For any questions please PM or email: Descriptions: The M-Tuner is the first, and only, at-home OBD...
Vendor: M-Engineering
Product Type: Performance
Regular price
Regular price
Sale price
Subtotal: $5,495.00
10 customers are viewing this product
Free Shipping

Free standard shipping on orders over $99

Returns Policy
Learn More.

For any questions please PM or email:


The M-Tuner is the first, and only, at-home OBD flashing utility! Developed by M-Engineering, M-Tuner integrates all features of the M-Logger and adds them with the ability to flash anytime, anywhere!

The Following exclusive features are included with the M-Tuner Package for 4.0L McLarens:

  • Live Map Switching
  1. This includes stage calibrations for Stage 1 & Stage 2 vehicle configuration. Remote custom tuning is available for different vehicle configurations as well.
  2. Performance Stage 1 & Stage 2 calibrations include the following map slots by default:
  3. Slot 1 - 91 Octane
  4. Slot 2 - 93 Octane
  5. Slot 3 - 100+ Octane
  6. Slot 4 - Valet (Limits boost, load, and throttle)
  7. *Please contact us at time of ordering if you wish to have different map slots.
  • Datalogging
  • Live Data
  • Clear Faults
  • Dyno Mode Enable/Disable
  • Auto Start/Stop Disable
  • Left Foot Braking
  • Kickdown Disable
  • Loud Start

More custom features for racing and motorsport applications can be added and are located under the M840T Motorsport Tuning Package. Features such as Rolling Anti-Lag, Boost by Gear, etc...

*M-Tuner requires a one time only bench procedure which requires the ECU to be sent to M-Engineering HQ.

Pro Tuning and custom calibrations are also available for those who are looking to optimize their McLaren for parts configurations or fuels not listed in our map notes.

Disclaimer: You accept responsibility and risks of any tunes and added features by M Engineering. If you are not the end user of the car, you will be solely responsible for notifying the purchaser and/or customer they also accept the responsibility and risks of these and M Engineering is not liable. M Engineering is also not liable for voided warranties due to installation of our products.

Vehicle Fitment Chart:

M840T 2017-2021
Mclaren 765LT M840T 2017-2021

If you have any fitment questions, please feel free to reach out to our team via the contact methods below. If you are contacting us for any order status updates, please give us a call, or email us. We are a lean operation bringing you the best shopping experience possible. We are working on your orders as quickly as we can. We thank you for your patience.

Please reach out to us at (310) 231-0292 for sales inquiries if you are in the United States, Canada, Mexico.
For more in-depth product questions, fitment questions, product inquiries please email our performance specialists at
All other inquiries:
Please direct your inquiries to the chat functionality on our website.

Returns Policy

If a product is ordered and not wanted, the UNUSED item can be returned for a 25% restocking fee unless otherwise specified. In some cases, we may offer the ability to return the item to us for a lesser restocking fee and then keep the balance as a store credit. To return an item, it must be in brand new condition with original packaging.

We cannot accept a return on special ordered or custom items.

Shipping is non refundable in either direction unless approved by AutoTalent. All items wanting to be return MUST be reported within 30 days of the original invoice date. No items will be returnable after 30 days. All products shipped from the AutoTalent facility are shipped via FedEx, USPS, or USPS. Some packages shipped from the manufacturer may or may not require signatures for package release.

Special Order Items

Some items may be special order specifically for the customer’s vehicle. These items generally require a deposit or paid in full. Once this deposit amount is notified to the customer and they agree to order the special order item, the deposit becomes non-refundable. These special order items cannot be returned or resold. Cancellations are not allowed on special order parts.

AutoTalent DOES NOT REFUND SHIPPING CHARGES. If you modify, install, or alter the item in any form, we cannot accept it as a return. We will not cover any expenses related to the product or installation, and you may be required to purchase a replacement.

** All cancellations that are requested that are NOT due to items not being in stock or delayed by the manufacturer are subject to a 5% processing fee. When you place an order with us we pay credit card fees that are NOT returned back to us. We will absorb these fees if we do not have the item in stock OR if you agree to the original ETA and that ETA is NOT met. If you decide to cancel for any other reason you will not receive this 5% fee back


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based.

M-Engineering M Tuner Calibration suite for Mclaren 720s/Senna/765Lt 2017-2021

M-Engineering M Tuner Calibration suite for Mclaren 720s/Senna/765Lt 2017-2021


M-Engineering M Tuner Calibration suite for Mclaren 720s/Senna/765Lt 2017-2021


Others People Also Bought