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VOLKSWAGEN 373.VW1N13 Exhaust Fluid Tank

fits model: Passat. make: Volkswagen. year: 2013.

373.vw1n13 Volkswagen Passat 2013 Exhaust Fluid Tank 3905154

( Part Type: Fluid Exhaust Tank ), ( Conditions Options: Def Tank Only ), ( Genuine Oem: Yes ), ( Ipn: 373.vw1n13 )

Review VOLKSWAGEN Exhaust Fluid Tank fits PASSAT 2013

The **Volkswagen 373.VW1N.13 Exhaust Fluid Tank** is a critical component of the **2013 Volkswagen Passat s Selective Catalytic Reduction (SCR) system**, designed to store and dispense **AdBlue (urea solution)** during operation to meet stringent emissions regulations. This high-quality, factory-original part is engineered to seamlessly integrate into the vehicle s exhaust aftertreatment system, ensuring optimal performance and compliance with Euro 5 and Euro 6 emissions standards. Crafted from durable, corrosion-resistant materials, the tank features a robust construction with precise fittings and a secure mounting system, allowing for reliable installation without compromising the vehicle s structural integrity. The tank s transparent or semi-transparent design enables easy visual inspection of the AdBlue level, helping drivers monitor fluid levels and prevent potential system malfunctions. With a capacity tailored to the Passat s specific requirements, this tank ensures a consistent supply of exhaust fluid to the **Diesel Exhaust Fluid (DEF) injector**, which atomizes the AdBlue into the exhaust stream to reduce harmful nitrogen oxide (NOx) emissions. Whether replacing a worn-out or damaged original component or upgrading during routine maintenance, this **OEM-quality exhaust fluid tank** guarantees compatibility, longevity, and peace of mind, supporting the Passat s efficient and eco-friendly operation while maintaining optimal engine performance.

Buying a **Volkswagen Passat 2013 (373.VW1N13) with an exhaust fluid tank** (also known as an AdBlue tank) involves understanding the implications of this modification, as it is not standard on all models, particularly those without diesel particulate filters (DPF) or selective catalytic reduction (SCR) systems. Below is a detailed breakdown of the pros and cons, followed by a conclusion and recommendation.

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### **Pros of Adding an Exhaust Fluid Tank to a 2013 Passat (373.VW1N13)**

1. **Compatibility with Future Emissions Regulations**

- If you plan to keep the vehicle long-term or drive in regions with stricter emissions standards (e.g., Europe, certain U.S. states, or areas with low-emission zones), adding an exhaust fluid system ensures compliance with **Euro 5 or Euro 6 emissions norms**. Without it, the vehicle may fail emissions tests or be restricted from certain areas.

2. **Potential for Diesel Particulate Filter (DPF) Retrofit**

- Some 2013 Passats (especially those with **2.0L TDI engines**) were originally equipped with DPF systems, which require AdBlue for regeneration. If your vehicle lacks this system but you want to retain diesel performance, retrofitting an AdBlue tank could allow for a DPF installation later, improving fuel efficiency and reducing soot buildup.

3. **Extended Engine Lifespan in Certain Conditions**

- AdBlue helps reduce **nitrogen oxide (NOx) emissions**, which can contribute to engine wear over time by promoting cleaner combustion. In high-mileage or heavy-duty driving scenarios, this may indirectly benefit engine longevity.

4. **Resale Value in Emissions-Compliant Markets**

- In regions where emissions-certified diesel vehicles are in demand (e.g., parts of Europe or Asia), a Passat with an AdBlue system may retain higher resale value than one without it.

5. **Future-Proofing for Hybrid or Mild-Hybrid Conversions**

- Some aftermarket or dealership conversions (e.g., adding mild-hybrid systems) may require AdBlue compliance. Having the infrastructure in place could simplify such upgrades later.

6. **Avoiding Modification Penalties**

- In some countries, driving a diesel vehicle without emissions compliance can result in fines or vehicle impoundment. Adding the system upfront avoids legal risks.

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### **Cons of Adding an Exhaust Fluid Tank to a 2013 Passat (373.VW1N13)**

1. **Non-Standard Modification for Most 2.0L TDI Engines**

- The **2.0L TDI (CR) engine** in the 2013 Passat (373.VW1N13) was **not originally equipped with an AdBlue system** unless it was a **high-output or commercial variant** (e.g., R-Line or TDI 140 ). Retrofitting requires additional components (injectors, sensors, ECU reprogramming), which may not be officially supported by Volkswagen.

2. **ECU and Software Limitations**

- The vehicle s **Engine Control Unit (ECU)** may not be programmed to recognize or manage an AdBlue system. Retrofitting would require **third-party ECU tuning**, which can be unreliable, void warranties, or even damage the engine if not done correctly. Volkswagen does not officially support aftermarket AdBlue installations.

3. **Increased Maintenance and Cost**

- AdBlue requires **regular refills** (typically every **1,000 1,500 miles** or **10 15% of diesel fuel consumption**). You ll need to:

- Purchase **AdBlue** (a urea-water solution) separately.

- Monitor the tank level (low AdBlue can trigger warning lights or restrict performance).

- Potentially deal with **leaks or clogs** in the new system.

- Over time, this adds **unexpected maintenance costs** compared to a standard diesel.

4. **Reduced Fuel Efficiency**

- AdBlue does not improve fuel economy; in fact, the **additional weight of the tank and fluid** may slightly reduce efficiency. The system also introduces **minor parasitic losses** from the injectors and pumps.

5. **Potential for Engine Damage if Misused**

- If AdBlue is **not used correctly** (e.g., running low or using contaminated fluid), it can cause:

- **DPF clogging** (if retrofitted with one).

