Bosal 283-749 Exhaust Muffler Assembly - Rear

Bosal BRExhaust Direct-Fit Muffler Assembly

The Bosal BRExhaust Direct-Fit Exhaust Muffler Assembly is built for OE-style exhaust performance and a factory-like sound profile. This direct-fit rear muffler assembly is made for the 2004-2006 Mazda 3 rear silencer application and uses a bolt-on configuration for straightforward replacement service.

Part number 283-749 is constructed from aluminized steel with 16-gauge steel tubing and a fully aluminized finish for added corrosion resistance. The round muffler body, sleeved inlet, and tip outlet are engineered to maintain low backpressure while helping reduce exhaust noise.

Key Features

• Direct-fit exhaust muffler assembly for the rear position
• Fits 2004-2006 Mazda 3, rear
• OE-style sound and performance characteristics
• Aluminized steel construction with aluminized finish
• 16-gauge steel tubing for durable exhaust service
• Round muffler body with sleeved inlet and tip outlet
• Designed for low backpressure and noise reduction
• Part number 283-749

Product Details

As part of the Bosal BRExhaust Direct-Fit Exhaust series, this muffler assembly is built to match factory-style fitment and exhaust tone without requiring modifications. The 76-inch overall length, 6-inch body height, 6-inch body width, and 15.75-inch body length reflect a direct replacement layout for the rear silencer position on the Mazda 3. If you are replacing a worn rear muffler on a 2004-2006 Mazda 3, part number 283-749 provides a direct-fit solution with an OE-style configuration.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Excessive exhaust noise from a worn rear muffler
• Rust or corrosion on the original muffler assembly
• Factory exhaust tone that has become louder or uneven
• Backpressure changes caused by a deteriorated muffler core
• Fitment issues from non-direct replacement exhaust parts

Installation Notes

Compatible With 2004-2006 Mazda 3 rear silencer applications. The direct-fit design is intended for bolt-on installation with no modifications required, but exhaust hangers, clamps, and related service parts should be inspected during replacement. Verify inlet diameter, outlet style, and rear-position fitment before installation. Part number 283-749 is a rear muffler assembly, so confirm the vehicle’s exhaust routing matches the listed application.

Quality Assurance

Bosal is a long-standing OE supplier, and the BRExhaust line focuses on factory-style replacement exhaust components with consistent fit and sound characteristics. This muffler assembly is built from aluminized materials to support corrosion protection and dependable service in the rear exhaust position.