10% Off DEI Promo Code (+4 Coupons in Jun 2024)

Here are today's top DEI discount codes and deals.
  • Active Offers4
  • Codes1
  • Sales3

Older / Unreliable DEI Promo Codes

  • 16% Off
    Deal
    16% Off Discount at DEI
    Save 16% Off On Design Engineering 010412 Reflect-a-cool 36" X 48" Heat Reflective Adhesive Backed Sheets
    Get Discount
  • 69% Off
    Deal
    69% Off Offer at DEI
    Enjoy 69% Off On Silicone Connector Sleeve - 2.5" I.d.
    Get Discount
  • 7% Off
    Deal
    7% Off Deal at DEI
    Save 7% Off On Design Engineering 050330 Boom Mat Speaker Baffles, 6.5" Round (Pack Of 2) , Black
    Get Discount
  • Sale
    Deal
    Save at DEI
    Just $165.99 For Boom Mat Damping Material - 12.5" X 24" 10 Sheets
    Get Discount
  • Sale
    Deal
    Save at DEI
    Reflect-a-gold™ Heat Reflective Tape - 2" X 30' For $102.99
    Get Discount
  • Sale
    Deal
    Save at DEI
    Design Engineering 010663 Easy Loom Split Sleeve Master Kit - Complete Vehicle Wire And Hose Protection For $112.99
    Get Discount
  • Sale
    Deal
    Save at DEI
    Just $7.99 For Decoupling Washers - 3/8" (9.5mm) Small - 10-pack
    Get Discount
  • Sale
    Deal
    Save at DEI
    Design Engineering 010468 Cool-tape Self-adhesive Heat Reflective Tape, 2" X 30' Roll For $31.71
    Get Discount
  • Sale
    Deal
    Save at DEI
    Just $8.99 For Easy Loom™ Line Sleeve Tool - Small
    Get Discount
  • Sale
    Deal
    Save at DEI
    Design Engineering 050202 Boom Mat Sound Damping Material With Adhesive Backing, 12" X 12.5" X 2mm (Pack Of 4) For $35.35
    Get Discount
  • Sale
    Deal
    Save at DEI
    Design Engineering 010397 Reflect-a-gold High-temperature Heat Reflective Adhesive Backed Roll, 2" X 30' Roll For $54.36
    Get Discount
  • Sale
    Deal
    Save at DEI
    Heat Shroud™ - 0.75" X 36" For $37.99
    Get Discount
  • Sale
    Deal
    Save at DEI
    Original Finish Headliner - White 1" For $266.99
    Get Discount
  • Sale
    Deal
    Save at DEI
    Cryo²™ Embroidered Cap For $9.99
    Get Discount
  • Sale
    Deal
    Save at DEI
    Boom Mat® T-shirt - 4x-large For $37.75
    Get Discount

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  • Edelbrock Performance Products coupons
    10% Off at Edelbrock Performance Products
    Save 10% Off On Replacement K&n Air Filter For Elite Series Triangular Air Cleaner #4222
    Get Discount
  • Auto Parts Warehouse coupons
    5% Off with Auto Parts Warehouse
    Receive An Extra 5% Off $100+ Store-wide
    Reveal Code

How To Never Miss a DEI Promo Code

Sign Up For DEI Email Newsletters

By signing up for DEI email newsletters you will receive discounts and promo codes sent directly from DEI as soon as they are available. These include offers exclusively for subscribers that you won't want to miss.

Check DEI Social Media Pages

Follow DEI on Facebook, Twitter and Instagram. Occasionally DEI will post new coupons and offers to their social pages.

Contact DEI Support and Ask for a Promo Code

Sometimes simply asking customer support for a DEI promo code will score you a great deal. Connect to live chat or send an email explaining how much you love DEI and you just might get a special discount.

Abandon Your Shopping Cart

Proceed to DEI and add items to your shopping cart. Just before completing your purchase, leave. If DEI's marketing team is on point, they will reach out asking you to complete your order. Often DEI will include a promo code to convince you to finish the purchase.

Use Coupon Code Browser Extensions

Coupon extensions like Honey will test codes for you on the fly when checking out at designengineering.com. These apps aren't always perfect, but when they work they can save you time and money.

DEI Promo Codes FAQ

Why doesn't my DEI Promo Code work?

There are many reasons a promo code may not work. Some of these include product exclusions, order limits, price thresholds, and other restrictions. Make sure you test all promo codes first before completing a purchase. If your cart is not discounted immediately after entering a promo code, it likely does not work.

Why does BrokeScholar list old / unreliable DEI Promo Codes?

Occasionally DEI will extend a promotion or reuse a code at a later date. If there are no active codes, try out some older ones -- they just might work!

I have a DEI Promo Code not listed on BrokeScholar, can you add it?

Of course! Fill out our contact form with the subject line "DEI Promo Code" and include all offer details. Once verified the code will be added to this page.

Does DEI offer a Student Discount?

No, DEI is not currently offering a student discount.

Does DEI offer Discounts for Teachers?

No, DEI is not currently offering a teacher discount.

Does DEI offer Black Friday and Cyber Monday deals?

Yes, DEI offers Black Friday and Cyber Monday deals. You can find all DEI Black Friday coupons and Cyber Monday deals on BrokeScholar.

How We Keep This Page Updated with The Best DEI Promo Codes

At BrokeScholar our goal is to save you money. Providing an updated, comprehensive list of promo codes for brands like DEI is a key part of this mission.

To keep this page up to date we utilize automated tools and a large team of editors to monitor every imaginable channel a DEI promo code could be discovered. Newsletters, social media posts, forums, deal websites, podcasts and radio ads– if there is a DEI promo code we will find it.

Once DEI discount codes are added to BrokeScholar, a complex ranking system involving historical data, user behavior, and human verification makes sure the best codes rise to the top of the page. This makes sure bargain hunters spend the least time finding a working coupon code for DEI.

DEI coupons
Top Discount:10% Off
Active Coupons:4
Coupon Codes:1
Total Sales:3
Updated:Last Monday

Advertiser Disclosure

BrokeScholar partners with online retailers such as Amazon, eBay and others to provide student discounts and coupons. We may be paid an affiliate commission if you use a deal from our website.

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About DEI Discounts

Currently we have 4 active DEI coupons & promo codes for June 2024. Since we began tracking DEI discounts, we've found a total of 43 coupons and deals. These include 1 promo codes, 42 sales, and no free shipping deals.

Save up to 10% off with our best DEI coupon. New Customers: 10% Off Your First Order with code FIRST10

Highest ever DEI discount: Enjoy 69% Off On Silicone Connector Sleeve - 2.5" I.d.

Latest DEI Offer: New Customers: 10% Off Your First Order with code FIRST10

How to apply Promo Codes at DEI

  1. Select a DEI promo code that fits your order. Click "Reveal Code" to copy the promo code to your clipboard.
  2. Head to designengineering.com and navigate to your shopping cart. Double check the right items are in your cart.
  3. Find the promo code box, paste your code, and click apply.
  4. Review your savings before finishing checkout. The discount should reflect in your order total.