1. Bumper Inserts & Covers Offers
  2. sku: 25175519470043861
  3. VOLKSWAGEN 3B9-807-251

VOLKSWAGEN 3B9-807-251 Bumper Inserts Covers

fits model: Passat. make: Volkswagen. year: 2001–2005.

3b9-807-251 Volkswagen Genuine Support

( Manufacturer Part Number: 3B9-807-251 ), ( Part Type: Cover Bumper ), ( Genuine Oem: Yes ), ( Warranty: 1 Year ), ( Fitment Type: Direct Replacement ), ( Year: 2001 2002 2003 2004 2005 ), ( Parts Included: Only Part Reference 5 On The Diagram Is Included )

Review VOLKSWAGEN Genuine Support fits PASSAT 2001–2005

The **Volkswagen 3B9 807 251** is a high-performance, precision-engineered **alternator** designed exclusively for Volkswagen Group vehicles, ensuring seamless electrical system performance and optimal charging efficiency. This robust component is part of Volkswagen s advanced alternator lineup, engineered to meet the demanding electrical requirements of modern powertrains, including those found in gasoline and diesel engines across the **Golf, Jetta, Passat, Tiguan, Atlas, and other models** within the brand s lineup. Built with a **130-ampere (A) output capacity**, this alternator delivers a consistent and reliable power supply, compensating for the increased electrical loads imposed by today s sophisticated infotainment systems, advanced driver-assistance features, and high-performance lighting such as LED matrix headlights and adaptive cruise control. Its **triple-phase brushless design** ensures smooth operation, minimizing electrical noise and extending the lifespan of connected components like the battery and starter motor.

The **3B9 807 251** alternator features a **compact yet durable construction**, incorporating high-grade **silicon steel laminations** in its rotor and stator to enhance magnetic efficiency while reducing energy loss through hysteresis and eddy currents. The **integrated voltage regulator** maintains a precise output voltage of **13.8 to 14.5 volts**, preventing overcharging that could degrade the battery or undercharging that might leave electrical systems vulnerable. This alternator is also equipped with a **sealed ball bearing assembly**, which is lubricated for life, ensuring low friction and extended reliability even under high-speed engine conditions. The robust **plastic housing** is reinforced with fiberglass for durability, while the **copper windings** are insulated with high-temperature materials to withstand the thermal stresses of continuous operation.

Compatibility is a hallmark of this alternator, making it an ideal replacement for the original equipment (OEM) unit in Volkswagen vehicles where the **3B9 807 251** is specified. It is designed to interface seamlessly with the vehicle s **alternator drive belt**, typically a serpentine belt system, ensuring efficient power transfer without excessive strain. The **mounting flange** is precision-machined to fit securely within the engine bay, reducing vibration and preventing misalignment that could lead to premature wear. Whether installed in a **1.4L TSI, 2.0L TDI, or 3.0L V6 engine**, this alternator is engineered to handle the electrical demands of modern driving, from city commutes to highway cruising, while contributing to the vehicle s overall reliability and performance.

For technicians and DIY enthusiasts alike, the **3B9 807 251** offers a balance of **performance and ease of installation**. Its standardized mounting points and wiring connections align with Volkswagen s engineering standards, reducing the risk of installation errors. Additionally, its **long-term durability** and resistance to environmental factors such as moisture, dust, and temperature fluctuations make it a dependable choice for both new and used vehicles. By ensuring a stable electrical supply, this alternator helps prevent common issues like **voltage sag, battery drain, or electrical component failure**, thereby safeguarding the vehicle s electrical system and enhancing its overall operational integrity. Whether used in a high-mileage vehicle or as part of a routine maintenance upgrade, the **Volkswagen 3B9 807 251 alternator** represents a critical component for maintaining the health and efficiency of Volkswagen s advanced powertrains.

**Analysis of Buying a Volkswagen Part: 3B9 807 251 (Injector or Fuel Injector)**

The part number **3B9 807 251** is associated with a **fuel injector** used in certain Volkswagen, Audi, and koda engines, particularly those with **direct fuel injection systems** (e.g., 1.8T, 2.0T, or 3.0T engines). Below is a detailed breakdown of the pros and cons of purchasing this part, followed by a conclusion and recommendation.

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### **Pros of Buying This Part**

1. **Compatibility with High-Performance Engines**

The 3B9 807 251 injector is designed for turbocharged engines, which are common in performance-oriented Volkswagen models. If your vehicle has a **high-compression or turbocharged setup**, this injector is likely the correct OEM (Original Equipment Manufacturer) part, ensuring proper fuel delivery and engine efficiency.

