Reviewed by Andrew, 4WD Suspension fitment team
Airbag Man coil-insert air helper kit for the rear coils of the Holden Colorado 7 / Trailblazer. Choose the standard kit (CR5123) for towing and touring loads, or the high pressure kit (CR5123HP) with internal bump stop for heavy constant loads.
Match your vehicle and its current rear ride height to the part number. HP (high pressure) versions carry the same fitment but run up to 60 psi for constant heavy loads or regular towing.
| Part number | Ride height | Pressure range | Suits |
|---|---|---|---|
| CR5123 | Standard Height | 5 psi - 30 psi | Colorado 7 RG 13-16; MU-X 4x2 & 4x4 UCS40 21-26; Trailblazer RG Jul.16-20 |
| CR5123HP | Standard Height | 5 psi - 60 psi | Colorado 7 RG 13-16; MG U9 Ute 25-26; MU-X 4x2 & 4x4 UCS40 21-26; Trailblazer RG Jul.16-20 |
The air springs sit inside the existing rear coils, so the factory springs stay in place. Air lines run to two inflation valves, usually mounted at the rear bar, so each side adjusts on its own. Run 5 psi unloaded and add pressure to bring the vehicle back to level when towing or loaded, up to 30 psi on the standard kit or 60 psi on the HP kit. Airbag Man notes that drilling is required for this fitment. Typical fitting time is 120 minutes.
Fitment data from Airbag Man for every part number in this listing.
| Make | Model | Chassis / years | Ride height | Part |
|---|---|---|---|---|
| Holden | Colorado 7 | RG 13-16 | Standard Height | CR5123 |
| Holden | Trailblazer | RG Jul.16-20 | Standard Height | CR5123 |
| Isuzu | MU-X | 4x2 & 4x4 UCS40 21-26 | Standard Height | CR5123 |
| MG | MG U9 | Ute 25-26 | Standard Height | CR5123HP |
Last updated: 9 September 2026
| Specification | Detail |
|---|---|
| Kit type | In-coil air helper kit (fits inside the existing rear coil springs) |
| Position | Rear axle |
| Part CR5123 | 5 psi - 30 psi |
| Part CR5123HP | 5 psi - 60 psi |
| Typical fitting time | 120 minutes |
| Fitting notes (Airbag Man) | Drilling Required |
| Kit contents | 2 x Airbag Man in-coil air helper springs, mounting hardware, air line tubing, fittings, 2 x inflation valves and step-by-step fitting instructions. HP kits add high-pressure sleeves and end protectors. |
| Warranty | Airbag limited lifetime manufacturer's warranty on the air springs |
Figures from Airbag Man product data. Helper kits assist the springs and do not change the vehicle's GVM or towing capacity.
It fits: Holden Colorado 7 RG 13-16 (Standard Height); Holden Trailblazer RG Jul.16-20 (Standard Height); Isuzu MU-X 4x2 & 4x4 UCS40 21-26 (Standard Height); MG MG U9 Ute 25-26 (Standard Height). Check the fitment table above for the full list, or send us your rego and we will confirm the exact part.
None at rest. This is a helper kit, not a lift kit. It stops the rear sagging under load: add air to restore factory ride height when towing or loaded, then drop the pressure for unloaded driving.
2 x Airbag Man in-coil air helper springs, mounting hardware, air line tubing, fittings, 2 x inflation valves and step-by-step fitting instructions. HP kits add high-pressure sleeves and end protectors.
The standard kit runs 5 psi - 30 psi. The HP kit adds a high-pressure sleeve over the air spring and runs 5 psi - 60 psi, for constant heavy loads or regular towing near the vehicle's limits. Both carry the same fitment and the same lifetime air spring warranty.
No. The kit includes inflation valves, so you can set pressure at a servo or with a portable 12V compressor. An onboard air control kit only adds in-cab adjustment.
No. The kit supports the suspension under load but does not raise GVM or towing capacity, and the vehicle must stay within the manufacturer's ratings. It is a bolt-in accessory.
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