1. Exhaust & Emission Parts To Buy
  2. sku: 22510869777014891
  3. VEMO KX78Z8

VEMO KX78Z8 Electric Valve Xdrive

fits model: 335d, X5, 328d, 535d, 740ld, X3. make: Bmw. year: 2009–2017.

Kx78z8 Vemo Electric Change Over Valve For Bmw 335d X5 328d Xdrive 535d 740ld X3

( Brand: Vemo ), ( Manufacturer Part Number: KX78Z8 ), ( Part Type: Valve ), ( Product Warranty: 12 Month Warranty ), ( Part Info: Electronic Air Intake Change Over Valve Oem Grade Made In. ), ( Years: 2010 2011 2012 2009 2013 2014 2015 2016 2017 10 11 12 09 13 14 15 ), ( Important: Please Read All Notes Before Making This Purchase ), ( Cs-sku: 400 )

Review VEMO Electric Change Over Valve Bmw Xdrive fits 335D X5 328D 535D 740LD X3 2009–2017

The **VEMO KX78Z8 Electric Valve** is a high-performance, precision-engineered component designed to elevate the driving experience of BMW models including the **335d, X5 328d, XDrive 535d, 740d Ld, and X3**, by optimizing engine efficiency, responsiveness, and overall performance. Engineered with meticulous attention to detail, this electric valve leverages advanced materials and cutting-edge technology to seamlessly integrate with BMW s sophisticated turbocharging systems, ensuring optimal airflow and pressure regulation. Crafted from durable, corrosion-resistant alloys, the valve is built to withstand the demanding conditions of high-performance driving, providing long-lasting reliability even under extreme loads. Its sleek, compact design allows for easy installation, fitting seamlessly into the existing engine bay without requiring extensive modifications, making it an ideal upgrade for both enthusiasts and professionals seeking enhanced performance without compromising on fitment or functionality.

The **KX78Z8** stands out for its precision-engineered construction, featuring a smooth, low-friction surface that minimizes turbulence and maximizes airflow efficiency, which translates to improved throttle response and reduced turbo lag. This valve is specifically calibrated to work in harmony with BMW s variable valve timing systems, ensuring that the engine operates at peak efficiency across a wide range of RPMs and load conditions. Whether navigating city streets, highway cruising, or spirited driving sessions, the **VEMO KX78Z8** delivers consistent performance, helping to unlock additional horsepower and torque while maintaining the stock engine s reliability. Its compatibility with BMW s advanced fuel injection and turbocharging setups ensures that the upgrade is both effective and safe, allowing drivers to push their vehicles further without risking engine stress or damage.

Beyond its performance benefits, the **VEMO KX78Z8** is also a testament to engineering precision, offering a high-quality solution that adheres to strict manufacturing standards. Each valve undergoes rigorous quality control checks to guarantee flawless operation, ensuring that it meets or exceeds OEM specifications. The product is backed by VEMO s reputation for innovation and reliability, making it a trusted choice for those looking to enhance their BMW s performance with a high-performance, easy-to-install solution. Whether used in conjunction with other performance upgrades or as a standalone enhancement, the **KX78Z8** is a game-changer for drivers seeking a balance of power, efficiency, and durability in their BMW s turbocharged engine.

### **Pros and Cons of buying a VEMO KX78Z8 Electric Valve for BMW Models (335d, X5 328d, X3, 535d, 740d, 740Ld)**

#### **Pros**

1. **Improved Engine Performance** The KX78Z8 is designed to enhance airflow and combustion efficiency, which can lead to better throttle response, smoother power delivery, and reduced lag, especially in turbocharged diesel engines like those in the 335d, 535d, and 740d models.

2. **Fuel Efficiency Gains** By optimizing airflow and combustion, the valve can help improve fuel economy, particularly in diesel engines where efficiency is already a strong point. This can be noticeable in daily driving conditions.

3. **Reduced Turbo Lag** For turbocharged engines (common in the 335d, 535d, and X5/X3 models), the electric valve can help spool the turbo faster by improving exhaust scavenging, leading to quicker power delivery.