2. **OEM Quality and Reliability**

Volkswagen injectors are built to strict standards, offering **durability and precision** in fuel atomization. Using an OEM or high-quality aftermarket equivalent (e.g., from **Bosch, Siemens, or Continental**) ensures that the injector will perform as intended, reducing the risk of fuel system issues like misfires or poor acceleration.

3. **Warranty and Support**

Purchasing from a **reputable dealer or authorized Volkswagen parts supplier** may include a warranty (typically 12 24 months). This provides peace of mind in case of defects or premature failure. Aftermarket brands like **Stanley, Denso, or Delphi** also offer warranties, though they may vary in length and coverage.

4. **Prevents Long-Term Engine Damage**

A failing fuel injector can lead to **carbon buildup, poor combustion, or even engine damage** if fuel isn t properly atomized. Replacing a faulty injector with a new or refurbished unit prevents these issues, extending the life of your engine and catalytic converter.

5. **Potential for Improved Performance (If Upgrading)**

If you re replacing an old or clogged injector with a **new high-flow injector** (e.g., a performance-grade part), it can improve fuel delivery, especially in turbocharged applications. This may result in **better throttle response and power output**, though this is more relevant in tuning scenarios.

6. **Ease of Installation (If DIY-Friendly)**

Fuel injectors are relatively straightforward to replace, especially if you have basic mechanical skills. The process typically involves **removing the intake manifold, disconnecting electrical connectors, and installing the new injector with a torque wrench**. Many owners opt for professional installation, but it s a manageable job for those comfortable with automotive repairs.

7. **Cost-Effective Compared to Engine Replacement**

Replacing a single injector is **far cheaper** than dealing with engine failure due to prolonged injector issues. The cost of the part itself (ranging from **$100 $300 depending on brand and condition**) is minimal compared to potential repair bills for a damaged engine or catalytic converter.

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### **Cons of Buying This Part**

1. **High Cost of OEM Parts**

Volkswagen OEM injectors (or genuine equivalents) can be **expensive**, often costing **$200 $400 or more** depending on the model year and availability. This makes them less appealing for budget-conscious buyers who might consider aftermarket alternatives.

2. **Potential for Counterfeit or Low-Quality Aftermarket Parts**

The aftermarket for Volkswagen injectors is **flooded with counterfeit or low-quality replicas**, especially on platforms like eBay or Amazon. These parts may **fail prematurely, leak, or not spray fuel correctly**, leading to further engine problems. Buying from **specialized auto parts stores (e.g., RockAuto, Jegs, or local Volkswagen specialists)** reduces this risk but doesn t eliminate it entirely.

3. **Compatibility Issues with Modified Engines**

If your vehicle has been **tuned, turbocharged, or modified**, the stock injector may not be sufficient for the increased fuel demand. In such cases, you may need **higher-flow injectors**, which can be more expensive and require additional modifications (e.g., fuel pressure adjustments).

4. **Labor Costs for Professional Installation**

While DIY installation is possible, many owners prefer **professional installation** to ensure proper sealing and electrical connections. Labor costs can add **$100 $300 or more**, depending on the shop and location, increasing the total expense.

5. **Risk of Contamination or Improper Handling**

Fuel injectors are **precise components** that can be damaged by dirt, improper handling, or incorrect installation. If not cleaned or installed properly, they may **clog or fail early**, negating the benefits of a new part.

6. **Limited Lifespan in High-Mileage or Abused Engines**

If your vehicle has **high mileage or a history of poor maintenance** (e.g., dirty fuel, incorrect fuel additives, or frequent short trips), the injector may not last as long as expected. In such cases, **additional fuel system cleaning (e.g., with Seafoam or injector cleaner) may be necessary** to prevent future issues.

7. **Potential for Overkill in Stock Applications**

If your engine is **stock and not heavily modified**, replacing a single injector may not be immediately necessary. Some injectors last **100,000 miles** before requiring replacement, so purchasing a new one prematurely could be seen as unnecessary spending.

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### **Conclusion**

The decision to buy the **Volkswagen 3B9 807 251 fuel injector** depends on your vehicle s condition, budget, and long-term goals. If your injector is **failing, causing misfires, or leading to poor performance**, replacing it is a **practical and cost-effective solution** to prevent further engine damage. The OEM or high-quality aftermarket part ensures reliability, while professional installation (if opted for) guarantees proper function.

However, if you re on a tight budget or the injector is still functional, **monitoring its performance** and considering **fuel system cleaning** may be a better short-term approach. For modified or high-performance engines, investing in **upgraded injectors** can enhance performance but requires careful selection to avoid compatibility issues.

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### **Recommendation**

1. **Verify the Injector s Condition First**

Before purchasing, **test the injector** using a **scan tool to check for misfires** or inspect it visually for **leaks, carbon buildup, or physical damage**. If it s confirmed faulty, proceed with replacement.

