10% off sitewide
✓ Verified September 26
10% off sitewide at EngineDIY
10% off sitewide at checkout, as EngineDIY's sale page states it.
✓ RATE READ FROM AWIN
EngineDIY Coupon Codes & Cashback
5% cashback on eligible EngineDIY orders, plus 10% off sitewide when you enter code 2026 at checkout.
Why we say this
EngineDIY sells working engine model kits (V8, steam, Stirling and other types) from its US store at enginediy.com, priced in US dollars. The 5% is the default rate on EngineDIY's Awin program. The code comes from EngineDIY's own sale page, which prints it next to the words “10% OFF sitewide”.
5%
Cashback (Awin default)
Awin
Network
10% off
Sitewide, with the code
September 26
Last verified
Affiliate disclosure: we earn a commission when you buy through the links on this page, at no extra cost to you.
CASHBACK RATE
5% cashback through Awin
Awin
5%
The program's default
Returning EngineDIY customers: may be 2%
Rate evidence
EngineDIY's Awin program has a default group at 5%. It also has a 5% group for new EngineDIY customers and a 2% group for returning ones, both limited to certain partner tiers, and we cannot see from here whether an order from this page falls into them. So the page says 5% and warns repeat buyers about the 2%. The network also lists a few codes that earn no commission at all; the code on this page is not one of them. How long a visit stays attached to an order is not published for this program, so this page quotes no figure for it.
Awin network · 5% is the default rate · eligible orders, not your whole order.
Tenmomo pays you 100% of the commission EngineDIY pays us, worked out on what you pay after the code, once EngineDIY accepts the order.
If you have bought from EngineDIY before, the order may earn 2% instead of 5%.
COUPON CODE
The EngineDIY code: 10% off sitewide
The code is the four digits on the button, not a date. Check that the 10% shows in your cart total before you pay.
How we verified this code, and where our knowledge stops
EngineDIY's own sale page says, word for word, “Enjoy 10% OFF sitewide! Code: 2026”. The same code and the same 10% sit in the network listing. The brand's page also advertises larger markdowns on some items; we do not repeat a figure for those, because the listing and the brand's banner disagree on it. Whether the code applies on top of an item that is already marked down is not stated, so we do not answer it.
HOW TO CLAIM
How to claim your 5% cashback (3 steps)
1
Open EngineDIY from this page first
Use the button here. Start the visit anywhere else and your order cannot be matched to your account, so nothing comes back.
2
Add your kit, then enter the code
Enter it at checkout and check the total before you pay.
3
Cashback tracks, then confirms
Your cashback shows as pending in your Tenmomo account within a few days and is released once EngineDIY accepts the order. A returned or cancelled order earns nothing.
What “tracks” means here, and what we cannot see
The click carries the information about where your order came from. Open the store in another tab, or come back days later through a search result, and that is what goes missing, so finish in the same session. Settlement is a separate wait before the money is confirmed, and acceptance is the merchant's decision, not ours.
CODE + CASHBACK EXAMPLE
10% off plus 5% back, on one order
Example kit price$300.00
The code (−10% sitewide)−$30.00
Subtotal after the discount$270.00
Tenmomo cashback (5%)−$13.50
Your net cost$256.50
Illustrative example; $300.00 is a round number, not an EngineDIY price. You keep $43.50 of the $300.00.
Show the arithmetic
The code takes $30.00 from the $300.00 kit, leaving $270.00. The cashback is 5% of that $270.00, returning $13.50 and bringing the net cost to $256.50. The two percentages do not add into one bigger figure. If the order lands in the 2% group for returning customers, the cashback on the same order is $5.40 instead.
ABOUT THE BRAND
What EngineDIY sells, and what this page does not cover
Working engine model kits and accessories, sold in US dollars at enginediy.com.
This page covers the rate and the code. It does not assess the kits or anything the brand says about them.
The limits of this page, in full
We have not built an EngineDIY kit, and a cashback page has no business implying otherwise. What we checked is the cashback rate, the code and where the button lands. Read the brand's own product, shipping and returns pages before you buy.
HOW WE VERIFY
How we source and verify this cashback rate
TM
Verified by the Tenmomo editorial desk
The 5% is the default group on EngineDIY's Awin program; returning customers may get 2%.
The code and its 10% match EngineDIY's own sale page and the network listing.
Where nothing was published (how long a visit stays attached, when the sale ends), this page states nothing.
Full verification notes
The rate groups on EngineDIY's Awin program were read on September 26, 2026. We publish the default and name the lower returning-customer group rather than hide it.
The code and its 10% appear on the brand's sale page and in the network listing, and they agree.
No end date is printed for the code.
We checked that the path from this page still ends at enginediy.com and not at a notice that the program has closed.
Cashback becomes withdrawable only after EngineDIY accepts the order through Awin. Merchants decline orders for refunds, chargebacks and their own reasons.
If the date on this page looks old when you read it, check the rate and the code on the brand's site before relying on them.
FAQ
EngineDIY coupon and cashback — frequently asked questions
Is there an EngineDIY coupon code right now?
Yes: enter code 2026 at checkout for 10% off sitewide, as EngineDIY's sale page states it.
Is code 2026 a real code, not a date?
Yes. EngineDIY's sale page prints “Code: 2026” beside the 10% sitewide offer.
Can I use the code and still earn cashback?
Yes. The code lowers the total first, then the cashback is worked out on what you pay, so on the $300.00 illustrative example you keep $43.50.
Why might I get 2% instead of 5%?
EngineDIY's program pays 2% on some partner tiers when the buyer has ordered from EngineDIY before. We cannot see whether that applies to this page, so repeat buyers should expect it may.
How long after clicking does an order still count?
No figure is published for that, and we will not invent one. Open EngineDIY from this page and finish in the same session.
Tenmomo is a cashback site and earns affiliate commission on tracked orders; we disclose that under the FTC endorsement guides.
Last updated September 26, 2026 · Editorial & verification policy
Editorial independence
Earning a commission does not decide which rates we publish or which codes we list. The lower rate for returning buyers is printed because it can apply to you.
