Product Dimensions | 26.5 x 21.5 x 24 inches |
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Item model number | CC173EEN |
Is Discontinued By Manufacturer | No |
Minimum weight recommendation | 5 Pounds |
Maximum weight recommendation | 40 Pounds |
Minimum height recommendation | 19 Inches |
Maximum height recommendation | 30.5 Inches |
Material Type | Fabric |
Number Of Items | 1 |
Style | Car Seat |
Number of reclining positions | 5 |
Batteries required | No |
Orientation | Forward Facing, Rear Facing |
Rear-facing minimum child weight | 5 Pounds |
Rear-facing maximum child weight | 40 Pounds |
Forward-facing minimum child weight | 22 Pounds |
Forward-facing maximum child weight | 65 Pounds |
Harness type | 5-Point |
Item Weight | 12.76 pounds |
Country/Region of origin | USA |
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Cosco Mighty Fit 65 DX Convertible Car Seat, Heather Onyx
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Purchase options and add-ons
Brand | Cosco |
Installation Type | Latch |
Material | Fabric |
Color | Onyx |
Orientation | Forward Facing, Rear Facing |
About this item
- With two modes of use, this extra-comfortable LATCH-equipped Cosco Kids car seat accommodates infants from 5 pounds up to toddlers weighing 40 pounds in rear-facing mode and kids up to 65 pounds in forward-facing mode.
- The five-point harness adjusts easily from the front of the seat and features five heights and three buckle locations.
- Built-in side-impact protection keeps your little one extra secure. Designed to be just the right size, the seat takes up less space while rear-facing so parents can have more leg room.
- Three of these seats can fit side-by-side in the back seat of most cars, perfect for growing families.
- With plush padding and premium fabric, this seat gives your child an extra-comfy ride. Easy to clean, the fabric car seat cover is machine-washable and dryer-safe.
- This car seat meets or exceeds federal, ASTM, and JPMA safety standards and includes a one-year limited warranty.
- For more than 70 years, Cosco Kids has been a leading children’s products brand recognized for its dedication to safety and value. From bouncers to car seats, swings to strollers, and high chairs to play yards, Cosco Kids's essential baby products feature solid value and smart design.
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We keep the village in motion with awesome, essential gear for your kiddos designed with simplicity, affordability, and value in mind.
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Safety Information
Product Description
Get the car seat that’s designed with your family’s real life in mind. The Cosco Kids™ MightyFit™ 65 DX Convertible Car Seat keeps your child safer in the car all the way from 5-65 pounds. It’ll keep your baby comfortably rear facing up to 40 pounds, and then transitions to forward-facing mode up to 65 pounds.Not too big and not too small, the MightyFit 65 DX is designed to be the right size. In rear-facing mode, it takes up less room, which gives parents more leg room in the front seats. The car seat will also fit three across the back seat of most vehicles, which is great for growing families.MightyFit 65 DX keeps kids safer with Side Impact Protection built right in, and a 5-point harness that adjusts easily from the front of the seat. The harness features 5 heights and 3 buckle locations so you can be sure you’re giving the best fit to your growing child.The MightyFit 65 DX Convertible Car Seat is mighty comfortable for kids and convenient for parents too. Kids will love the plush padding and deluxe materials that give them an extra comfy ride. You'll love that the fabric is both machine washable and dryer safe, making this seat super easy to clean when messes happen.If your chosen vehicle happens to be an airplane, this convertible car seat has got you covered. Certified for use on aircraft, it gives your child a familiar seat during the flight. Its compact design also makes it easier to manage through airport security checks.The MightyFit 65 DX is proudly made by Cosco Kids™ in Columbus, Indiana. Made by American families for American families.
