Nuna Pipa RELX Infant Car Seat Base

Ships FreeShips Free
In Stock
This item ships to you directly from Nuna, please allow 2 weeks for delivery.

Your life now is focused on firsts—first words, first steps. Our innovative RELX base is one of the first to feature an adjustable stability leg to fit in center seating positions and a wider range of vehicles. It also features a steel-reinforced rigid latch adjusting across four positions for a better fit against your vehicle seat.

Colored indicators take the guesswork out of installation, and the bubble-free, numbered, on-the-go recline means you can change positions as your baby grows without having to uninstall the base. The lockoff with easy-access belt path makes it simple to install with the vehicle belt. The smooth platform won’t take a toll on your vehicle seats, and the low profile allows for easier loading of any Nuna PIPA series infant car seat.

Problems solved—all of them. What else is left? Ah, yes. Relax.

  • True lock™ installation makes set up swift, simple and above all – safe
  • 5 second install
  • Crumple zone within the stability leg absorbs impact and minimizes force transferred to baby
  • Colored installation indicators confirm correct connections to the vehicle.
  • 4 positions on-the-fly recline
  • Bubble free recline angle guides clearly confirm the perfect riding angle
  • Low profile base for easier loading of infant seat
  • Open belt bath for easier install
  • Belt guides
  • Anti rebound panel
  • Automatic rigid latch storage
  • Extra convenient load leg storage with lock
  • Steel reinforced true lock™ rigid latch
  • 4 position adjustable rigid latch to remove or reduce the gap between vehicle seat and base
  • Locking 3 piece steel stability leg has a wide range of adjustment to fit most vehicles including middle seats
  • Seat belt lock off with separate lap and belt paths
  • Indicators on rigid latch turn green when clicked to vehicle anchor points
  • Indicators on stability leg turn green when in proper contact with vehicle floor
  • Steel stability leg helps minimize forward rotation during impact up to 90% (when compared to a system that is not using a stability leg)
  • Product weight: 18.6 lbs
  • Dimensions (in): 12 H x 23.75 L x 13 W
Product Reviews
out of 5.0
36 Reviews
Ratings Snapshot
of Reviewers
Papillion, Nebraska
Verified Buyer
Easy to install.
March 25, 2024
Easy to install with seatbelt once you figure it out. We moved this in and out of cars frequently for grandparents or babysitters. Glad to have an extra for that same reason. The stabilizer leg would rattle, but that just indicates it was time to tighten up the install.
Verified Buyer
Rigid latch makes a super easy install
March 19, 2024
Definitely worth the extra money to upgrade to the RELX base. The base is extremely easy to install with the rigid latch connectors. If you need to install with the seat belt, you really have to push it down into the seat to get a tight enough install. I was not strong enough.
Verified Buyer
Easy to install
February 29, 2024
Extremely easy to install. This base is extremely narrow so it makes it possible for me to do three across in my car.
Kansas City
Verified Buyer
Love Nuna Base
February 28, 2024
We love our Nuna Pipa base and car seat. They feel so secure in the car. I really love all the features and it’s so simple and easy to use and install. We have a base in my husbands car and my car.
Customer Images
San Jose, Ca
Verified Buyer
Nuna Pipa RELX base only
November 26, 2023
Needed an extra base so not have to remove each time when changing vehicles. The base is very easy to install once you know how to extend the part that hooks on to your car seat.
  • easy to install and remove.
  • Instructions not very clear on how to extend NUNA base to fit different cars.
Tupelo, MS
Verified Buyer
Great product
October 23, 2023
Works perfectly
Amesbury, Massachusetts
Verified Buyer
Worth it
October 6, 2023
We needed a second base for our car seat and this was worth the money. It’s super secure and way better than fiddling with a seatbelt install when you need to switch vehicles.
Verified Buyer
Nuna wins again
August 2, 2023
We love Nuna! We needed an extra base for our Nuna Pipa Lite Rx and this is perfect and was convenient to find and purchase. I love the stability leg for extra protection. Very quick and easy to install. Highly recommend.
Brooklyn, New York
Verified Buyer
Great base for the Nuna carseat
June 26, 2023
This is exactly as expected and has served us well. It's quite heavy but only meant to be carried to the car for installation. Nuna quality is great and makes us feel secure!
Boston, MA
Verified Buyer
May 31, 2023
So easy to click into place. Worth every extra penny for this!
  • Easily clicks into place
  • Somewhat heavy, but if you are not constantly moving it
Verified Buyer
Another great product
May 26, 2023
Everyone loves this seat base. It makes installing the car seat so easy. It literally takes less than 5 seconds to put the seat in the car and you know it’s installed correctly. Would definitely recommend!
  • Easy to install
  • None
West Virginia
Verified Buyer
Solid car seat base
May 20, 2023
Love the Relx base over the standard pipa base. The recline features are nice and love that we can just buy an extra base as we have more than one car. Latch install was easy!
MIddletown, NJ
Verified Buyer
Love it
April 1, 2023
Awesome Product
  • best on the market
Heartland, Texas
