Freightliner M2 Business Class Fuel Tanks

Frequently Asked Questions About Freightliner M2 Business Class Fuel Tanks

What are the available fuel tank sizes for my Freightliner M2, and how do I determine which size fits my truck?

Freightliner M2 Business Class trucks typically accommodate fuel tanks ranging from 50 to 100 gallons, with 60-gallon and 80-gallon tanks being the most common. To determine the correct size for your truck, check your door jamb sticker for the original equipment specifications, measure your existing tank's dimensions (length x width x height), or verify the mounting bracket spacing on your frame rails. The M2 106 and M2 112 models generally use the same tank mounting configurations, but always confirm your specific year and chassis configuration before ordering.

Are these fuel tanks compatible with all M2 model years, and what are the key differences between years?

Most aftermarket fuel tanks fit M2 Business Class trucks from 2003 to present, but there are important variations. Pre-2007 models often have different strap configurations and sending unit connections compared to 2007+ models. Trucks built after 2010 may require tanks with specific DEF system clearances. Additionally, trucks with hydraulic equipment or special body applications might need custom tank straps or modified mounting brackets. Always verify your OEM and model year when ordering to ensure proper fitment.

What materials are these fuel tanks made from, and how long can I expect them to last?

Fuel tanks for the M2 are available in either aluminum or steel construction. Aluminum tanks are lighter (approximately 40% less weight than steel), resist corrosion better, and typically last 15-20 years with proper maintenance. Steel tanks are more affordable upfront but require protective coating and may need replacement after 8-12 years depending on your operating environment. Both materials meet DOT specifications, but aluminum is generally preferred for weight savings and longevity, especially in regions using road salt.

Can I install a replacement fuel tank myself, or do I need special tools and expertise?

While fuel tank replacement is possible for experienced mechanics, it requires specific safety precautions and tools. You'll need a transmission jack or tank jack to safely support the tank, proper fuel transfer equipment, and new tank straps and hardware. The job typically takes 2-4 hours and involves draining the old tank, disconnecting fuel lines and electrical connections, removing mounting straps, and reversing the process with the new tank. Many customers choose professional installation due to fuel handling safety concerns and the need to properly torque mounting hardware to manufacturer specifications.

Do these replacement tanks come with all necessary mounting hardware and accessories?

Most replacement fuel tanks are sold as tank-only units without straps, sending units, or mounting hardware. You'll typically need to purchase tank straps separately (usually $75-150 per set) and transfer your existing sending unit, fuel pickup, and venting components from your old tank. Some tanks include new gaskets for the sending unit, but you should budget for a complete installation kit including new fuel line connections, vent hoses, and mounting bolts. Check product descriptions carefully to understand what's included and what additional parts you'll need to complete the installation.