Product information
Technical Details
Additional Information
ASIN | B01ETUBQZ4 |
---|---|
Customer Reviews |
4.4 out of 5 stars |
Best Sellers Rank | #9,288 in Baby (See Top 100 in Baby) #41 in Convertible Child Safety Car Seats |
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Cosco Mighty Fit 65 DX Convertible Car Seat, Heather Onyx
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This Item ![]() Cosco Mighty Fit 65 DX Convertible Car Seat, Heather Onyx | Recommendations | |||||
Try again! Added to Cart Add to cart | Try again! Added to Cart Add to cart | Try again! Added to Cart Add to cart | Try again! Added to Cart Add to cart | Try again! Added to Cart Add to cart | Try again! Added to Cart Add to cart | |
Price | $89.99$89.99 | -12% $149.99$149.99 List: $169.99 | -10% $89.99$89.99 List: $99.99 | -25% $59.99$59.99 List: $79.99 | $74.99$74.99 | -25% $59.99$59.99 List: $79.99 |
Price Per Unit | — | $149.99 / Count | — | — | — | — |
Delivery | Get it as soon as Thursday, Apr 10 | Get it as soon as Thursday, Apr 10 | Get it as soon as Thursday, Apr 10 | Get it Apr 14 - 15 | Get it as soon as Thursday, Apr 10 | Get it Apr 14 - 15 |
Customer Ratings | ||||||
Sold By | Amazon.com | Amazon.com | Amazon.com | BABY GEAR & MORE STORE | Amazon.com | BABY GEAR & MORE STORE |
material | Fabric | — | Fabric | Polyester | Polypropylene | Plastic |
min recommended weight | 5 pounds | 4 pounds | 5 pounds | 5 pounds | 5 pounds | 5 pounds |
max. recommended weight | 40 pounds | 35 pounds | 65 pounds | 40 pounds | 40 pounds | 40 pounds |
maximum height | 30.5 inches | 32 inches | 52 inches | 40 inches | 43 inches | 40 inches |
minimum height | 19 inches | — | — | 19 inches | — | 19 inches |
rear-facing min. weight | 5 pounds | 4 pounds | 5 pounds | 5 pounds | 5 pounds | 5 pounds |
max rear facing weight | 40 pounds | — | 40 pounds | 40 pounds | — | 40 pounds |
max forward facing weight | 65 pounds | — | 65 pounds | 40 pounds | 40 pounds | 40 pounds |
min forward facing weight | 22 pounds | — | 22 pounds | 22 pounds | — | 22 pounds |
harness type | 5-Point | 5-Point | 5-Point | 5-Point | — | 5-Point |
number of height positions | 5 | 4 | 5 | 4 | — | 4 |
Videos
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Honest Review - Cosco Mighty Fit 65 DX
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NEWEST NEED - Cosco Mighty Fit 65 DX Convertible Car Seat
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Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers find the car seat spacious, fitting three across in the back, and appreciate its comfort for toddlers, with one noting the supportive head pillow. The car seat receives positive feedback for its value, weight, and appearance, being light enough for travel and having a nice design. While some customers find it easy to install, others report difficulties with installation, and opinions on sturdiness are mixed, with some finding it well-made while others describe it as flimsy.
AI-generated from the text of customer reviews
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Customers appreciate the car seat's size, noting that it fits great in small cars and accommodates up to 3 passengers across the back seat, while being more spacious than infant car seats.
"...Light and compact, but comfortable-looking for my off-the-charts heavy/tall 9 month old...." Read more
"...It’s comfortable and gives them plenty of space without feeling cramped. Ease of Cleaning..." Read more
"...The materials are great, the size is perfect, the safety ratings are reassuring, and the price is amazing! This is a bare bones seat, though...." Read more
"...little guy absolutely loves this car seat because it’s much roomier than his infant car seat. I would definitely buy again!" Read more
Customers find the car seat comfortable, particularly noting that their toddlers sit well in it, and one customer mentions its supportive head pillow.
"...Light and compact, but comfortable-looking for my off-the-charts heavy/tall 9 month old...." Read more
"...It’s comfortable and gives them plenty of space without feeling cramped. Ease of Cleaning..." Read more
"...Comfortable, cool fabric. Won't absorb heat like a dark seat if you live somewhere hot. - Plush seat! - Machine washable cover. -..." Read more
"...take up more room that way but my 6ft husband still fits comfortably in the front passenger seat with our little one behind him...." Read more
Customers find this car seat to be great, with one mentioning it works well as a "next step" option.
"...For the price, very adequate!" Read more
"This seat is plush and cool, so my kids are very comfortable in it...." Read more
"In terms of cost, I think this is a pretty great, basic car seat...." Read more
"Easy install. Nice and narrow. Light. Airplane approved. This one wins. I was momming alone with a toddler during air and road travel...." Read more
Customers find the car seat to be good value for money, though some mention it feels cheaply made for its price.
"Bought this for a travel car seat and it is nice for the price...." Read more
"...This is a bare bones seat, though. It has no convenience features like an easily adjustable no-rethread harness, or a level so you angle is correct...." Read more
"...But at the same time, you’re getting what you pay for, so value for money, I think it’s great...." Read more
"...It's starting to look kind of bad. But ultimately it's a very good car seat for the money...." Read more
Customers appreciate that the car seat is lightweight, making it easy to travel with, including on planes.