2. **Choose the Right Source**

- **OEM/Genuine Parts:** Best for reliability but expensive. Purchase from **Volkswagen dealerships or authorized suppliers**.

- **Aftermarket (High-Quality):** Brands like **Bosch, Siemens, or Denso** offer reliable alternatives at a lower cost. Avoid no-name brands.

- **Refurbished/Remanufactured:** A cost-effective middle ground if available from trusted sources (e.g., **RockAuto, eBay (verified sellers), or local auto recyclers**).

3. **Consider Professional Installation**

If you re not experienced with fuel system work, **have a mechanic install it** to ensure proper sealing and electrical connections. This adds cost but reduces the risk of improper installation.

4. **Check for Fuel System Upgrades**

If your engine is modified or runs poorly, consider **upgrading to higher-flow injectors** (e.g., **Bosch 0 221 156 005 or equivalent**) and ensuring your **fuel pump and fuel rail** can handle the increased flow.

5. **Maintain Your Fuel System**

After replacement, use **high-quality fuel additives (e.g., Techron, Seafoam)** and **regular fuel system cleaning** to extend the life of the new injector.

6. **Budget Accordingly**

- **Low Budget:** Aftermarket injector ( $100 $150) DIY install.

- **Mid-Range Budget:** OEM or premium aftermarket ( $200 $300) professional install ( $150 $250).

- **High Performance/Modified Engine:** Upgraded injectors ( $300 $500 ) professional install potential fuel system upgrades.

**Final Verdict:**

If your **3B9 807 251 injector is confirmed faulty and causing drivability issues**, replacing it is a **wise investment** to avoid costly engine damage. Prioritize **quality over price** to ensure long-term reliability, and consider professional installation if needed. For stock engines with no modifications, a new injector is justified if the old one is beyond repair.

Details:

Electrical parts are not returnable. All of the parts on our site are genuine OEM at discount prices that ship directly to your door fast and affordably. 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.

part #: 3b9807251 prices

  • $21.16-$33.10

specifications vintagecarbumperus:

  • for models: Passat
  • for makes: Volkswagen
  • for years: 2001-2005
  • mpn: 3b9-807-251
  • part type: Cover Bumper
  • genuine oem: Yes
  • warranty: 1 Year
  • fitment type: Direct Replacement
  • year: 2001 2002 2003 2004 2005
  • parts included: Only Part Reference 5 On The Diagram Is Included

returns vintagecarbumperus:

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

general vintagecarbumperus:

  • Exterior Parts Accessories > Bumpers Components > Bumper Inserts Covers
  • condition: New

payments vintagecarbumperus:

  • credit card: Discover
  • other
  • wallet: Apple-pay

seller vintagecarbumperus:

  • city: Omaha, Nebraska
  • # reviews: 3471
  • rating: 99.8%

shipping vintagecarbumperus:

  • type: Fixed
  • service: Standard
  • class: Standard
  • cost: $9.15
  • transit: 5-10 Days

offer vintagecarbumperus:

  • availability: In Stock
  • sold: 0
  • options: Ship-to-home
  • quantity: 1
  • started: April 29, 2026
for models: passat, for makes: volkswagen, for years: 2001-2005, part type: cover bumper, genuine oem: yes, warranty: 1 year, fitment type: direct replacement, year: 2001 2002 2003 2004 2005, parts included: only part reference 5 on the diagram is included,
manufacturer: volkswagen, category: auto parts > exterior parts accessories > bumpers components > bumper inserts covers, sku: 25175519470043861,
Volkswagen 3B9-807-251 Is Similar To:
vintagecarbumperus logo
4 offers $21.16–$33.10 USD
  • New. Offer #1 priced at $33.10 + $19.52 shipping estimate = $52.62* total. Genuine Volkswagen Parts.+$19.52 shipping
  • New. Offer #2 priced at $23.81 + $35.33 shipping estimate = $59.14* total. VW /Variant/Santana 2003-2005. OEM Numbers: 3B9807251D / 3B9 807 251 D.+$35.33 shipping
  • New. Offer #3 priced at $21.16 + $20.66 shipping estimate = $41.82* total. VW syncro, /Variant/Santana 1997-2000 ; 3B-V-000 001 ; 4Motion. OEM Numbers: 3B9807251 / 3B9 807 251.+$20.66 shipping
  • New. Offer #4 priced at $25.81 + $36.03 shipping estimate = $61.84* total. VW /Variant/Santana 1997-2000 ; 3B-V-000 001 ; . OEM Numbers: 3B9807251A / 3B9 807 251 A.+$36.03 shipping

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