- Description
- Fitment
- Refund Policy
Installing carbon fiber doors is one of the most impactful weight-saving upgrades available for the E92 M3 — the Karbonius E92 M3 Coupe Carbon Door Set delivers a saving of 13 kilograms per door compared to the OEM steel unit. Where most manufacturers treat door production as a cosmetic exercise, Karbonius designs these doors as structural safety components: the outer panels and integrated side-impact protection bars are manufactured from 100% prepreg carbon fiber and Aramid fiber (Kevlar) prepreg, providing the lowest possible weight without compromising occupant protection.
The side-impact protection bars are bonded inside the door shell using structural adhesive and secured with OEM-spec hardware. Precision robot-cut interior panel openings ensure that all OEM mechanisms — window regulators, locks, rubbers, and trim — fit and operate correctly. Every door is designed to accept all genuine anchors and fittings from the OEM unit, so the installation retains full factory functionality.
Each door is manufactured in Spain at Karbonius' facility under ISO 9001 quality management standards, individually numbered for authenticity.
What's Included
- Left and right carbon fiber door shells (set of 2)
- Integrated Aramid / Kevlar side-impact protection bars
- OEM-compatible hardware
- Numbered certificate of authenticity
Product Details
- Weight: 5.4 kg per door (vs. approx. 18–19 kg OEM) — saves approximately 13 kg per door
- 100% prepreg carbon fiber and Aramid (Kevlar) prepreg construction
- Cured in mold and autoclave for superior strength and finish consistency
- Integrated Kevlar side-impact protection bars — structural adhesive and OEM screw installation
- Robot-cut interior panel recess for precise mechanism fitment
- Exterior available primed ready to paint or in 2x2 gloss carbon; interior available in 2x2 or 4x4 carbon, gloss or matte
- Exclusive and individually numbered piece
Important Notes
- Interior panels, window regulators, rubbers, locks, and OEM trim are not included and must be transferred from the original doors
Related Products
Returns
Our policy lasts 14 days. If 14 days have gone by since your purchase, unfortunately we can’t offer you a refund or exchange. All items are subject to 15% restocking fee from the manufacturer.
To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.
Additional non-returnable items:
Gift cards
Downloadable software products
To complete your return, we require a receipt or proof of purchase.
Please do not send your purchase back to the manufacturer.
There are certain situations where only partial refunds are granted (if applicable)
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of shipping to you will be deducted from your refund. If your original order qualified for free shipping, the actual cost of shipping the item to you will still be deducted from your refund.
If you would like to start a return please click here
Refunds (if applicable)
Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.
If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within a certain amount of days.
You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of shipping to you will be deducted from your refund. If your original order qualified for free shipping, the actual cost of shipping the item to you will still be deducted from your refund.
Late or missing refunds (if applicable)
If you haven’t received a refund yet, first check your bank account again. Then contact your credit card company, it may take some time before your refund is officially posted. Next contact your bank. There is often some processing time before a refund is posted. If you’ve done all of this and you still have not received your refund yet, please contact us at info@amtuning.ca.
Sale items (if applicable)
Only regular priced items may be refunded, unfortunately sale items cannot be refunded.
Labor Fees (if applicable)
AM Tuning Canada is not responsible for, and shall not be liable for, any labor fees, installation charges, removal charges, diagnostic fees, or other service-related costs incurred by the customer or any third party in connection with the installation, removal, modification, servicing, or use of any products purchased from AM Tuning Canada. Unless expressly agreed to in writing by AM Tuning Canada, all such labor and service costs are the sole responsibility of the customer.
Exchanges (if applicable)
To start an exchange, click here
Non-refundable items
The following items are non-refundable and non-returnable once purchased: oils, fuel or oil additives, filters, tuning cables, OBDeleven products, Braum seats, spark plugs, coil packs, and similar consumable, wheel spacers, wheels bolts, license plate brackets, electronic tuning components and any other product subject to discretion of AM Tuning Canada.
Other products from brands such as MHD, Bootmod3, Ecutek, Braum racing, Novitec are also non-refundable and non-returnable.
All sales of these items are final and are subject to the policies and discretion of AM Tuning. By completing a purchase, the customer acknowledges and agrees to these terms.
