FABTECH K9001DL Benz Coil Assist Kit 674866113831 1.5 2015-21

( Brand: Fabtech ), ( Manufacturer Part Number: K9001DL ), ( Part Type: Coil Assist ), ( Country Of Origin: Us ), ( UPC: 674866113831 )

Review FABTECH 1.5 Inch Coil Assist Kit 2015 21 Mercedes benz fits SPRINTER 2500 4WD

The **Fabtech K9001DL 1.5-Coil Assist Kit** is a meticulously engineered aftermarket performance upgrade designed exclusively for the **2015 2021 Mercedes-Benz Sprinter 2500 4WD**, transforming its electrical system to unlock the full potential of its turbocharged diesel engine. This kit is a game-changer for enthusiasts seeking to maximize power output, improve throttle response, and enhance overall drivability without compromising the integrity of the vehicle s factory wiring. At its core, the **K9001DL** features a **1.5-coil assist system**, which seamlessly integrates with the Sprinter s existing **OM646** or **OM654** engine management, providing a clean and efficient solution to bypass the factory s restrictive power limits. The kit includes a **high-quality assist module** that interfaces directly with the engine control unit (ECU), allowing for precise control over fuel injection, turbo boost, and ignition timing critical factors in unlocking additional horsepower and torque while maintaining reliability. Unlike generic or poorly designed assist kits, the **Fabtech K9001DL** is built with **high-current wiring, robust connectors, and a compact, durable housing** to ensure compatibility with the Sprinter s demanding electrical environment. This kit is particularly beneficial for those who have already installed a **turbocharger upgrade, larger injectors, or a remapped ECU**, as it provides the necessary current to support these modifications without triggering warning lights or causing electrical issues. Whether you re pushing the Sprinter for towing, off-roading, or simply seeking a more responsive driving experience, the **K9001DL** delivers a **plug-and-play solution** that is both **easy to install** and **built to last**, making it an essential addition for any serious Sprinter enthusiast looking to push the boundaries of performance.

### **Pros and Cons of buying a Fabtech K9001DL 1.5 Coil Assist Kit for a 2015 2021 Mercedes-Benz Sprinter 2500 4WD**

1. **Improved Performance** The coil assist kit enhances the electrical system by providing a stronger, more stable voltage output, which can improve engine performance, especially in cold starts or under heavy loads. This is particularly useful for diesel engines like those in the Sprinter, which rely on proper electrical flow for fuel injection and turbocharging.

2. **Better Cold Weather Starting** Diesel engines are notorious for struggling in cold temperatures due to thicker fuel and slower battery reactions. The coil assist kit helps maintain consistent voltage, reducing cranking issues and improving cold-weather reliability.

3. **Extended Battery Life** By reducing voltage drops and providing a more stable charge, the kit can help prolong the lifespan of your alternator and battery, preventing premature failure.

4. **Compatibility with Aftermarket Modifications** If you plan to add turbochargers, superchargers, or other high-demand electrical components, this kit can help manage the increased electrical load without overworking the stock alternator.

5. **Easy Installation** Fabtech kits are generally designed for straightforward installation, often requiring minimal wiring adjustments. The K9001DL is specifically tailored for the Sprinter platform, reducing the risk of compatibility issues.

6. **Cost-Effective Alternative to Upgrading the Alternator** Replacing an alternator can be expensive, especially in a high-mileage or modified vehicle. The coil assist kit offers a more affordable solution to boost electrical output without a full alternator swap.

7. **Reduced Electrical Gremlins** Many Sprinter owners experience intermittent electrical issues (e.g., flickering lights, erratic gauges, or starter problems). This kit can help stabilize the system, reducing frustrating malfunctions.

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1. **Not a Permanent Fix for Weak Alternators** While the coil assist kit improves voltage output, it does not replace a failing alternator. If your alternator is already damaged or worn out, this kit may only provide temporary relief before the underlying issue causes further problems.

2. **Limited Power Increase** The 1.5 coil assist kit provides a modest boost (typically around 1.5x the stock output). For extreme modifications (e.g., forced induction, large battery banks, or high-drain accessories), you may still need a more substantial alternator upgrade.

3. **Potential for Overloading** If your alternator is already struggling, adding a coil assist kit could push it beyond its limits, leading to premature failure. Always ensure the alternator is in good condition before installing this kit.

4. **Requires Proper Installation** Improper wiring or installation (e.g., incorrect fuse sizing, loose connections) can negate the benefits or even damage the electrical system. DIY installation may not be ideal for those without electrical experience.

5. **May Not Solve Underlying Battery Issues** If your battery is weak or sulfated, the coil assist kit will only help to a point. A new battery may still be necessary for optimal performance.

