Timbren TORSEN04 Rear Suspension Enhancement System for 2004-2016 Toyota Sienna

Vehicle Fitment

2004-2016 Toyota Sienna (All Models)
FWD and AWD Applications

Fitment Notes

• Rear suspension application - mounts between frame and rear axle
• Works with factory suspension - no modifications to OE components
• FWD models: straightforward bolt-on installation
• AWD models: installation requires more extensive access to mounting points
• Proper installation should leave ¬Ω" to 1¬Ω" gap between spring and frame when unloaded
• Does NOT increase GVWR - do not exceed manufacturer weight ratings

Features

• Patented Aeon hollow rubber spring technology
• Progressive spring rate - stiffens automatically as load increases
• Eliminates rear-end sag under heavy loads
• Reduces trailer sway and body roll
• Improves roll stability when hauling cargo or passengers
• Cushions road shocks for smoother ride quality
• Each spring functions independently for uneven load compensation
• Comfortable ride when unloaded - springs engage only under load
• Bolt-on installation - no drilling required
• Zero maintenance - no air lines, fittings, or compressors
• All-weather performance - operates in extreme heat and cold
• Laser-cut steel brackets with powder coat finish
• ISO9001 certified manufacturing

Specifications

• Brand: Timbren
• Part Number: TORSEN04
• UPC: 809933003481
• Product Line: SES (Suspension Enhancement System)
• Position: Rear
• Spring Type: Aeon Hollow Rubber
• Rated Capacity: 2,400 lbs (per pair)
• Kit Weight: 6.0 lbs
• Bracket Finish: Black Powder Coat
• Installation: Bolt-On (No Drilling)
• Maintenance: None Required
• Country of Origin: Canada
• Warranty: Lifetime

Included Components

• (2) Timbren Aeon SES hollow rubber springs
• (2) Heavy-duty powder-coated steel mounting brackets
• All necessary mounting hardware
• Installation instructions

Product Description

The Timbren TORSEN04 Suspension Enhancement System eliminates rear-end sag and improves load handling for 2004-2016 Toyota Sienna minivans. Designed for families who frequently haul passengers, cargo, or tow trailers, this bolt-on system uses Timbren's patented Aeon hollow rubber springs to provide progressive load support that automatically adjusts to varying weights. As cargo load increases, the rubber springs compress and push back harder, keeping the vehicle level and eliminating the dangerous squat that compromises handling and headlight aim. The system mounts between the frame and rear axle, working in conjunction with the factory suspension rather than replacing it. Each spring operates independently to compensate for uneven weight distribution from side to side. Unlike air bag systems that require compressors, air lines, and regular pressure checks, the Timbren SES requires zero post-installation maintenance - simply bolt it on and enjoy improved stability for the life of the vehicle. When unloaded, the springs maintain a small gap from the frame so ride quality remains comfortable for everyday driving. The laser-cut steel brackets feature a durable powder coat finish for long-term corrosion resistance. Ideal for hauling heavy cargo, full passenger loads, or light trailer towing. Backed by Timbren's lifetime warranty and 100-day money-back guarantee.