Truck Parts & Maintenance: Where Owner-Operators Find Parts, Shops and Roadside Help

Keeping a truck rolling is the biggest cost you control after fuel. ATRI's 2026 operational-cost report puts the industry's average repair and maintenance bill at $0.215 per mile in 2025, plus $0.050 per mile for tires, and found trucks ran only about 36,891 miles between breakdowns. Knowing where to get the right part fast, and which shop to trust, is part of the job.

This hub links only to official locators and company pages so you can search your own area. We don't list individual shops or addresses. For what the work costs, see how much semi truck maintenance costs in 2026.

1. OEM dealer networks (parts counters and service bays)

Every truck brand runs a dealer network with a parts counter, a service shop and a 24/7 support line. Dealers are the default for warranty work, engine and emissions repairs, software updates and recalls.

Tip: have your VIN ready when you call a dealer parts counter. Many engine and aftertreatment parts differ by build date, and the VIN pulls the exact build list.

2. National parts chains and buying groups (all makes)

All-makes distributors stock brakes, wheel-end, filters, air system, lighting, suspension and driveline parts for every brand, and many run their own service bays.

3. Online parts sellers

Good for planned repairs, chrome and accessories, and hard-to-find parts when you can wait for shipping.

Before you order online, check: exact part number (not just "fits Cascadia"), core charge and how to return the core, freight cost on heavy items, and the return window.

4. Repair shops and service on the road

Truck-stop chains run service bays along the interstates, which is often the fastest way to get a PM, tires or a light repair without leaving your route.

5. Roadside help and breakdown networks

Safety first: federal rules (49 CFR 392.22) require hazard lights and warning devices when you're stopped on the shoulder. Get the truck and yourself safe before you start calling.

6. Checklist: how to choose a truck repair shop

1. Can they work on your make and engine?Ask about your exact engine (for example Cummins X15, Detroit DD15, PACCAR MX-13, Volvo D13) and whether they have the dealer-level diagnostic software for it.
2. Get a written estimate firstAsk for parts and labor split out, the hourly labor rate, diagnostic fees, and a call before any extra work is added.
3. Ask about partsOEM, aftermarket or reman? Who pays the core charge? Can you bring your own parts?
4. Warranty on the workHow long are parts and labor covered, and is the warranty honored at other locations if it's a chain?
5. Check your truck's warrantyDon't let a non-authorized shop do work your OEM or extended warranty would cover without checking the terms.
6. Turnaround and parkingWhen can they start, how long will it take, and can you stay with the truck? Downtime often costs more than the repair.
7. Technician qualificationsAsk whether techs are ASE-certified, and for brake work, whether the inspector meets FMCSA's brake inspector rules (49 CFR 396.25).
8. Keep the paperworkFMCSA requires carriers to keep inspection, repair and maintenance records for each vehicle (49 CFR 396.3). Get an itemized invoice every time.

Keep reading

• How much does semi truck maintenance cost? (2026): cents per mile, PM, tires, brakes, DPF cleaning and engine overhaul examples, and a maintenance schedule.
• Cost to start a trucking company: the full startup budget, including how much cash to hold for repairs.