Freightliner Truck Repair in Austin, TX
Cascadias running freight and M2s working local routes — the most common truck on the road, and a regular in our bays.
Freightliner service at an independent Austin shop
Freightliner is the truck most fleets around Austin actually run, from highway Cascadias to M2 box and service trucks. Detroit power and Freightliner electrical architecture both reward a shop that has seen them before, and we have.
Freightliner models and drivetrains we service
- Cascadia — Highway tractors with Detroit DD13 and DD15 power and full aftertreatment.
- M2 106 & business class — Box trucks, service bodies, and vocational units running local routes.
- Detroit DD13 / DD15 — Diagnostics, aftertreatment faults, EGR, turbo, and engine repair.
- Cummins-powered Freightliners — ISB, ISX, and X15 service in both highway and vocational trucks.
What we see fail on Freightliner
- Aftertreatment and derate faults — DPF loading, DEF dosing, and SCR efficiency codes that shut down a working truck.
- EGR and turbo problems — Soot-loading, sticking vanes, and coolers that leak into the intake.
- Electrical and multiplex faults — Intermittent lights, sensors, and modules chased with data rather than guesswork.
- Air system and brake wear — Leaks, dryers, and brake work that turns into a DOT violation if it is put off.
- Suspension and alignment — Air bags, bushings, and alignment on tractors and trailers alike.
Freightliner work we handle
- Detroit DD13/DD15 and Cummins diagnostics and repair
- Aftertreatment service — DPF cleaning, DEF systems, SCR faults
- Air brake service and air-system leak repair
- Electrical diagnostics and repair
- Heavy-duty alignment, suspension, and front-end work
- Annual DOT/FMCSA inspections and fleet preventive maintenance
Modern Diesel is an independent, Christian, veteran-owned shop — we service Freightliner trucks but are not a dealer or affiliated with the manufacturer. Warranty coverage on our work is set with your service advisor at the time of service.
Related services
Other makes we service
Peterbilt · Kenworth · Volvo · Mack · International · Isuzu · Hino
Bring it to the shop
We work on Freightliner at our shop at 2900 N FM 973, Austin, TX 78725, serving the Greater Austin Area (Travis, Bastrop, Williamson, Hays) — Austin, Del Valle, Manor, Elgin, Pflugerville, Round Rock, and the surrounding counties. Call 512-717-2777 and tell us what it's doing, or send us the details and we'll get back to you.
Common questions
Do you work on Detroit DD15 engines?
Yes — DD13 and DD15 diagnostics, aftertreatment and EGR work, turbo service, and engine repair. These engines throw codes that point downstream of the real fault, so we test before replacing anything expensive.
Can you service our whole Freightliner fleet?
Yes. Fleet accounts cover scheduled preventive maintenance, priority scheduling when a truck goes down, on-site service at your yard, and DOT inspections scheduled before they come due — with one point of contact who knows your trucks.
Do you service Freightliner Sprinter vans too?
Yes, though those are a different animal — Mercedes, Freightliner, and Dodge Sprinters share a platform and we service all three. See our Sprinter repair page for what that covers.
Ready when you are.
Drop by the shop at 2900 N FM 973, Austin, TX 78725 or call and we’ll get you scheduled.