Verified Buyer
fast shipping
February 28, 2023
fast shipping! Just a described
  • anti rebound bar
Pittsburgh, Pennsylvania
Verified Buyer
Feeling of safety!
January 13, 2023
Very fast shipping and delivery! This base is exactly what we needed given we have two cars. All of the features make us feel much safer about transporting our baby.
Hydro, Oklahoma
Verified Buyer
Easy install
November 8, 2022
So easy to install!
Denver, North Carolina
Verified Buyer
Safe and easy to use
November 6, 2022
Great car seat and base. Safe and secure. Would recommend!
  • East to install, secure
  • None
Nantucket, MA
Verified Buyer
so far so good
November 2, 2022
fast easy shipping. exactly what I needed for my husbands car! cannot wait to use
Ballwin, MO
Verified Buyer
2 Car Seat Bases are a MUST!
September 19, 2022
Purchased an extra base to keep in my husband's car and it is 100% worth it!! Definitely a must if you plan to move your carseat from car to car
Portland, OR
Verified Buyer
Expensive but happy with the purchase
September 10, 2022
We feel that the base is a little overpriced, but we've very glad to have a base in our second vehicle. Easy to install and really secure for baby!
Lubbock, TX
Verified Buyer
September 6, 2022
This one of the best car seat bases on the market. Its very easy to install and is very sturdy. You can't go wrong with this product offered by NUNA!
Seattle, Wa
Verified Buyer
Great car seat base
August 16, 2022
Easy to install and works well in both of our cars. Car seat clicks in well and we're happy with how its functioning.
Verified Buyer
Easy to install Nuna Car Seat Base
April 15, 2022
Easy to install. Seat snaps into base easily. Works great.
Verified Buyer
Excellent Car Seat Base
March 19, 2022
We got the pipa LX lite car seat and the base that came with it is much bulkier than this one, and does not feel nearly as secure. This one holds the car seat in approximately the same position, but is much narrower than the stock base. This is great if you have boosters next to the car seat, but if you're trying to get a little more room in the for the driver - no luck here. I really do appreciate the solid installation and robust seatbelt restraint options.
Cincinnati, Ohio
Verified Buyer
Perfect base
February 2, 2022
So easy to use and compatible with our car seat
Verified Buyer
The Best Base for NUNA
July 7, 2021
I have an additional base that came with my NUNA Pipa but this one fits closer to the seat and has adjustments for weight. The fact that it sits up against the seat allows the passenger side front seat to recline more without touching the carseat.
Verified Buyer
Great Car Seat Base
May 11, 2021
This base was very easy to install and made us feel that our baby was even safer with the stability leg. Having the base made moving the seat between cars very easy. Would 100% recommend to a friend.
Haley R.
Verified Buyer
Love the reward point system!
April 21, 2021
Fast shipping!
Verified Buyer
April 14, 2021
This base is amazing and super easy to install and get the perfect fit.
North Carolina
Verified Buyer
January 25, 2021
I love that we have the option to get a second base for our NUNA carseat to have in both my husband's car and mine!
Grapevine, Texas
Verified Buyer
January 15, 2021
This is exactly what we needed to use the carseat in our Tesla model X.
Gainesville, Florida
Verified Buyer
Perfect upgrade!
October 30, 2020
We got the Nuna pipa lite lx and purchased the relx base as our second base. This new base design fixed just about every thing on my “I wish it had” list for the original Nuna pipa series base. Love that The install of this base is so quick and easy, the multiple recline positions, the new rebound plate, the wider variety of load leg positions! I can’t recommend this new base design over the original enough! Definitely worth the extra money!
  • Easy instal, Amazing new upgrades, sturdy!
Avon Lake, Ohio
Verified Buyer
August 26, 2020
We purchased the Nuna Pipa RX with the Relix base and loved it. It has a very sleek innovative design that is easy to use and install. It is heavy compared to other bases, but that made us feel as if it was extra secure. We knew we would want one in each car and we feel that our daughter is as safe as can be with this base.
  • Sturdy, East to install
  • None
San Diego, California
Verified Buyer
Perfect for Nuna Pipa Lite Lx
July 26, 2020
We needed a second base for our Nuna pipa lite lx. This is perfect because it's an upgrade in comparison to the pipa series base.
Ashley P.
Cypress, Texas
Verified Buyer
Fast Shipping!
May 26, 2020
We needed a second base for our Nuna car seat. Everywhere we looked shipping was taking up to a month or more since it was during the Covid Pandemic. Albee Baby shipped them item out NEXT day and we received it within a week of ordering.
Verified Buyer
Easy installation and indicators easier to see
May 9, 2020
We bought this car seat base as a second base for our family. We bought the Nuna Pipa Lite LX car seat, which came with the previous-model base. We bought these items for our first baby, so we don't have experience with other bases. Also, we haven't been able to use it yet, because our baby hasn't been born yet. But I love that the RELX makes installation so easy. I also read that Nuna moved the indicators so they're easier to see -- from the front of the load leg to the sides. Looking forward to using this!
  • Easy installation
  • Indicators easier to see
  • n/a
Customer Q&A