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Commercial Truck Components

Truck Component Catalog

44 major components across brakes, aftertreatment, and suspension — supplier-by-supplier coverage.

44 components
Components
44
Categories
7
Suppliers
10
Coverage
Class 5-8
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What this means

Beyond engines, transmissions, and axles, commercial trucks rely on dozens of major component systems — each with their own suppliers, generations, problems, and maintenance schedules. We've catalogued 44 key commercial-truck components covering <strong>Brakes</strong> (Bendix, Haldex, WABCO ABS + ADB + drum + collision mitigation), <strong>Aftertreatment</strong> (Cummins, Detroit, PACCAR, Volvo/Mack, International emissions systems), <strong>Suspension</strong> (Hendrickson air ride + competitors), <strong>Telematics</strong> (Samsara, Motive, Geotab, Lytx, Verizon Connect, Omnitracs, Trimble, Platform Science), <strong>Tires</strong> (Michelin, Bridgestone, Continental, Goodyear, Cooper, Yokohama, BFGoodrich, Double Coin), <strong>Reefer Units</strong> (Carrier Vector, Thermo King Precedent, Mitsubishi TU), and <strong>APUs</strong> (Thermo King TriPac, Carrier ComfortPro, Idle Free, Espar, RigMaster, OEM electric). Each component page covers design, generations, reliability, common DTC codes, and maintenance schedule.

Browse by category
🛞
Tires (steer, drive, trailer, all-position)
12 components catalogued
→📡
Telematics / ELD / fleet management
9 components catalogued
→🔌
APUs — Auxiliary Power Units
6 components catalogued
→🛑
Brakes (ABS, ADB, drum, collision mitigation)
6 components catalogued
→❄
Reefer Units (TRUs — Carrier Vector, Thermo King Precedent)
5 components catalogued
→🌫
Aftertreatment / Emissions (DPF, DEF, SCR)
5 components catalogued
→🔧
Suspension (air ride, leaf, vocational)
1 components catalogued
→
Top component suppliers
Bendix Commercial Vehicle Systems4
Michelin4
Thermo King (Trane Technologies)3
Carrier Transicold3
Bridgestone2
BFGoodrich (Michelin Group)1
Mitsubishi Heavy Industries1
Idle Free Systems1
Volvo Group1
Goodyear1
Reefer Units — 5 components
Carrier Supra S8 (electric standby + diesel)
Carrier Transicold · Reefer Units
→
Carrier Vector 8500 / 8600 (reefer trailer unit)
Carrier Transicold · Reefer Units
→
Mitsubishi TU-100 (truck-mounted reefer unit)
Mitsubishi Heavy Industries · Reefer Units
→
Thermo King C-600 (compact reefer trailer unit)
Thermo King (Trane Technologies) · Reefer Units
→
Thermo King Precedent S-700 (reefer trailer unit)
Thermo King (Trane Technologies) · Reefer Units
→

Related

Frequently Asked Questions

What component categories are covered?
Currently: Brakes (ABS/ESC controllers, air-disc + drum foundation brakes, collision mitigation systems), Aftertreatment (DPF + DEF + SCR systems by OEM), and Suspension (air-ride systems). Coming: Telematics/ELD (Samsara, Motive, Geotab, Lytx), Tires (Michelin, Bridgestone, Continental, Goodyear), Cooling, HVAC. Each component category gets a dedicated sub-hub with editorial overview, supplier comparison, and per-component detail pages.
Why is brake CSA scoring so important?
Brake violations are the most-cited category in FMCSA roadside inspections — about 30-40% of all Vehicle Maintenance BASIC citations. Common brake violations (393.45 brake hose chafing, 393.47 brake lining defect, 393.48 brake adjustment) carry 4-8 severity weights and many are out-of-service eligible. Fleet brake PM directly drives CSA scores — managing this BASIC starts at the brake bay.
Can I tamper with the DPF or DEF system?
No. DPF/DEF tampering is a federal violation of the Clean Air Act (42 USC 7522) with EPA fines up to $5,000 per violation. CARB in California has zero tolerance. State enforcement varies. Many owner-operators in oil-field service delete DPF anyway, accepting the risk. Insurance carriers may deny coverage on deleted trucks. **For on-road operation, do not delete emissions equipment.**
Which brake supplier is best for my fleet?
Both Bendix and Haldex/WABCO/ZF are excellent. Bendix dominates North American tractor ABS/ESC (Wingman Fusion, EC-80/EB-80). Haldex (now SAF-Holland) dominates trailer EBS. WABCO/ZF is stronger in European-influenced specs (Volvo, Mack, IVECO). For a fleet decision: pick based on dealer support in your region and any existing supplier preference. Most fleets standardize on one tractor brake supplier (usually Bendix) to simplify parts and tech training.
Why does aftertreatment fail so often?
Modern aftertreatment (DPF + DEF + SCR) is the #1 source of unscheduled diesel truck downtime. Major fleets budget $0.05-0.15/mile for aftertreatment maintenance. Common failures: DEF heater (cold weather), NOx sensors (200-400K miles), DPF face plugging (short trips/idle), EGR cooler cracking. EPA emissions mandates are unavoidable — fleets manage cost via good PM practices and selecting OEMs with stronger aftertreatment reliability (Detroit and Volvo/Mack score higher than PACCAR and Cummins in some 2010-2017 era surveys; gap has closed post-2018).

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