The AdBlue DEF Injector Feed Supply Line is a critical supply line for the AdBlue (DEF – Diesel Exhaust Fluid) system on select Volkswagen diesel vehicles, specifically VW Jetta and VW Beetle models equipped with SCR (Selective Catalytic Reduction) emissions control. This line carries AdBlue fluid from the dosing module to the injector, enabling the correct amount of reductant to be sprayed into the exhaust stream, where it helps convert harmful nitrogen oxides (NOx) into harmless nitrogen and water vapour. A properly functioning feed line is essential for accurate AdBlue delivery and for keeping your vehicle emissions compliant and running smoothly.

OEM Number: 5C0131984B, 5C0-131-984-B, 5C0131984E, 5C0-131-984-E

Quantity: 1

Product Details

INJECTOR FEED LINE DIESEL EXHAUST FLUID (DEF)

DIESEL EXHAUST FLUID (DEF) INJECTOR FEED LINE

DIESEL FLUID SUPPLY LINE 5C0-131-984-B

INLET HOSE INJECTOR FEED LINE DIESEL EXHAUST FLUID

For the Following Cars 

VW Beetle 2.0L DIESEL A/T TDI Hatchback 2015.0
VW Beetle 2.0L DIESEL M/T TDI Hatchback 2015.0
VW Beetle Convertible 2.0L DIESEL A/T TDI 2015.0
VW Beetle Convertible 2.0L DIESEL M/T TDI 2015.0
VW Jetta 1.8L A/T FWD SE Sedan 2015.0
VW Jetta 1.8L A/T FWD SEL Sedan 2015.0
VW Jetta 1.8L A/T FWD Sport Sedan 2015.0
VW Jetta 1.8L M/T FWD SE Sedan 2015.0
VW Jetta 1.8L M/T FWD SEL Sedan 2015.0
VW Jetta 1.8L M/T FWD Sport Sedan 2015.0
VW Jetta 1.8L PZEV A/T FWD SE Sedan 2015.0
VW Jetta 1.8L PZEV A/T FWD SEL Sedan 2015.0
VW Jetta 1.8L PZEV A/T FWD Sport Sedan 2015.0
VW Jetta 1.8L PZEV M/T FWD SE Sedan 2015.0
VW Jetta 1.8L PZEV M/T FWD SEL Sedan 2015.0
VW Jetta 1.8L PZEV M/T FWD Sport Sedan 2015.0
VW Jetta 2.0L A/T FWD S Sedan 2015.0
VW Jetta 2.0L DIESEL A/T FWD TDI S Sedan 2015.0
VW Jetta 2.0L DIESEL A/T FWD TDI SE Sedan 2015.0
VW Jetta 2.0L DIESEL A/T FWD TDI SEL Sedan 2015.0
VW Jetta 2.0L DIESEL M/T FWD TDI S Sedan 2015.0
VW Jetta 2.0L DIESEL M/T FWD TDI SE Sedan 2015.0
VW Jetta 2.0L DIESEL M/T FWD TDI SEL Sedan 2015.0
VW Jetta 2.0L M/T FWD Base Sedan 2015.0
VW Jetta 2.0L M/T FWD S Sedan 2015.0
VW Jetta GLI 2.0L LEV A/T FWD GLI SE Sedan 2015.0
VW Jetta GLI 2.0L LEV A/T FWD GLI SEL Sedan 2015.0
VW Jetta GLI 2.0L LEV M/T FWD GLI SE Sedan 2015.0
VW Jetta GLI 2.0L LEV M/T FWD GLI SEL Sedan 2015.0
VW Jetta GLI 2.0L SULEV A/T FWD GLI SE Sedan 2015.0
VW Jetta GLI 2.0L SULEV A/T FWD GLI SEL Sedan 2015.0
VW Jetta GLI 2.0L SULEV M/T FWD GLI SE Sedan 2015.0
VW Jetta GLI 2.0L SULEV M/T FWD GLI SEL Sedan 2015.0 

Our SKU: TVW5C0131984B_94

All our Diesel Exhaust Fluid (DEF) Injector feeds are OEM quality and reliable after-market car parts. This Diesel Exhaust Fluid (DEF) Injector Feed is specifically compatible with. VW: JETTA, BEETLE.

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’s 5C0131984B and 5C0131984E specifications — this ensures a direct replacement that matches the original line in form, fit and function.

• Ensures Accurate AdBlue Delivery: Provides a reliable supply path for AdBlue fluid to the injector, supporting precise dosing for effective SCR operation and reduced NOx emissions.

• Prevents Emissions Faults: A damaged, blocked or leaking injector feed line can trigger emissions warnings, reduce SCR performance or lead to engine derate; replacing it helps restore normal operation.

• Durable Construction: Built to withstand hot under-bonnet conditions, vibration and chemical exposure typical of diesel exhaust treatment systems.

• Targeted Compatibility: Commonly used on VW Jetta and VW Beetle diesel models equipped with SCR — always verify the OEM number on your original part before purchasing.

Frequently Asked Questions (FAQs)

 

Q1: What is an AdBlue (DEF) injector feed supply line?
A: It’s a specialised pipe that carries Diesel Exhaust Fluid (AdBlue) from the dosing module to the SCR injector where it’s injected into the exhaust gas stream to help reduce NOx emissions.

Q2: Why is this line important?
A: The SCR system relies on precise AdBlue dosing — if the feed line is blocked, cracked or leaking, the injector may not get the correct fluid supply, leading to emissions faults, warning lights or limp engine behaviour.

Q3: Which vehicles use OEM part numbers 5C0131984B / 5C0131984E?
A: These part numbers are used on VW Jetta and VW Beetle DIESEL models with SCR systems (e.g., 2015 TDI models). Always check your vehicle’s existing part number to confirm fitment.

Q4: What are typical symptoms of a faulty AdBlue feed line?
A: Signs include SCR warning lights, reduced SCR function, increased NOx emissions on self-diagnostics, or engine protection mode — often caused by leaks or blockages.

Q5: Can I replace this myself?
A: Replacing the AdBlue injector feed line requires careful handling of the SCR plumbing to avoid contamination. Professional installation is recommended to ensure correct sealing and system integrity.