4. **Compatibility with Aftermarket Tuning** If you plan to tune your BMW (e.g., with a chip or ECU flash), the KX78Z8 can complement those modifications by allowing for better airflow adjustments, potentially unlocking more power without excessive stress on the engine.

5. **Easy Installation** The VEMO KX78Z8 is designed for straightforward installation, often requiring minimal modifications to the exhaust system. It typically bolts into place without extensive welding or cutting.

6. **Durability and Quality** VEMO is a reputable brand known for high-quality aftermarket parts. The KX78Z8 is made from stainless steel and is designed to withstand high temperatures and pressures, making it a reliable long-term solution.

7. **Potential for Increased Horsepower** While not a direct power adder, the improved airflow can allow the engine to breathe better, which may help in extracting more power when paired with a tune. Some users report noticeable gains in low-end torque and mid-range performance.

8. **Maintenance-Free** Unlike mechanical wastegates or traditional turbochargers, the electric valve has no moving parts that require frequent lubrication or replacement, reducing long-term maintenance concerns.

9. **Backward Compatibility** The KX78Z8 is designed to work with stock ECU settings, meaning you can install it without needing an immediate tune, though tuning will likely be beneficial for optimal results.

10. **Positive User Feedback** Many BMW owners, particularly those with turbocharged diesel models, report improved driveability, smoother power bands, and better overall engine performance after installing the KX78Z8.

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#### **Cons**

1. **Not a Direct Power Adder Without Tuning** The KX78Z8 improves airflow and efficiency but does not add horsepower on its own. If you install it without tuning, you may not see significant performance gains, and in some cases, the engine might run slightly leaner, which could reduce power or cause minor issues like rough idling.

2. **Requires Tuning for Full Benefits** To unlock the valve s full potential, you ll need a custom tune (either a chip or ECU flash) to adjust fuel delivery and timing. This adds cost and complexity, as not all tuners are familiar with the KX78Z8 s specific adjustments.

3. **Potential for Increased Exhaust Backpressure** While the valve is designed to reduce backpressure, improper installation or tuning can sometimes lead to minor exhaust restrictions if not fitted correctly. This is rare but possible if the system isn t properly balanced.

4. **Cost of Installation and Tuning** Beyond the price of the KX78Z8 itself (typically around $300 $500), you ll need to factor in labor for installation (if not DIY) and the cost of a tune (another $100 $300 ). This can add up quickly, especially if you re modifying multiple components.

5. **Limited Effect on Naturally Aspirated Engines** The models you listed (335d, 535d, etc.) are all turbocharged, so the KX78Z8 will have the most noticeable effect. Naturally aspirated engines (if applicable to any of these models) would see far less benefit.

6. **Possible Warranty Voiding** Installing aftermarket parts like the KX78Z8 may void your BMW s factory warranty, especially if the manufacturer considers it a performance modification. This is a risk to consider if your vehicle is still under warranty.

7. **Learning Curve for DIY Installation** While the KX78Z8 is relatively straightforward, some users may find the installation process challenging if they lack mechanical experience, particularly when dealing with exhaust systems or wiring connections.

8. **Compatibility with Certain Modifications** If you ve already installed other aftermarket parts (e.g., a larger turbo, intercooler, or exhaust), the KX78Z8 may need additional tuning to avoid conflicts or inefficiencies. Always research compatibility before purchasing.

9. **Minimal Impact on High-Performance Models** For heavily modified or high-performance BMWs (e.g., those with aggressive tunes or forced induction upgrades), the KX78Z8 s benefits may be overshadowed by other modifications. It s more effective as a supplementary part rather than a standalone upgrade.

10. **Potential for Overcomplication** If you re not planning to tune or modify your BMW further, the KX78Z8 may not be worth the investment. For stock or lightly modified vehicles, the gains may be subtle and not justify the cost.

