ISX12 for Fire & Emergency (2013)


ISX12 for Fire & Emergency (2013)

ISX12 for 2013.  
Better. Where It Counts.

Better And Better.
The ISX12 was introduced in 2012 as the ideal combination of proven technology from the ISX15 in a compact package. It proved to be an excellent fit for many mid-size pieces of fire apparatus, delivering exceptional performance and fuel economy with the reliability and durability customer expect. For 2013, we’re taking this technology to the next level – meeting new emissions and fuel economy standards a year ahead of schedule. All while providing the power you need, with ratings from 370-500 hp (276-373 kW).

Better. In Every Way.
Cummins ISX12 is designed to deliver better performance, reliability, fuel economy and durability. The ISX12 is easily customizable, including many electronic engine features and adjustable parameters.  Maintenance is virtually unchanged from previous models. Plus, every ISX12 is backed by the largest and most capable customer support network in the business, with Cummins Care representatives available at 1-800-DIESELS™ to answer product questions and provide assistance during a repair or service event.

For high performance and reliability with low maintenance and overall costs, you can’t do better than Cummins ISX12 for 2013.

Better Optimization.
Cummins is the only engine manufacturer to design, develop and support every component from the air intake to the exhaust aftertreatment in a totally integrated system. This allows us to optimize critical systems and deliver performance to emergency responders in a way that other engine manufacturers using outside suppliers can’t match.

Better Coverage.
In addition to a comprehensive base warranty, Cummins ISX12 offers you a variety of extended coverage plans for up to 10 years/200,000 miles (321,869 km).


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


Advertised Horsepower

370-500 hp

276-373 kW

Peak Torque

1450-1645 lb-ft

1966-2232 Nm

Governed Speed

2100 rpm

Clutch Engagement Torque

800 lb-ft

1,085 Nm

Number of Cylinders


System Weight

2880 lb

1306 kg

    Engine (Dry)

2640 lb

1197 kg

    Aftertreatment  System*

204 lb


*Increase over standard muffler; does not include chassis OEM-supplied components

Product Finder Specifications

Certification Level EPA 2013
Power 370 - 500 hp / 276 - 373 kW
Torque 1450 - 1645 lb-ft / 1966 - 2230 N•m


Engine Model Advertised Horsepower (hp) Peak Torque lb-ft (Nm) @ rpm
ISX12 370 370 (276) 1450 (1968) @ 1100
ISX12 400 400 (298) 1450 (1968) @ 1100
ISX12 400 400 (298) 1550 (2130) @ 1100
ISX12 425 425 (317) 1550 (2130) @ 1100
ISX12 450* 450 (336) 1550 (2130) @ 1100
ISX12 500* 500 (373) 1645 (2232) @ 1100

*Restricted ratings


VGT™  Turbocharger from Cummins Turbo Technologies – The patented design is widely recognized as the industry leader for performance. Electric actuation improves precision and responsiveness. The VGT Turbocharger also increases fuel economy and braking horsepower.

XPI Fuel System From Cummins Fuel Systems – Delivers superior performance regardless of engine rpm. Multiple injection events per cycle improve fuel efficiency and enable smoother, quieter operation.

Cummins Aftertreatment System from Cummins Emission Solutions – Proprietary system consists of a Diesel Particulate Filter (DPF) and Selective Catalytic Reduction (SCR) technology for near-zero emissions.

Fleetguard® Fuel Filters, Lube Filters and DEF from Cummins Filtration
– Fleetguard filters protect against corrosion and contaminants that can cause performance issues. High quality DEF is widely available at authorized Cummins and Fleetguard locations, as well as in bulk delivery.

Single High-Capacity Electronic Control Module (ECM) – A single ECM manages the engine and aftertreatment system for optimum performance and fuel efficiency.


Maintenance Item




Oil & Filter

15,000 mi
24,000 km



Fuel Filter

30,000 mi
48,000 km



Coolant Filter**

50,000 mi
80,000 km



Standard Coolant

250,000 mi
400,000 km



Valve Adjustment

250,000 mi
400,000 km



Crankcase Breather Filter

150,000 mi
240,000 km



DEF Filter

300,000 mi
480,000 km



Particulate Filter

200,000 mi
320,000 km



Consult your Operations and Maintenance Manual for more information.

*Assuming severe duty cycle for fire/emergency vehicle applications and using CJ-4 oils meeting CES 20081
**With appropriate filter

Brochures Available

Title Bulletin Number Request View  
2017 Engines And Commercial Mobile Generators Brochure For Emergency Vehicles 5410731 Request View  Download
Driver Tips Card For Fire And Emergency Vehicles (2013) 4971424 Request View  Download
Engines And Commercial Mobile Generators For Fire And Emergency Applications Brochure F-2102 (2013) 4971428 Request View  Download
ISX12 For Fire And Emergency Applications Flyer (2013) 4971411 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
ReCon DPF Flyer 2878897 Request View  Download
ReCon DPF Flyer - French 5410632 Request View  Download
ReCon DPF Flyer - Spanish 5410633 Request View  Download