About Us

American Muffler & Auto Repair is a family-owned, ASE and ASA certified auto repair shop providing full-service auto repair in Caldwell, Idaho.

Call (208) 402-4817Book Now
local auto repair team at auto repair shop
auto repair shop garage bays and muffler repair facility

Locally Owned

Family-owned auto repair in Caldwell since 2021.

★★★★★

300+ reviews

family owned local auto repair with kids at classic mustang

About American Muffler & Auto Repair

American Muffler & Auto Repair in Caldwell offers reliable full-service auto repair, including diagnostics, A/C, suspension, brakes, engine work, and maintenance.

We also handle custom exhaust, muffler repair, catalytic converters, and Intoxalock services, serving Caldwell and the Treasure Valley.

Owner Owen Mahaffey built the shop on honest diagnostics and certified workmanship, backed by a 24-month / 24,000-mile nationwide warranty with roadside assistance.

Call (208) 402-4817Book Now

Complete Auto Repair Services for Caldwell Drivers

From diagnostics and engine repair to brakes, A/C service, suspension, maintenance, and custom exhaust, American Muffler & Auto Repair keeps Caldwell drivers safely on the road.

Call (208) 402-4817Book Now

Why Drivers Choose American Muffler & Auto Repair

ase certified auto repair team with classic and modern vehicles

Vision

Every driver deserves an auto repair shop that diagnoses honestly, explains clearly, and repairs vehicles right the first time.

Mission

Deliver full-service auto repair in Caldwell, ID with certified expertise, custom exhaust capability, diagnostics, A/C service, brakes, suspension, engine work, and fleet repair for drivers across the Treasure Valley.

  • Family Owned & Operated

    Led by Owen Mahaffey, our Caldwell shop has served local drivers since 2021.

  • ASE & ASA Certified

    Our ASE, ASA, and RepairPal certified team delivers expert diagnostics, maintenance, repairs, and custom exhaust work.

  • Diagnostics First

    We perform thorough diagnostics and labscoping first, so you get clear answers without guesswork.

  • Treasure Valley Focus

    Based on Lake Avenue in Caldwell, we serve drivers across Canyon County, Ada County, and the Treasure Valley.

Book Auto Repair in Caldwell, ID

Reach out for diagnostics, engine repair, maintenance, and more from a trusted Caldwell auto repair shop.

Call (208) 402-4817Book Now

Featured Review

Aleena Wieland

Aleena Wieland

★★★★★

Amazing shop! They went out of their way to make sure my car was done early for my own personal scheduling needs! After many bad experiences with mechanics.. these guys know what they are doing! 10/10

Get Back on the Road With Confidence

auto repair team inside shop american muffler