DEF AdBlue Injector Feed Supply Line for Audi A3, VW Golf SportWagen 2.0L TDI (2015) | OEM 5Q0131984AG, 5Q0131984D

This DEF/AdBlue injector supply pipe for diesel-powered Audi A3 and Volkswagen Golf/SportWagen vehicles equipped with 2.0 TDI engines and SCR emissions systems. This high-quality feed line transports Diesel Exhaust Fluid (DEF/AdBlue) from the dosing module to the DEF injector, ensuring the correct amount of reductant enters the exhaust stream to effectively reduce nitrogen oxide (NOx) emissions and maintain compliance with environmental standards.

OEM Number: 5Q0-131-984-AG, 5Q0-131-984-D, 5Q0-131-984-E, 5Q0131984AG, 5Q0131984D, 5Q011984E, 5Q0131984E

Quantity: 1

THIS IS A HIGH-QUALITY AFTERMARKET PART

INJECTOR FEED LINE DIESEL EXHAUST FLUID (DEF)

 VW GOLF SPORTWAGEN 2.0L DIESEL

 AUDI A3 2.0L TDI 2015 5Q0-131-984-AG 5Q011984E

 AUDI A3 INLET HOSE INJECTOR FEED LINE DEF 5Q0131984AG

For the Following Cars 

VW Golf 2.0L DIESEL A/T TDI S Hatchback 2015.0
VW Golf 2.0L DIESEL A/T TDI SE Hatchback 2015.0
VW Golf 2.0L DIESEL A/T TDI SEL Hatchback 2015.0
VW Golf 2.0L DIESEL M/T TDI S Hatchback 2015.0
VW Golf 2.0L DIESEL M/T TDI SE Hatchback 2015.0
VW Golf 2.0L DIESEL M/T TDI SEL Hatchback 2015.0
VW SportWagen 2.0L DIESEL A/T TDI S Wagon 2015.0
VW SportWagen 2.0L DIESEL A/T TDI SE Wagon 2015.0
VW SportWagen 2.0L DIESEL A/T TDI SEL Wagon 2015.0
VW SportWagen 2.0L DIESEL M/T TDI S Wagon 2015.0
VW SportWagen 2.0L DIESEL M/T TDI SE Wagon 2015.0
VW SportWagen 2.0L DIESEL M/T TDI SEL Wagon 2015.0 

Audi A3 2.0L DIESEL A/T FWD TDI Premium Plus Sedan 2015.0
Audi A3 2.0L DIESEL A/T FWD TDI Premium Sedan 2015.0
Audi A3 2.0L DIESEL A/T FWD TDI Prestige Sedan 2015.0 

Our SKU: TVW5Q0131984AG_94

All our Diesel Exhaust Fluid Injector Feed lines are OEM quality and reliable after-market car parts. This Diesel Exhaust Fluid Injector Feed Line is specifically compatible with VW: Golf, SportWagen.

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 with 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

• OEM-Referenced Fit: Designed to meet Volkswagen/Audi part number 5Q0131984AG (also referenced as 5Q0-131-984-AG/E/D) for a direct fit on compatible 2.0 TDI diesel models — no modifications required.

• Precise AdBlue Delivery: Carries DEF fluid accurately to the SCR injector, supporting consistent reductant dosing that helps reduce harmful NOx emissions and prevent SCR-related errors.

• Restores Exhaust System Functionality: Replacing a worn, cracked or leaking injector feed line helps eliminate emissions warnings, dash fault codes and reduced SCR performance.

• Durable and Engineered for Diesel Emission Systems: Made to withstand exposure to DEF chemicals, heat, vibration and under-bonnet conditions typical in modern turbo-diesel engines.

• Targeted Application: Commonly used on Audi A3 and VW Golf/SportWagen 2.0 TDI models (e.g., CRUA engine codes around 2015 and similar model years) that specify OEM 5Q0131984AG/5Q0131984E feed lines.

Frequently Asked Questions (FAQs)

Q1: What does the AdBlue injector feed supply line do?
A: It delivers Diesel Exhaust Fluid (AdBlue/DEF) from the dosing module to the SCR injector, where it’s injected into the exhaust to help convert nitrogen oxides (NOx) into harmless nitrogen and water.

Q2: Why is this feed line important?
A: A damaged or leaking feed line can disrupt AdBlue delivery, triggering emissions warning lights, SCR fault codes and even activating engine protection modes if the DEF system cannot function properly.

Q3: Which vehicles use part number 5Q0131984AG?
A: This supply line is used on Audi A3 and VW Golf/SportWagen (2.0 TDI) diesel models where OEM references 5Q0131984AG/E/D are specified — commonly vehicles around the 2015 model year and similar applications.

Q4: What are symptoms of a failing AdBlue feed line?
A: Typical signs include SCR warning lights, check-engine lamps, increased NOx emissions, and alerts related to DEF flow or dosing accuracy.

Q5: Is this difficult to replace?
A: Replacement involves accessing the DEF plumbing around the dosing module and injector — professional installation is recommended to ensure proper sealing and avoid contamination of the SCR system.