"Bought this for a travel car seat and it is nice for the price. Light and compact, but comfortable-looking for my off-the-charts heavy/tall 9 month..." Read more
"...: This car seat is incredibly lightweight, which makes it perfect for travel. It’s easy to haul around without too much effort...." Read more
"...Easy forward facing install. - Lightweight and easy to carry for travel. CONS: -..." Read more
"...For the plane it worked perfectly (for a 14 month old). It is super light to move around and narrow so it fits in the plane seat...." Read more
Customers like the car seat's appearance, describing it as nice-looking and perfectly designed, with several mentioning they love its color.
"...Plush seat! - Machine washable cover. - Cute styling! I got the aqua blue for both my son and daughter and they love it. -..." Read more
"...Pros: The Onyx color is lovely, we didn’t want anything too bright or flashy and the color in person matches the picture...." Read more
"...really like their new seats and being able face forward and look out the window. The seats are well padded and comfy. They are compact...." Read more
"...The padding feels comfortable and she looks happy sitting in it. Sounds like this carseat is better used for forward facing...." Read more
Customers have mixed experiences with installing the car seat, with some finding it easy to use and set up in both front and rear-facing positions, while others report that the instructions are horrendous and the process is insanely difficult.
"...It’s easy to haul around without too much effort. Quick Installation: Installing it front-facing is super quick and simple, which is a big win..." Read more
"...I thought it was easy to install and fits well in my car...." Read more
"...The only issue I have with this seat is that it is a huge pain to install it correctly and securely in a rear facing orientation, especially if..." Read more
"...We had missed the return window and found that it is easier to install rear facing in bucket seats (grandmas suv) and very easy to install forward..." Read more
Customers have mixed opinions about the car seat's sturdiness, with some finding it well-made and reasonably priced for its quality, while others report that it feels flimsy and unstable.
"...When we used it in a car, it wasn't great because it is a fairly low quality car seat, it sits weirdly on seats so when our son fell asleep his neck..." Read more
"...The materials are great, the size is perfect, the safety ratings are reassuring, and the price is amazing! This is a bare bones seat, though...." Read more
"...Cons: The straps twist constantly in the bucke part. I don’t know if I’m doing something wrong, but I can’t seem to stop it from happening." Read more
"...pressure to the seat while I tightened the latch strap and it was very secure, did not move more than an inch side to side and did not slip..." Read more
Reviews with images

Okay for forward facing
Top reviews from the United States
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- Reviewed in the United States on March 12, 2025Color: OnyxStyle: Car SeatVerified PurchaseBought this for a travel car seat and it is nice for the price. Light and compact, but comfortable-looking for my off-the-charts heavy/tall 9 month old. Very easy to adjust everything without tools, as long as you do it ahead of time and not in a rush. For the price, very adequate!
- Reviewed in the United States on January 13, 2025Color: OnyxStyle: Car SeatVerified PurchaseI purchased this car seat for our little one specifically for travel, and it’s been a fantastic choice.
Key Features
Lightweight: This car seat is incredibly lightweight, which makes it perfect for travel. It’s easy to haul around without too much effort.
Quick Installation: Installing it front-facing is super quick and simple, which is a big win when hopping in and out of Ubers or rental cars. I haven’t tried rear-facing, so I can’t comment on that, but the ease of front-facing installation is a huge plus for us.
Spacious: The seat is very roomy, which works well for our ever-growing toddler. It’s comfortable and gives them plenty of space without feeling cramped.
Ease of Cleaning
The cover is easy to remove, which makes cleaning straightforward. However, since it isn’t water-resistant, you’ll need to plan for drying time if there are accidents and you don’t have access to a dryer.
- Reviewed in the United States on February 15, 2017This seat is plush and cool, so my kids are very comfortable in it. The materials are great, the size is perfect, the safety ratings are reassuring, and the price is amazing! This is a bare bones seat, though. It has no convenience features like an easily adjustable no-rethread harness, or a level so you angle is correct. However, that is reflected the VERY affordable price (about $85) The only issue I have with this seat is that it is a huge pain to install it correctly and securely in a rear facing orientation, especially if you have deeply contoured seats.
PROS:
- Great rear facing height and weight limits
- Higher forward facing weight limit than almost any other seat in this price range, allowing your bigger kid to stay in a harness longer. My 4 year old is almost 45 pounds, so this 65 pound forward facing limit will allow him to stay on a harness for a few more years, until he is ready for a belt positioning booster.
- Relatively compact size, with straight sides that make it easier to fit next to another seat.
- Comfortable, cool fabric. Won't absorb heat like a dark seat if you live somewhere hot.
- Plush seat!
- Machine washable cover.
- Cute styling! I got the aqua blue for both my son and daughter and they love it.
- Easy forward facing install.
- Lightweight and easy to carry for travel.
CONS:
- Difficult to get a tight installation rear facing.
