Rear Suspension Enhancement Options for a 2021 Mazda CX-5 Towing an Aliner Scout Lite
Updated 11/09/2026 | Published 11/06/2026
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Question:
Im towing a 2026 Aliner Scout Lite camper with a 2021 Mazda CX5. The camper is towing level, tongue weight is good and I got the ball rise just right. The issue Im having is the rear suspension is sagging about 2inch which is more than what I anticipated. Im looking for a REARinch suspension modification thatll take out this sag so that my car is also riding level. I looked at this part but its for the frontinch axle, not the rear. Is there a similar part that is designed for the REARinch axle of my car thatll eliminate the sag? Thank you Joe
asked by: Joe C
Expert Reply:
Hello Joe,
Welcome back.
Your 2021 Mazda CX-5 has an independent rear suspension with coil springs. Unfortunately, we don't have a confirmed rear suspension enhancement kit for your Mazda, but that doesn't mean we can't find something that works! The coil helper springs can work both in the front and the rear.
Since you have rear coil springs, we can look at Coil SumoSprings, which fit between the coils to provide additional support and help reduce sag when towing.
You'll want to park your Mazda on level ground, without the camper attached, and measure the open space between the coils near the middle of your rear springs (I attached an image for reference as well) . Here are a few options based on those measurements:
- # CSS-1094R: Coil gaps of 11/16" to 7/8"
- # CSS-1125R: Coil gaps of 15/16" to 1-3/16"
- # CSS-1145R: Coil gaps of 1-1/4" to 1-3/8" *** I have found on a different site that this one has worked in the rear.
Keep in mind that these won't increase your Mazda's towing capacity, and I can't promise they'll eliminate the full 2 inches of sag, but they may help get your vehicle riding closer to level.
I am also going to send you a private email with another suggestion as well.
Is this becoming more work than you imagined when you got the camper? It will all be so worth it!!!
(click to enlarge)
Product Page this Question was Asked From
Coil SumoSprings Custom Helper Springs for Coil Spring Suspension - Front Axle
- Vehicle Suspension
- Towing/Load Leveling
- Coil Spring Helpers
- Suspension Only
- Standard Duty
- Front Axle Suspension Enhancement
- SuperSprings Intl
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