AST Suspension Subframe Bushing

AST Subframe Bushings: Heavy-Duty Replacement for a Smoother, More Controlled Ride

When subframe bushings wear out, the symptoms are hard to ignore: clunking over bumps, imprecise steering feel, and vibrations that seem to travel straight from the road into the cabin. The subframe is a critical structural component that houses the powertrain, drivetrain, and suspension — and the bushings that isolate it from the body are what stand between a composed, quiet ride and a chassis that feels loose and unpredictable. Suspension subframe bushings are small parts with an outsized impact on vehicle dynamics, making quality materials and precise fitment non-negotiable.

What Sets AST Subframe Bushings Apart

AST has built its reputation in the replacement parts segment by delivering components that meet or exceed OE specifications — and their subframe bushing lineup reflects that commitment. AST subframe bushings are constructed from polyurethane, a material chosen for its superior durability and resistance to compression set compared to standard rubber. Over time, factory rubber bushings deform and crack, robbing the suspension of its precision. Polyurethane holds its shape longer, maintaining consistent geometry and reducing noise, vibration, and harshness (NVH) for more miles.

AST subframe bushings also carry a Heavy Duty designation, signaling their suitability for vehicles that see demanding driving conditions — whether that's daily highway miles, spirited canyon runs, or vehicles used for towing and hauling. Their construction is engineered to absorb and dampen the forces the subframe experiences without transmitting unwanted harshness back into the chassis.

Vehicle Coverage and Fitment

AST offers subframe bushings for a range of popular platforms, with particularly strong coverage for Nissan models such as the Rogue and Sentra. Notably, AST provides solutions for applications where the OEM does not sell the bushing as a standalone part — meaning AST's bushings allow drivers to restore subframe isolation without the expense of replacing an entire subframe assembly. Parts like the PSB 341, PSB 345, and PSB 346 address forward and rearward subframe positions, ensuring a complete restoration of subframe mounting integrity. Each bushing is sold individually or in kits depending on the application, so you can replace just the failed component or refresh the entire set.

Backed by a Real Warranty

AST stands behind its subframe bushings with a 24-month or 24,000-mile warranty against defects in materials or workmanship, beginning from the date of delivery. That coverage reflects the confidence AST places in its manufacturing process — and gives drivers peace of mind that a critical suspension component is protected well beyond the installation date.

Whether you are restoring a worn daily driver or proactively refreshing the suspension on a higher-mileage vehicle, AST subframe bushings offer a durable, fitment-accurate solution. Browse the full Suspension Subframe Bushing category to find your application, or visit the AST brand page to explore the complete lineup of AST replacement parts.