- **Injector or sensor failures** due to urea residue.

- **ECU errors** if the system malfunctions.

- Unlike standard diesel systems, AdBlue-related issues are harder to diagnose without specialized tools.

6. **Decreased Resale Value in Non-Compliant Markets**

- In regions where **AdBlue is not required** (e.g., many U.S. states outside California), a modified Passat may **lose value** because buyers prefer simpler, non-emissions-controlled diesels. Potential buyers may see it as a "junkyard special."

7. **Risk of Voiding Warranty (If Applicable)**

- If the vehicle is still under warranty, **aftermarket modifications (including AdBlue retrofits)** can void coverage. Volkswagen may refuse repairs if they determine the modification contributed to a failure.

8. **Limited Aftermarket Support**

- Unlike standard diesel components, **AdBlue systems are niche**. Finding qualified mechanics to install, service, or troubleshoot the system can be difficult, especially outside major cities.

9. **Environmental and Practical Drawbacks**

- AdBlue **degrades over time** and must be replaced periodically. Spills can harm vegetation or soil, requiring careful handling.

- The system adds **complexity** to the vehicle, making repairs or diagnostics more time-consuming.

10. **No Performance Benefit**

- Unlike turbo upgrades or exhaust modifications, an AdBlue system **does not improve power, torque, or acceleration**. It only ensures emissions compliance.

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### **Conclusion**

Adding an exhaust fluid (AdBlue) system to a **2013 Volkswagen Passat (373.VW1N13) with a 2.0L TDI engine** is a **highly specialized and risky modification** unless absolutely necessary. The decision hinges on your **specific use case, location, and long-term plans** for the vehicle.

- **Worth Considering If:**

- You **must comply with strict emissions laws** (e.g., driving in Europe, certain U.S. states, or low-emission zones).

- You plan to **retrofit a DPF later** and want the infrastructure in place.

- You are **prepared for increased maintenance costs** and potential ECU tuning challenges.

- You have **access to a skilled mechanic** experienced with AdBlue systems.

- **Not Worth It If:**

- You **do not need emissions compliance** in your area.

- You **prioritize simplicity and lower maintenance** over future-proofing.

- You **plan to sell the vehicle soon**, as the modification may deter buyers in non-compliant markets.

- You **cannot afford potential ECU reprogramming or system failures**.

---

### **Recommendation**

1. **Check Your Specific Model s Original Configuration**

- Confirm whether your **2013 Passat (373.VW1N13) was originally equipped with an AdBlue system**. Some high-output or commercial variants (e.g., TDI 140 or R-Line) may have had it from the factory. If so, the system may already be installed, and you only need to ensure proper maintenance.

2. **Consult a Volkswagen Specialist**

- If retrofitting is necessary, **visit an authorized VW dealership or a diesel emissions specialist** to assess feasibility. They can determine if your ECU supports AdBlue and whether a **third-party retrofit kit** is viable.

3. **Consider Alternative Solutions**

- If emissions compliance is the goal, explore:

- **Switching to a compliant model** (e.g., a 2014 Passat with AdBlue).

- **Using a portable emissions tester** to bypass restrictions in some regions (though this is illegal in many places).

- **Converting to a non-diesel engine** (e.g., a gasoline or hybrid) if emissions are a major concern.

4. **Proceed with Caution If Retrofitting**

- If you decide to add an AdBlue system:

- Use a **reputable aftermarket kit** (e.g., from **Bosch, Continental, or a VW-approved supplier**).

- Have the **ECU flashed or reprogrammed** by a professional to recognize the new system.

- Budget for **regular AdBlue refills** and potential future repairs.

- Document all modifications in case of warranty or insurance issues.

5. **Alternative Approach: Buy a Compliant Vehicle**

- If possible, **purchase a 2014 or newer Passat**, which was **standardly equipped with AdBlue systems** for emissions compliance. This avoids retrofitting entirely and ensures long-term reliability.

6. **Evaluate Long-Term Costs**

- Weigh the **upfront cost of retrofitting** against the **ongoing expenses** (AdBlue purchases, potential repairs, and reduced resale value). If the vehicle is primarily for **short-term use or local driving**, the modification may not be justified.

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### **Final Verdict**

For the **

Details:

DEF TANK ONLY S42. This part is covered by our 90 Day Money Back Guarantee. PASSAT 2013 Exhaust Fluid Tank 3905154: Part Information This part is from a with 137000 miles on it.

part #: 373.vw1n13 price

  • $282.13

specifications fueltanksysteme:

  • for models: Passat
  • for makes: Volkswagen
  • for years: 2013
  • part type: Fluid Exhaust Tank
  • conditions options: Def Tank Only
  • genuine oem: Yes
  • ipn: 373.vw1n13

offer fueltanksysteme:

  • options: Ship-to-home
  • started: May 14, 2026
  • quantity: 1
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  • condition: Used

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for models: passat, for makes: volkswagen, for years: 2013, part type: fluid exhaust tank, conditions options: def tank only, genuine oem: yes,
manufacturer: volkswagen, category: auto parts > car truck parts accessories > air fuel delivery > fuel tanks filler necks, sku: 24426224472019751,
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2 offers $282.13–$282.13 USD
  • Used. Offer #1 priced at $282.13 + $0.00 shipping estimate = $282.13* total. DEF TANK ONLY S42 This part is from a 2013 PASSAT with 137000 miles on it.FREE SHIPPING
  • Used. Offer #2 priced at $282.13 + $0.00 shipping estimate = $282.13* total. This part is from a 2013 PASSAT with 157000 miles on it.FREE SHIPPING

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