Genuine OEM 8R0131969G - Diesel Exhaust Fluid (DEF) Pump

Product Overview

This Genuine OEM Audi 8R0131969G Diesel Exhaust Fluid (DEF) pump is the factory-specification component for selective catalytic reduction (SCR) systems on Audi diesel vehicles. It fits Audi Q5 TDI (8R) and A8 L TDI (D4) models from 2014 to 2016, delivering DEF from the tank to the SCR catalyst with precision metering. As a genuine OEM part, it meets Audi's exact engineering standards and carries full factory warranty support through Audi dealerships.

This DEF pump is sold individually. Verify your vehicle's DEF system configuration before ordering, as pump replacement may be part of a larger SCR service.

Symptoms of a Failing DEF Pump

• Check Engine Light or DEF system warning on the instrument cluster
• Reduced engine power or limp-mode operation
• DEF level does not register on the dashboard gauge
• Engine does not start or shuts down unexpectedly
• Hissing or abnormal pump noise from the DEF tank area
• DEF fluid leaking from the tank or pump assembly

Cross Reference Numbers

This Genuine OEM 8R0131969G is equivalent to or replaces the following part numbers: 8R0131969G.

Vehicle Compatibility

This part fits the popular models below. For Fitment Confidence, please use the vehicle selector tool above to verify exact compatibility for your vehicle.

• Audi Q5 TDI Premium Plus, Prestige 3.0 V6 Diesel (8R): 2014–2015
• Audi A8 L TDI 3.0 V6 Diesel (D4): 2015–2016

This may also fit other applications. Please use the vehicle selector tool to verify fitment.

Often Replaced Together

For a complete DEF system service, many owners replace the following at the same time:

• DEF fluid (required for system operation and SCR catalyst function)
• DEF tank filler neck and cap assembly
• SCR catalyst and dosing module
• Fuel filter and water separator (maintenance item during DEF service)

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Frequently Asked Questions

How do I know if my Audi Q5 or A8 TDI needs a new DEF pump?

The most common warning sign is a DEF system fault message on the instrument cluster, often accompanied by a Check Engine Light. You may also notice the DEF level gauge fails to register even after adding fresh fluid, or the vehicle enters limp mode and loses power. Some owners report hearing a buzzing or grinding noise from the DEF tank area. If you observe any of these symptoms, have the DEF system scanned with a diagnostic tool to confirm pump failure before replacement.

What is the DEF pump's role in the SCR system?

The DEF pump draws Diesel Exhaust Fluid from the tank and pressurizes it to the dosing module, which injects a precise amount into the exhaust stream upstream of the SCR catalyst. This chemical reaction converts harmful nitrogen oxides (NOx) into harmless nitrogen and water, allowing the vehicle to meet emissions standards. Without a functioning pump, DEF cannot reach the catalyst, causing the engine to enter limp mode or shut down entirely.

Can I replace the DEF pump myself, or do I need a dealer?

DEF pump replacement requires removal of the DEF tank, which involves working beneath the vehicle and managing fluid spillage. While experienced DIY technicians can perform the job with basic hand tools, many owners opt for dealership service to ensure proper installation, fluid handling, and system diagnostics. After replacement, the DEF system should be bled of air and tested to confirm proper operation.

Why is this a Genuine OEM part important for DEF systems?

DEF is a corrosive fluid that demands precise pump engineering and material compatibility. Genuine OEM pumps are engineered to withstand DEF's chemical properties and deliver exact flow rates required by Audi's SCR dosing module. Aftermarket or counterfeit pumps may fail prematurely or deliver incorrect DEF metering, compromising emissions control and engine performance. Genuine parts also qualify for Audi dealership warranty coverage.

How often does a DEF pump typically need replacement?

Under normal operating conditions, a DEF pump is designed to last the life of the vehicle. However, contaminated DEF fluid, water ingress into the tank, or electrical faults can shorten pump life significantly. Regular DEF fluid top-ups with genuine Audi DEF (not aftermarket substitutes) and keeping the filler cap sealed help extend pump longevity. If your vehicle has high mileage or has been driven with a low DEF level, pump wear is more likely.

Is the 8R0131969G pump the same for all Q5 and A8 TDI models in this range?

This pump is specific to Q5 TDI (8R) models from 2014–2015 and A8 L TDI (D4) models from 2015–2016. Always verify your vehicle's model year, body code, and engine configuration before ordering, as DEF pump designs vary across generations and markets. Use the vehicle selector tool to confirm fitment for your specific vehicle.

Closing Paragraph

Order Genuine OEM 8R0131969G today to restore full DEF system function on your Audi Q5 TDI or A8 L TDI. In-stock orders ship same or next business day from our U.S. warehouse, and our fitment team is one call away if you need help confirming the right part for your Audi.

Note: All information on this page and in the FAQ is for general reference only. Verify fitment and consult a professional as needed. eEuroparts.com is not responsible for incorrect part selection or installation.