Change Car Rear Silencer Ford Mustang

Change Car Rear Silencer

Easy 1h30–2h00 ~150–200$
Time Estimate 1h30–2h00
Cost Estimate ~150–200$
Difficulty Easy
Vehicles
Mustang 2004-2014 2
  • 4.6 Gas (C46USEM)
  • 4.6 Gas (C46USEM)
Mustang VI 2015-2025 7
  • 2.3 (EcoBoost) Gas (C23HD0D (99H))
  • 2.3 (EcoBoost) Performance Gas (C23HD0D (99D))
  • 3.7 V6 Ti-VCT Gas (C37PDED (99M))
  • 5.0 V8 GT Gas (MF8F (99F))
  • 5.0 V8 GT Gas (MF8F (99F))
  • 5.2 V8 Shelby GT350 Gas (C52SDSX (99Z))
  • 5.2 V8 Shelby GT500 Gas (99J)
Repair the silencer* 1h30
Repair the front silencer* 1h30
Align the front silencer* 0h30
Repair the main silencer* 0h30–1h30
Align the main silencer* 0h30–0h30
Difficult main silencer removal* 0h30
Repair the rear silencer* 0h30–1h30
Weld a sheet-metal repair panel onto the rear silencer* 0h30–0h45
Difficult rear silencer removal* 0h30
Remove/refit the silencer 2h00
Renew the silencer 2h00
Remove/refit the front silencer 1h30
Renew the front silencer 1h30
Repair the main silencer 0h30
Repair the rear silencer 0h30
Remove/refit the front silencer Coupe 2h00
Renew the front silencer Coupe 2h00
Remove/refit the rear left silencer Coupe 1h00
Renew the rear left silencer Coupe 1h00
Remove/refit the rear right silencer Coupe 1h00
Renew the rear right silencer Coupe 1h00
Remove/refit both rear silencers Coupe 1h30
Renew both rear silencers Coupe 1h30

What is a Ford Mustang rear silencer?

The rear silencer (also called the back box or rear muffler) reduces exhaust noise to an acceptable level. It is located at the end of the exhaust line, after the catalytic converter, particulate filter (if fitted), and sometimes an intermediate silencer.

When should you change the Ford Mustang rear silencer?

No periodic replacement interval is specified. Carry out regular visual inspections for corrosion, holes, and deteriorated mounting rubbers. Signs that replacement is needed: louder exhaust noise, rattling from loose baffles, visible rust holes, exhaust fumes entering the cabin, or failure at the MOT/roadworthiness test.

Is it difficult to change the Ford Mustang rear silencer?

Difficulty level 2/5: technically easy but may require effort if bolts and clamps are rusted. Key steps: raise the vehicle, apply penetrating oil to clamp bolts, remove the clamp connecting the silencer to the intermediate pipe, remove the mounting rubber hangers, fit the new silencer with new gasket/clamp, reattach mounting rubbers, check for leaks with engine running.

Related products →
Maintenance plans for your Mustang →

5 generations covered

Generation Years Vehicles Fuel
Mustang 1965-1973 1965-1973 5.0 Gas (302F), 5.0 Gas (302F), 5.0 Gas (302F), 5.0 Gas (302F), 5.8 Gas (98G), 5.8 Gas (98G), 5.8 Gas (98G), 5.8 Gas (98G), 5.8 Gas (98G), 6.4 Gas (FE390), 7.0 Gas (FE428), 7.0 Gas (FE429) Gas
Mustang 1978-1993 1978-1993 2.3 Gas (99B), 2.3 Gas (99B), 5.0 Gas (99DSFI), 5.0 Gas (99E), 5.0 Gas (99E) Gas
Mustang 1994-2004 1994-2004 3.8 Gas (994), 3.9 Gas (C39VVEX), 4.6 16V Gas (99W), 4.6 16V Gas (99W), 4.6 16V Gas (99W), 4.6 32V Cobra Gas (99V), 4.6 32V Gas (99V), 4.6 32V Gas (99V), 4.6 Gas (999), 5.0 Gas (99D), 5.0 Gas (99T), 5.4 Cobra R Gas (H), 5.7 Cobra R Gas (C) Gas
Mustang 2004-2014 2004-2014 3.7 V6 Ti-VCT (Duratec) Gas (C37PDED (99M)), 4.0 Gas (C40VSEX (99N)), 4.6 Gas (C46USEM), 4.6 Gas (C46USEM), 5.0 32V Ti-VCT Gas (C50SDEM (99F)), 5.0 32V Ti-VCT Gas (C50SDEM (99F)), 5.4 32V S/C Gas (C54SDSM), 5.4 32V S/C Gas (C54SDSM), 5.4 32V S/C Gas (C54SDSM), 5.8 S/C Gas (99Z) Gas
Mustang VI 2015-2025 2015-2025 2.3 (EcoBoost) Gas (C23HD0D (99H)), 2.3 (EcoBoost) Performance Gas (C23HD0D (99D)), 3.7 V6 Ti-VCT Gas (C37PDED (99M)), 5.0 V8 Bullitt/Mach 1 Gas (990), 5.0 V8 GT Gas (MF8F (99F)), 5.0 V8 GT Gas (MF8F (99F)), 5.2 V8 Shelby GT350 Gas (C52SDSX (99Z)), 5.2 V8 Shelby GT500 Gas (99J) Gas

Other repair guides

Change Car Accessory Belt Kit

Easy 0h45

Change Car Air Filter

Very easy 0h30–0h30

Change Car Battery

Very easy 0h30

Change Car Cabin Filter

Very easy 0h30

Change Car Clutch

Technical 6h00–7h00

Change Car Front Brake Discs and Pads

Easy 1h30

Change Car Front Brake Pads

Easy 1h30

Change Car Handbrake Cable

Very easy 0h30

Change Car Oil Filter

Easy 1h30

Change Car Shock Absorbers

Easy 3h00

Change Car Spark Plugs

Easy 1h30

Change Car Turbo

Very technical 6h00

Change Car Water Pump

Easy 2h00
Check the maintenance log for your vehicle →