- Does NOT fit 3 across in a Jetta.
- Tedious to rethread the straps and adjust the headrest.
- The button you have to push to loosen the straps is buried under the cover and not marked, so it isn't easy to find and use.
All in all, this is a great basic seat for the money!
I use them as travel seats and back ups in our second car. This seat won't work well for someone who needs to use it for different children, as it must be removed from the vehicle to adjust the headrest and strap heights. It also wouldn't be ideal if you were going to be moving it from one car to another frequently, as the install isn't as quick and easy as it is on models with more convenience features. But it's safe and sturdy and does its job, and you really can't beat it for this price!
- Reviewed in the United States on November 17, 2024Color: OnyxStyle: Car SeatVerified PurchaseI debated what car seat to get for my child once he outgrew his infant car seat and love this one. I thought it was easy to install and fits well in my car. We still have it rear facing so it does take up more room that way but my 6ft husband still fits comfortably in the front passenger seat with our little one behind him. Other people reported some type of chemical smell but ours didn’t have that. My little guy absolutely loves this car seat because it’s much roomier than his infant car seat. I would definitely buy again!
- Reviewed in the United States on April 22, 2024Color: OnyxStyle: Car SeatVerified PurchaseWe bought this specifically to use on the plane ride and while on vacation. For the plane it worked perfectly (for a 14 month old). It is super light to move around and narrow so it fits in the plane seat.
When we used it in a car, it wasn't great because it is a fairly low quality car seat, it sits weirdly on seats so when our son fell asleep his neck tipped over really far and it looked uncomfortable. We had to use a second item to prop the car seat backward and make it the correct angle in the car.
HIGHLY recommend for plane rides & travelling!!!!! Don't recommend for daily use in a car.
- Reviewed in the United States on December 13, 2024Color: OnyxStyle: Car SeatVerified PurchaseThis is extremely difficult to install rear facing in some vehicles (our truck and our SUV with bench seating)- we ended up getting different car seats because it was so frustrating. We had missed the return window and found that it is easier to install rear facing in bucket seats (grandmas suv) and very easy to install forward facing in any vehicle, and works great for that (when your child is big enough). It is slim yet very comfortable, and lightweight making it good for travel (I can’t imagine lugging our Britax car seats through the airport… this Cosco seat is much better for that). Because of how difficult it was to correctly install rear facing, I would not recommend this carseat UNLESS you are looking for something forward facing.
- Reviewed in the United States on June 29, 2024Color: OnyxStyle: Car SeatVerified PurchaseOrdered this to go into grandma’s car when my kids are with her. It’s super light weight. But definitely hard to secure into place. Doesn’t look very comfy, and there’s not like head rest. But at the same time, you’re getting what you pay for, so value for money, I think it’s great. It’s pretty small which is great for saving space or in smaller cars.
Top reviews from other countries
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CristinaReviewed in Mexico on September 16, 2023
5.0 out of 5 stars Me encanto
Color: OnyxStyle: Car SeatVerified PurchaseSencilla de instalar y de muy buena calidad
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Patricia P.Reviewed in Mexico on October 26, 2021
5.0 out of 5 stars La mejor silla.
Color: OnyxStyle: Car SeatVerified PurchaseFácil de instalar, fácil de asegurar al niño, excelente calidad
10/10
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AlmaReviewed in Mexico on December 13, 2018
4.0 out of 5 stars Me gustó
Color: OnyxStyle: Car SeatVerified PurchaseMe gusto el tamaño y lo facil de instalar. Y el color.
Realmente usa un espacio considerable para poder colocar mas sillas o si el auto es muy compacto.
Pero no creo que sea apta para un bebé menor de 6 meses al menos pues todavia tendria que adaptar unas sabanitas enrrolladas a los costados de mi bebé para que no quede muy flojo en el asiento.
AlmaMe gustó
Reviewed in Mexico on December 13, 2018
Realmente usa un espacio considerable para poder colocar mas sillas o si el auto es muy compacto.
Pero no creo que sea apta para un bebé menor de 6 meses al menos pues todavia tendria que adaptar unas sabanitas enrrolladas a los costados de mi bebé para que no quede muy flojo en el asiento.
Images in this review
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GabyReviewed in Mexico on April 19, 2020
5.0 out of 5 stars Buen tamaño y peso
Color: OnyxStyle: Car SeatVerified PurchaseEs ligera, la usamos no como silla de diario ni para trayectos largos. Se usa en auto de familiares.
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DulceReviewed in Mexico on August 28, 2020
5.0 out of 5 stars Cómprenlo
Color: OnyxStyle: Car SeatVerified PurchaseTodo perfecto, de las mejores compras que he hecho.