ISX for Fire & Emergency (EPA 07)


ISX for Fire & Emergency (EPA 07)Cummins ISX handles the largest fire equipment with ease. Every time.

Its unique dual overhead camshaft design delivers high performance and exceptional braking. The first cam drives high-pressure fuel injection for clean, responsive power. The second cam includes a dedicated set of lobes for the operation of the integrated engine brake, in addition to operating the intake and exhaust valves. High-pressure fuel injection gives the ISX cleaner, more complete combustion. The VG Turbo now has electric actuation to provide the exact amount of boost needed at every engine speed.

Every element in our integrated design is manufactured within the Cummins family. That includes features like our proven cooled-EGR subsystem, a high-pressure fuel injection system, patented VG Turbo, Cummins Particulate Filter and a crankcase ventilation system.

Cummins ISX for 2007 is designed for years of reliable service with an absolute minimum of maintenance. The 2007 ISX is offered with a 525-hp rating.


Cummins PowerSpec is an electronic tool that makes it possible to tailor the operation of Cummins engines in every on-highway application.

Available for: On-Highway, Fire & Emergency

See ISX PowerSpec Engine Features


The dual overhead cam design of the 525-hp ISX engine delivers performance you can count on, in the largest fire equipment under the most demanding duty.

Advertised Horsepower 525 hp 392 kW
Peak Torque 1650 lb-ft 2237 N•m
Governed Speed 2000 rpm
Clutch Engagement Torque 1000 lb-ft 1356 N•m
Number of Cylinders 6
Oil System Capacity 13 U.S. gallons 49.2 liters
System Weight 3,166 lb 1,436 kg
Engine (Dry) 3,009 lb 1,365 kg
Aftertreatment* 72 lb 33 kg

*Increase over standard muffler


Product Finder Specifications

Certification Level EPA 2007
Power 525 hp / 391 kW
Torque 1650 lb-ft / 2237 N•m


Engine Model Advertised hp Peak Torque Governed Speed
ISX 525 525 1650 @ 1200 2000


  • Dual Overhead Camshafts - One camshaft drives high-pressure fuel injection for clean, responsive power. The second camshaft operates the intake and exhaust valves, with dedicated lobes for the integrated engine brake.
  • Cummins Intebrake™ - Up to 600 braking horsepower for greater vehicle control, reduced service brake wear.
  • Fully Integrated Electronic Controls - A single ECM (Electronic Control Module) controls the engine and aftertreatment. Also coordinates interaction with the transmission, ABS, engine brake, cooling fan and more.
  • Variable Geometry Turbocharger - Enhanced response and control with electric actuation for infinite adjustment, providing exact boost at any rpm. Sliding-nozzle design increases reliability, durability.
  • Cooled Exhaust Gas Recirculation - Lowers combustion temperatures for reduced emissions and optimized mpg.
  • Cummins Particulate Filter - Fully integrated for uncompromising performance, reliability. Reduces particulate matter 90%.
  • Crankcase Ventilation System - coalescing filter only needs replacement every 3rd to 4th oil change.
  • Patented Mid-Stop Cylinder Liners - Robust design allows for variations in coolant chemistry.
  • High-Pressure Fuel Injection System - For cleaner, more complete combustion.
  • Low Maintenance - Go up to 15,000 miles (24,000 km) between oil drains and filter changes.


Maintenance intervals for the lubrication system on the 2007 ISX will not change.

See your Owner's Manual for every detail. And when it's time for maintenance, be sure to visit your Cummins distributor for fast, accurate service.

Maintenance Intervals
  Miles / Kilometers Hours Months
Oil and Filter 15,000 / mi24,000 km 400 6
Fuel Filter 25,000 mi / 40,000 km 800 6
Coolant Filter 50,000 mi / 80,000 km 1,500 12
Valve Adjustment 500,000 mi / 800,000 km 10,000 60
Coalescing Filter Every 3rd to 4th Oil Change
Particulate Filter 200,000-400,000 mi (320,000-640,000 km)
For complete maintenance information, please consult your Owner's Manual or Operations and Maintenance Manual.

Brochures Available

Title Bulletin Number Request View  
Cummins Particulate Filter For Fire And Emergency Vehicles Flyer (EPA 2007 and EPA 2010) 4971356 Request View  Download
New Cummins ISX '07 Diesel Particulate Filter Flyer 5410625 Request View  Download
New Cummins ISX '07 Diesel Particulate Filter Flyer - French 5410634 Request View  Download
New Cummins ISX '07 Diesel Particulate Filter Flyer - Spanish 5410635 Request View  Download
NRP - DPF There Is A Difference Brochure 5410774 Request View  Download
NRP - DPF There Is A Difference Brochure (French) 5410815 Request View  Download
NRP - DPF There Is A Difference Brochure (Spanish) 5410816 Request View  Download