AUDI 078-131-831-L Secondary Air Pump Injection Hose

( Manufacturer Part Number: 078-131-831-L ), ( Part Type: Pump Hose ), ( Genuine Oem: Yes ), ( Manufacturer Warranty: 1 Year ), ( Universal Fitment: Direct Replacement ), ( Year: 2000 2001 2002 2003 2004 2005 ), ( Parts Included: Only Part Reference 12 On The Diagram Is Included )

Review AUDI Genuine Secondary Air Injection Pump Hose fits 2000–2005

The **Audi 078-131-831-L Secondary Air Injection Pump Hose** is a precision-engineered component designed to maintain optimal performance and emissions compliance in Audi vehicles equipped with the secondary air injection system (SAIS). This high-quality hose serves as a critical conduit, facilitating the precise delivery of air from the secondary air injection pump to the exhaust manifold during engine startup and warm-up phases. Crafted from durable, heat-resistant synthetic rubber with reinforced braided nylon or polyester fibers, this hose is engineered to withstand the harsh conditions of high-temperature exhaust environments while ensuring reliable, leak-free operation. Its robust construction prevents kinking, cracking, or degradation over time, even under prolonged exposure to engine heat and vibration, which is essential for preserving the integrity of the vehicle s emissions control system. The **078-131-831-L** is a direct-fit replacement part, meticulously designed to match the exact specifications of the original equipment manufacturer (OEM), including proper sizing, fittings, and routing, ensuring seamless integration with the vehicle s exhaust and air intake systems. Whether installed in a modern Audi model with a turbocharged engine or a naturally aspirated variant, this hose plays a vital role in reducing harmful emissions by introducing additional air into the exhaust stream, aiding in the breakdown of unburned fuel and minimizing harmful pollutants during the critical warm-up period. For automotive professionals and DIY enthusiasts alike, this component represents a dependable solution for restoring or maintaining the efficiency of the secondary air injection system, contributing to both compliance with emissions regulations and the longevity of the vehicle s engine components.

**Pros and Cons of buying a Audi 078-131-831-L Secondary Air Injection Pump Hose**

1. **Compatibility and Fit:** This part is specifically designed for Audi vehicles, ensuring a proper fit without modifications. It is likely to be compatible with the exact model and year your vehicle was manufactured for, reducing the risk of installation issues.

2. **Quality and Durability:** Audi parts, especially those from reputable suppliers, are generally manufactured to high standards. The hose is likely to be durable and resistant to wear, which can extend the lifespan of your vehicle s secondary air injection system.

3. **Performance:** A properly functioning secondary air injection system helps reduce emissions by injecting air into the exhaust manifold during engine startup and warm-up. This ensures cleaner combustion and can improve cold-start performance, which is critical for passing emissions tests.

4. **Prevents Further Damage:** If the existing hose is cracked, leaking, or damaged, replacing it promptly can prevent air leaks that could lead to more extensive issues, such as damage to the air injection pump or catalytic converter.

5. **Cost-Effective:** Replacing a single hose is typically much cheaper than replacing an entire air injection system or dealing with emissions-related failures. It is a straightforward and low-cost maintenance solution.

6. **Easy Installation:** As an individual component, this hose is relatively easy to replace compared to more complex systems. Many owners or even inexperienced DIYers can install it with basic tools and a bit of mechanical knowledge.

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1. **Potential Counterfeit Parts:** If purchasing from an untrusted seller, there is a risk of receiving a counterfeit or low-quality replica. Counterfeit parts may fail prematurely, leading to repeated replacements and frustration.

2. **Price Variability:** Prices for this part can vary significantly depending on the seller, brand, or whether it is new or used. Overpaying for a part that is not genuinely OEM (Original Equipment Manufacturer) quality can be a drawback.

3. **Limited Availability:** Depending on the region or supplier, this specific part may not always be in stock. This could require waiting for delivery or purchasing from a secondary source, which may not guarantee authenticity.

4. **Mismatched Parts:** Even if the part is compatible with your vehicle s make and model, there is a small chance it could be a slightly older or newer revision that does not fit perfectly. This might require additional adjustments during installation.

5. **Labor Costs:** While the part itself is inexpensive, if you choose to have it installed by a professional mechanic, labor costs could add up, especially if the job requires additional work (e.g., removing and reinstalling components to access the hose).

6. **Misdiagnosis:** If the issue with your vehicle s air injection system is not correctly identified, replacing just the hose may not resolve the underlying problem. For example, a faulty pump or clogged filters could still cause problems even with a new hose.

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The Audi 078-131-831-L secondary air injection pump hose is a practical and cost-effective solution for maintaining or repairing your vehicle s emissions system. Its compatibility, durability, and ease of installation make it a worthwhile investment for most owners. However, the potential risks of counterfeit parts, price variability, and the need for accurate diagnosis should be considered. Purchasing from a reputable supplier and ensuring the part is genuine will mitigate many of these concerns.

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If you are experiencing issues with your vehicle s secondary air injection system such as check engine lights, poor cold-start performance, or emissions failures replacing the hose with the Audi 078-131-831-L part is a logical first step. To ensure the best outcome:

1. **Verify the Part Number:** Double-check that this is the correct part for your specific Audi model and year. Consult your vehicle s manual or a trusted mechanic if unsure.

2. **Purchase from a Trusted Source:** Buy the part from an authorized Audi dealer, a reputable online retailer (e.g., RockAuto, Amazon with verified sellers, or Audi s official parts store), or a well-reviewed local auto parts shop to avoid counterfeit items.

3. **Inspect the Existing System:** Before replacing the hose, inspect the air injection pump, filters, and other components for damage or wear. Address any other issues to prevent future problems.

4. **Consider DIY Installation:** If you are comfortable with basic automotive repairs, installing the hose yourself can save labor costs. Follow the manufacturer s guidelines or a reliable online tutorial for step-by-step instructions.

5. **Test After Installation:** After replacing the hose, clear any existing error codes from your vehicle s computer and test-drive it to ensure the system is functioning correctly. Monitor for any recurring issues or warning lights.

In summary, this part is a sound investment for maintaining your vehicle s emissions system, provided you source it carefully and address any underlying issues. If you are unsure about the diagnosis or installation, consulting a professional mechanic is advisable.

Details:

Parts must be resalable and in the original packaging. Shipping Carrier substitutions may be made at our determination in an attempt to reduce shipping cost the customer. Electrical parts are not returnable.

part #: 078131831 prices

• $28.00-$138.00

specifications emissyste:

• for makes: Audi
• for years: 2000-2005
• mpn: 078-131-831-l
• part type: Pump Hose
• genuine oem: Yes
• manufacturer warranty: 1 Year
• universal fitment: Direct Replacement
• year: 2000 2001 2002 2003 2004 2005
• parts included: Only Part Reference 12 On The Diagram Is Included

payments emissyste:

• other
• wallet: Paypal
• credit card: Diners-club

seller emissyste:

• rating: 100.0%
• city: Chantilly, Virginia
• # reviews: 204

returns emissyste:

• paid by: Seller
• policy: Returns Accepted
• time: 30 Days

shipping emissyste:

• service: Standard
• class: Standard
• transit: 3-7 Days
• cost: $10.00
• type: Fixed

offer emissyste:

• options: Ship-to-home
• started: May 25, 2026
• sold: 0
• availability: In Stock
• quantity: 2

general emissyste:

• Car Truck Parts Accessories > Exhaust Emission Systems > Other Exhaust Emission Parts
• condition: New

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