2010-2017 Toyota Prius - "Coil-Rite" Air Bag Helper Springs (Rear)

Firestone Toyota Prius Coil-Rite Air Bags 2010-2017 4136
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Firestone 4136
Firestone - 4136-prius-air-bag-springs
Authorized Dealer
Our Price
  • $104.65
Save $10.47 more with Code: 10EXTRA - details
Usually Ships within 24 to 48 Hours (excluding Saturday and Sunday)
Arrives 1 to 5 days after product ships


Firestone "Coil-Rite" air bag helper springs are designed to fit inside the existing coil spring suspension creating a variable rate spring. These air bags are made of durable, elastic polyurethane providing years of comfort and stability to your vehicle. "Coil-Rite" air bags enable adjustment for varying loads and road conditions by inflating or deflating the springs. Performance can be altered as easily as inflating a tire. Installed between the frame of the vehicle and the suspension providing load support through the use of air pressure.

Features and Benefits

  • Firestone # 4136 Air Bags are custom fit for the Toyota Prius
  • Easy installation (1 to 2 hours)
  • Includes (2) air bag helper springs and any required hardware
  • Will handle loads capacities up to 500-1000 lbs*
  • Reduce suspension fatigue
  • Improve steering and balance
  • Increase vehicle stability
  • Prevent "bottom" out
  • Firestone Limited Lifetime Warranty

Installation Notes

1. Do NOT exceed the vehicles Recommended Gross Vehicle Weight Rating (GVWR)

Tech Specs

Download Instructions: 4136 Instructions
Level Load Capacity: 500 lbs to 1000 lbs
Average Install Time: 1 to 2 hours
Front or Rear Axle: REAR
Drilling Required (Yes or No): NO
Weight: 10.00 lbs.
Part 4136 fits:
  • 2017 Toyota Prius
  • 2016 Toyota Prius
  • 2015 Toyota Prius
  • 2014 Toyota Prius
  • 2013 Toyota Prius
  • 2012 Toyota Prius
  • 2011 Toyota Prius
  • 2010 Toyota Prius

Customer Questions & Answers

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  • 4.0 out of 2 Overall
  • 100% reviews recommend this product
Review Product
Possibly a good set up
This is my 3rd vehicle with auxilary air bags. First two were awesome but for some reason they changed the valve design. I installed this on my 2012 Prius v model 3 and they lasted 3 days before the valve was faulty. I bought the bags for an 8k trip and had leave. Customer service was fine but they were an able to replace before I had to leave. I can not yet attest to the durability of the “new and improved” faulty design.
Recommend this Product: YES
2012 Prius v model 3
– Value
– Quality
– Installation
2010-2013 Toyota Prius - "Coil-Rite" Air Bag Helper Springs (Rear)
Getting Prius jacked up and secured with jack stands was hard due to lack of places to put jacks & jack stands. Finally borrowed 2nd jack from other Prius owner & jack up with 2 jacks. Took 25-30 minutes to get bag into passenger side due to muffler. Driver side bag only took about 15 minutes to get in place. Didn't have to take off wheels. Put valve on top. Routed both airlines to "T" & single airline thru wiring gasket on passenger side, around rear battery, & out vent behind passenger side taillight assembly. Left 8-10 inch 'pig tail' with valve loose so can fill airbags when loaded. Works GREAT.
Recommend this Product: YES
2013 Prius v station wagon
– Value
– Quality
– Installation