DINANTRONICS X Performance Tuner for BMW (F8x) M3 / M4 2015-2020
S55 Engine (A)
The DINANTRONICS X is the latest iteration in Dinan's renowned line of inline tuning modules, offering advanced engine performance enhancements that go beyond the constraints of stock programming. This sophisticated device combines high-quality hardware and software to improve engine capabilities while ensuring long-term reliability and compliance with onboard diagnostic systems.
Key Features
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Performance Enhancements:
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Max Gains: Achieve up to +69 HP and +81 lb-ft of torque at the crank; +62 HP and +73 lb-ft of torque at the wheels (specifically for base model F8x M3/M4).
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Bluetooth Smart Technology:
- Offers seamless connectivity for adjusting power levels directly from your smartphone. Compatible with both Android and iOS devices, with detailed pairing instructions available in the installation resources.
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Refined Tuning Strategy:
- Compared to the entry-level DINANTRONICS SPORT, the X model connects to additional inputs and features an enhanced tuning strategy for greater power output.
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Customizable Power Levels:
- Includes 7 power levels and a bypass setting to cater to various performance needs.
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Smooth Power Delivery:
- Engineered for a seamless and predictable increase in power, ensuring a refined driving experience.
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Diagnostics and Safety Features:
- Maintains onboard diagnostics and factory safeguards, ensuring the system remains intact and functional even after dealer updates.
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Easy Installation:
- Designed for plug-and-play installation, making it accessible for users without extensive mechanical knowledge.
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Satisfaction Guarantee and Warranty:
- Backed by a 14-Day Satisfaction Guarantee and a 1-Year Limited Warranty, ensuring customer confidence in the product.
Important Notes
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Mapping Recommendations:
- Refer to the recommended mapping notice for critical operating information.
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Model Specifics:
- SKU D440-0128 is tailored for the base model F8x M3/M4. For Competition Package vehicles, please use SKU D440-0137.
| Brand |
Dinan |
| Dinan Point Value |
3 |
| Emission Code |
7 |
| Factory Rated HP |
405 (423 Measured) |
| Factory Rated Torque (lb-ft) |
406 (411 Measured) |
| Labor Time (Hours) |
1 |
| Max HP Gain |
69 @ 4500 RPM |
| Max Torque (lb-ft) Gain |
81 @ 4500 RPM |
| Peak HP |
485 @ 6000 RPM |
| Peak HP Gain |
61 @ 7000 RPM |
| Peak Torque (lb-ft) |
490 @ 4000 RPM |
| Peak Torque (lb-ft) Gain |
80 @ 4000 RPM |
| Product Type |
Inline Module |
| Warranty |
Limited 1 Year Warranty |
| UPC |
813725029337 |
| Part Number |
D440-0128 |
Fitment Chart:
| Make |
Model |
Year |
BMW
|
M3
|
2015-2018
|
|
BMW |
M4 |
2015-2020
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⚠️ California Proposition 65 Warning:
This product may expose you to chemicals known to the State of California
to cause cancer or reproductive harm.
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We are committed to providing the best value. If you find a lower advertised price from a verified vendor, we will match it. Shop with confidence knowing you’re getting the industry's lowest price.
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Project Incentives:
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We reward enthusiasts who trust us with their major projects. Use these tiered codes at checkout to apply instant savings to your order:
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• AH630 — $630 OFF $9000+
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Fitment Guarantee:
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Avoid the headache of the wrong part. If you are unsure about compatibility, contact us first. If we verify the fitment for your vehicle via email and it doesn’t fit, we will handle the exchange at no cost to you.
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Direct Consultation:
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For sales inquiries, help applying Project Incentives, or immediate assistance with a new order:
(828) 588-5888
Monday – Friday | 9am – 5pm EST
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Technical & Fitment:
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To qualify for our Fitment Guarantee, please email your vehicle’s Year, Make, Model, and any existing modifications to:
support@autohousesupply.com
Our experts will review your specifications and provide written confirmation for your build.
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For tracking updates or status inquiries on existing orders, please reach out via our Contact Form. Having your order number ready will allow us to provide the most efficient update.
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Global Inquiries:
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We proudly support builds across the US, Canada, Mexico, and worldwide. For international shipping quotes or oversized freight logistics, please contact us via the email link above.
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Secure Shipping:
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We offer FREE Ground Shipping within the 48 contiguous United States. Most in-stock orders process within 48 hours. For your security, high-value performance parts require a signature upon delivery to ensure they reach you safely.
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Transit Protection:
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Please inspect your order immediately. Damage must be reported within 48 hours. For freight/LTL items, if you cannot inspect the contents immediately, please write "Subject to Inspection" on the delivery receipt before signing.
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Flexible Returns:
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Unused items in brand-new, original packaging can be returned within 30 days. While standard refunds incur a 25% restocking fee, we will waive this fee entirely if you choose store credit or an exchange for your next upgrade.
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Exclusions:
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To ensure every customer receives brand-new, untampered components, parts that have been installed, modified, or used are non-returnable. Custom builds, special orders, and wheel/tire packages are considered final sale.
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Need assistance? Reach out via our
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Fitment Guarantee
Fitment guides and tools are helpful—but your car is unique! Some trims and options aren’t always listed, so if you want 100% confidence that a part will fit, our team is happy to double-check for you. We take the guesswork out of your purchase by standing behind our expertise.
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Verify Your Build:
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If this product doesn't list your specific vehicle data, simply reach out to support@autohousesupply.com. We will manually verify compatibility for you.
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Our Promise:
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When we confirm a fitment in writing and it doesn’t work for your application, we cover the return shipping and exchange it at no cost to you.
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Questions? Send us your
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