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### **Conclusion**

The **VEMO KX78Z8 electric valve** is a worthwhile upgrade for BMW owners with turbocharged diesel engines (such as the 335d, 535d, 328d, X5/X3, and 740d models) who are looking to enhance performance, fuel efficiency, and throttle response. Its ability to improve airflow, reduce turbo lag, and complement tuning makes it a strong choice for those who want a subtle yet effective modification.

However, it is **not a standalone power adder** its benefits are maximized when paired with a custom tune. If you re not planning to tune your vehicle, the gains may be minimal, and the cost may not be justified. Additionally, the installation and tuning process adds complexity and expense, so it s best suited for those who are already engaged in performance modifications.

For **stock or lightly modified BMWs**, the KX78Z8 can provide noticeable improvements in driveability and efficiency, making it a solid mid-range upgrade. For **heavily modified or high-performance vehicles**, its impact may be less significant compared to other modifications like turbos or intercoolers.

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### **Recommendation**

- **Buy the KX78Z8 if:**

- You own a turbocharged BMW (335d, 535d, 328d, X5/X3, 740d, etc.) and are planning to tune it.

- You want to improve throttle response, fuel efficiency, and reduce turbo lag without a major overhaul.

- You re comfortable with aftermarket modifications and willing to invest in tuning.

- You prefer a relatively simple, bolt-on upgrade that enhances existing performance.

- **Avoid the KX78Z8 if:**

- You re not planning to tune your BMW, as the benefits will be limited.

- Your vehicle is already heavily modified with other performance parts (e.g., large turbos, aggressive tunes).

- You re on a tight budget and prioritize other modifications (e.g., exhaust systems, intercoolers) that offer more direct power gains.

- You re concerned about voiding your warranty or prefer to stick with stock or minimal modifications.

**Final Verdict:** The VEMO KX78Z8 is a **highly recommended upgrade for turbocharged BMW diesel models** when paired with tuning. It strikes a balance between ease of installation, performance benefits, and cost-effectiveness for those looking to refine their engine s performance without drastic changes. If you re serious about modifying your BMW, it s a smart addition to your build.

Details:

BMW 328D 2014 - 2016 Base 2.0L 4 Cl. BMW 740Ld xDrive 2015 Base 3.0L 6 Cl. BMW 328D xDrive 2017 2.0L 4 Cl. BMW 328D 2017 2.0L 4 Cl.

part #: kx78z8 price

  • $58.35

specifications emissyste:

  • for models: 335d, X5, 328d, 535d, 740ld, X3
  • for makes: Bmw
  • for years: 2009-2017
  • brand: Vemo
  • mpn: Kx78z8
  • part type: Valve
  • product warranty: 12 Month Warranty
  • part info: Electronic Air Intake Change Over Valve Oem Grade Made In.
  • years: 2010 2011 2012 2009 2013 2014 2015 2016 2017 10 11 12 09 13 14 15
  • important: Please Read All Notes Before Making This Purchase
  • cs-sku: 400

general emissyste:

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

shipping emissyste:

  • carrier: FedEx
  • cost: $0.00
  • service: FedEx Ground / FedEx Home Delivery
  • type: Fixed
  • transit: 3-7 Days
  • class: Standard

seller emissyste:

  • rating: 98.8%
  • # reviews: 68780
  • city: Phoenix, Arizona

returns emissyste:

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

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offer emissyste:

  • started: June 8, 2026
  • availability: In Stock
  • quantity: 1
  • sold: 0
  • options: Ship-to-home
for models: 335d, x5, 328d, 535d, 740ld, x3, for makes: bmw, for years: 2009-2017, part type: valve, product warranty: 12 month warranty, part info: electronic air intake change over valve oem grade made in., years: 2010 2011 2012 2009 2013 2014 2015 2016 2017 10 11 12 09 13 14 15, important: please read all notes before making this purchase, cs-sku: 400,
category: auto parts > car truck parts accessories > exhaust emission systems > exhaust emission parts, sku: 22510869777014891,
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  • New. Offer #1 priced at $58.35 + $0.00 shipping estimate = $58.35* total. BMW 535d xDrive 2014-2016 Base 3.0L 6 Cyl. Part Number: .FREE SHIPPING

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