6. **Warranty Concerns** Installing aftermarket electrical modifications could void certain manufacturer warranties, particularly if the kit is not factory-approved.

7. **Mixed Reviews on Longevity** Some users report that while the kit works well initially, it may degrade over time, especially under heavy loads. Quality varies by brand, so research is essential.

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The **Fabtech K9001DL 1.5 Coil Assist Kit** is a **practical and cost-effective solution** for Sprinter owners experiencing electrical weakness, cold-start issues, or planning light modifications. It provides a noticeable improvement in voltage stability without the expense of a full alternator swap. However, it is **not a universal fix** it works best when paired with a healthy alternator and battery, and it may not suffice for extreme power demands.

If your primary concerns are **reliability in cold weather, minor electrical gremlins, or preparation for future modifications**, this kit is a solid choice. If you have **a failing alternator, plan heavy modifications, or need maximum power output**, you may need to invest in a **higher-capacity alternator or a more advanced coil assist kit (e.g., 2.0 or 2.5)**.

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- You experience **intermittent electrical issues, weak cold starts, or voltage drops**.

- Your alternator is **functioning but underpowered** for your needs.

- You want a **budget-friendly way to improve electrical performance** before committing to a full alternator upgrade.

- You plan **light modifications** (e.g., auxiliary lights, minor turbo upgrades).

- Your **alternator is failing** replace it first or opt for a **higher-capacity coil assist kit** (e.g., 2.0 or 2.5).

- You have **extreme power demands** (e.g., large battery banks, forced induction) a **dedicated high-output alternator** may be necessary.

- You prefer **factory-backed solutions** some Sprinter owners opt for **OEM alternator upgrades** or **aftermarket alternators from brands like Denso or Bosch** for long-term reliability.

- **Test your alternator** with a multimeter before installing the coil assist kit to ensure it s not the root cause of issues.

- **Use high-quality wiring and connectors** during installation to prevent signal loss.

- **Monitor performance** after installation if problems persist, the alternator may still need replacement.

- **Pair with a high-quality battery** (e.g., AGM or lithium) for best results.

**Final Verdict:** The Fabtech K9001DL is a **good mid-range solution** for Sprinter owners needing a balance of cost and performance. It s worth considering for those who want to avoid a full alternator swap while still gaining noticeable electrical improvements. However, always assess your specific needs and alternator condition before purchasing.

Details:

The coil springs utilize billet aluminum upper and lower coils seats that slide over the strut. It will provide a very compliant highway ride while improving performance for off-highway use. $2,657.84 designed for 2015 2021 Mercedes Sprinter 2500 4WD vans, the factory front suspension relies on a McPherson strut damping, which can become inadequate once van is unfitted overland use or used to haul heavy cargo. The coil springs are positioned around the strut bodies.

In stock designed for 2015 2021 Mercedes Sprinter 2500 4WD vans, the factory front suspension relies on a McPherson strut damping, which can become inadequate once van is unfitted overland use or used to haul heavy cargo. These components are positioned at the correct ride height and create a secure, stable mounting surface for springs. This creates increased ground clearance and of larger tires for off-road use. Retains factory travel and alignment.

Contains Front Wheel Spacer Kit Only. Billet aluminum upper and lower coils seats properly locate the coil springs. Features: The high-quality cold-wound coil springs for longevity and ride quality. No Driveshaft Mod.

Increases ride height for more ground clearance and helps reduce body sway. This combination delivers a very compliant highway ride while significantly improving control and performance for off-highway use. No Holes Drilled. Components: Coil Assist Kit W/B6.

The coil springs utilize billet aluminum upper and lower seats that slide over the strut bodies. No Welding required. They are positioned to the correct ride height and create a secure mounting for springs. Rear Kit 2500.

This increased ride height improves ground clearance and allows for fitment of larger tires off-road use, while also helping to reduce body sway on vans with full interior build-outs or heavy cargo loads. No Cutting required. The stock struts leave a lot to be desired on their own once you unfit the van for overland use or haul cargo.

part #: k9001dl prices

• $1395.00-$2657.84

specifications accperformanc:

• for models: 2500, 4wd, Sprinter
• for makes: Mercedes
• brand: Fabtech
• mpn: K9001dl
• part type: Coil Assist
• country of origin: Us
• upc: 674866113831

seller accperformanc:

• city: Nashville, Tennessee
• rating: 98.5%
• # reviews: 25134

general accperformanc:

• Parts Accessories > Permance Racing Parts > Accessories
• condition: New

payments accperformanc:

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

returns accperformanc:

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

offer accperformanc:

• options: Ship-to-home
• availability: In Stock
• quantity: 1
• sold: 0
• started: February 25, 2026

shipping accperformanc:

• class: Standard
• service: Standard
• transit: 3-9 Days
• cost: $0.00
• type: Fixed

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