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Fuel Pump
The fuel pump pressurizes and delivers fuel from the tank to the engine's fuel delivery system. It can be an in-tank electric pump on fuel-injected vehicles or a mechanical pump on older carbureted engines.
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Buying Guide
Fuel Pump Buying Guide
The fuel system stores, delivers, and meters fuel to the engine. This guide covers fuel tanks and pumps, plus the separate diesel exhaust fluid (DEF) system.
Fuel Tank
Fuel tanks fail from rust (steel tanks), cracking (plastic tanks), or collision damage. When replacing:
Steel tanks: inspect welded seams and the sender unit mounting flange for rust-through before declaring the original beyond repair
Plastic tanks: can crack from age and impacts; often a more straightforward replacement
Straps and evap lines: Fuel tank straps and evaporative emission hoses should be inspected and replaced if corroded or cracked when the tank is dropped.
Fuel Pump
The fuel pump is the heart of the fuel delivery system. When diagnosing fuel delivery issues:
Check fuel pressure with a gauge — low pressure points to pump failure
Listen for the pump prime sound (2-second hum) when the key is first turned; no sound may indicate pump or relay failure
Check the fuel pump relay and fuse before condemning the pump
In-tank pump modules combine the pump, sending unit, strainer, and pressure regulator in one drop-in unit. This is the most common modern design — replacing the module replaces all of these components together.
Diesel exhaust fluid (DEF/AdBlue) is a separate fluid system from fuel, used by the selective catalytic reduction (SCR) system to cut NOx emissions.
Exhaust Fluid (DEF) Tank
The DEF tank stores AdBlue for the SCR system. It is separate from the fuel tank. The level sensor may be integrated — verify before purchase. DEF tanks should never be filled with diesel, or vice versa — contamination destroys the SCR system.
Exhaust Fluid (DEF) Pump
The DEF pump pressurizes and meters DEF from the tank into the SCR system. It is sold separately from the tank and supply lines. DEF pump failure typically triggers warning lights and, if unaddressed, can trigger a speed-limiting "limp" mode on modern diesels.
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ShopEarl.com is a network of American auto part suppliers - salvage yards, aftermarket vendors, and powertrain remanufacturers.
Our mission is to make finding the right auto part easy, affordable, and environmentally friendly by giving quality used parts a second life and keeping them out of landfills.
We use a comprehensive vehicle fitment database that matches parts to specific makes, models, years, and engine types.
For critical components like engines and transmissions, we also require VIN verification for your vehicle to ensure an exact match. The VIN (Vehicle Identification Number) contains specific information about your vehicle's configuration that helps identify the exact parts it needs.
If you're ever unsure about fitment, our team is available to help verify compatibility before you make a purchase.
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ShopEarl.com offers free shipping within the continental United States. Shipping times can vary depending on shipping methods, and ‘unbolted’ used parts typically ship a day faster than ‘yard’ parts that have to be professionally dismantled from the vehicle first. You’ll receive email and text notifications every step of the way.
Delivery to commercial locations is always free, but larger parts that ship freight may incur surcharges if they are delivered to a residential address. You can always ship these for free to a repair facility or our team can help find a nearby commercial address for local pickup.
At the moment, we don’t offer expedited shipping options. However, we’re always looking for ways to improve our services, and we hope to offer faster shipping options in the future.
All parts come with a minimum 30 day return window from the date your part arrives. See full return policy for all the details.
A core charge is a refundable fee charged when you buy a part that can be rebuilt or remanufactured, like an engine, alternator, or transmission. It works like a deposit:
- You pay the core charge upfront when you buy the part.
- After installing the new part, you return the old part (the “core”) to the seller.
This system encourages recycling and helps manufacturers refurbish used parts instead of making new ones from scratch.
Used parts are OEM auto parts professionally dismantled by certified auto recyclers.
Remanufactured parts are used OEM parts that have been completely disassembled, cleaned, and rebuilt with new components where necessary. They're tested to meet or exceed original equipment specifications, and often come with warranties similar to new parts.
New parts are new, aftermarket components that have never been installed on a vehicle.