NOx readings are essential for efficient combustion, correct AdBlue dosing, and preventing emissions-related warning lights or limp mode.
OEM Number: 0281007857, 0281007858, 0281008749, 8W0907807R, 8W0907807BJ, 8W0907807JJ,
Fitting Position : before soot particulate filter
Placement on the vehicle : Front, Before DPF
Number of pins : 5-pin connector
Connector Shape : oval
Voltage : 12 V
Cable Length : 1,000 mm
Thread Size : M20*1.5
Quantity : 1

Our SKU: TA8W0907807BJ_313
All our Nox Sensor For Audi A4 B9 2.0 Tdi 2015-onwards Front Before Dpf 8W0907807R are OEM quality and reliable after market car parts. This Nox Sensor For Audi A4 B9 2.0 Tdi 2015-onwards Front Before Dpf 8W0907807R is specifically compatible with Audi: A4, A4 Allroad, .
Please use our make-model-year tool to check this part’s compatibility with your vehicle. However, please note that our tool is for reference only and we recommend that you check the part number on your old unit prior to purchasing.
If you are still not sure about the compatibility of this part to your vehicle, please supply us with the VIN number or Reg number in our live chat or contact form! You can also find details on our purchasing & shipping guide here.

Key Benefits

• Accurate Pre-DPF NOx Monitoring – Measures nitrogen oxide levels before the diesel particulate filter to support precise emissions control and SCR operation.

• OEM-Compatible Direct Fit – Designed to match Audi/VW part number 8W0907807R for straightforward installation without modification.

• Restores Emissions System Performance – Helps resolve NOx-related fault codes, SCR warnings and AdBlue system issues.

• Supports Fuel & AdBlue Efficiency – Accurate sensor feedback enables optimal dosing and combustion strategy.

• Durable, Heat-Resistant Design – Built to withstand extreme exhaust temperatures and harsh operating conditions.

• Cost-Effective Aftermarket Solution – Premium quality performance at a competitive price compared with dealer parts.

Frequently Asked Questions (FAQs)

Q: What does a front (before DPF) NOx sensor do?
A: The front NOx sensor measures nitrogen oxide levels upstream of the DPF and SCR system. This data allows the ECU to calculate exhaust treatment needs and control AdBlue injection accurately.

Q: Which vehicles is this NOx sensor compatible with?
This sensor is designed for Audi A4 B9 2.0 TDI diesel models from 2015 onwards that use part number 8W0907807R. Always confirm fitment using your VIN or existing sensor number.

Q: What symptoms indicate a faulty NOx sensor?
Common signs include check-engine or emissions warning lights, increased AdBlue consumption, reduced engine performance, failed emissions tests, or the vehicle entering limp mode.

Q: Is this sensor brand new?
Yes — this is a brand-new, OEM-quality aftermarket NOx sensor supplied by D2P Autoparts.

Q: Is professional installation recommended?
Yes. NOx sensors are part of the exhaust after-treatment system; professional installation ensures correct positioning, wiring integrity and system calibration.

Q: Does this product include a warranty?
Yes — all D2P Autoparts products come with a manufacturer warranty for peace of mind.

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