The fuel pump is your vehicle’s unsung hero. It takes gas from the gas tank and sends it to the engine so your car, truck, or SUV can start and run. Your vehicle’s fuel pump should last at least 100,000 miles or more.
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What is E85 BMW?
The E85/E86 generation was produced from 2002 to 2008. The E85/E86 replaced the Z3 and is the third model in the BMW Z Series. Initial models were in the roadster (E85) body style, with the coupรฉ (E86) body style being added in 2006. In February 2009, the BMW Z4 (E89) began production as the successor to the E85/E86.
How much is a fuel pump for a 2005 BMW?
The average national cost for a fuel pump replacement across all vehicles is roughly between $611 and $894.
How do you check a fuel pump on a BMW?

Are aftermarket fuel pumps good?
Better Quality Materials. Buying an aftermarket fuel pump is a huge gamble. Many aftermarket parts are built with inferior materials to help the manufacturers save a few bucks. Even if you find an aftermarket fuel pump, it’s likely that it won’t fit your car well and perform optimally with it.
What are signs fuel pump is going bad?
A bad fuel pump may overheat and inadequately deliver gas to the engine, causing it to run hot and turn off while on the road. In this scenario, your vehicle may start back up after overheating and shutting down, only to do the same thing a half-hour later. This scenario is a common sign of a bad fuel pump.
Can BMW run on E85 gas?

Can BMWs run on E85?
A stock BMW DME will be able to run mixtures around E20 without any issues. Aftermarket software and tuning will allow most direct injected BMW’s to run around E40 fuel before the low-pressure fuel pump cannot flow any more fuel. As a fair warning, once you start running e85 there is almost no going back!
Can I put E85 in my BMW 328i?
On a stock 328i, will you gain anything or lose? You should not run E85 on a stock car without an tune for E85. It should not hurt anything, the N54 and N55 have successfully been running E85 tunes as well.
How much does it cost to fix a BMW fuel pump?
How much does fuel pump replacement cost? The average national cost for a fuel pump replacement across all vehicles is roughly between $611 and $894. Your BMW might be more (or less) than that, but you’ve come to the right place on KBB.com.
How much is a fuel pump for 325i BMW?
The average cost for BMW 325i Fuel Pump Replacement is $578.
How much does it cost to replace a high pressure fuel pump on a BMW?
Labor costs are estimated between $207 and $261 while parts are priced between $1,114 and $1,153.
How do I know if my BMW fuel pump is bad?
- Delayed start of the engine.
- Hesitation or sputtering in acceleration between 2000 RPM to 4000 RPM.
- High engine temperatures.
- Vehicle stalling due to exertion or temperature.
- Fuel pressure gauge reading low measurements.
- Poor gas mileage.
What should BMW fuel pressure be?
Most BMW engines require a fuel pressure of 3.5 bars (51 psi), with a deviation of plus or minus . 2 bars (3 psi) allowed. High-performance M engines require higher fuel pressures, usually, 5 bars (73 psi) with a deviation of plus or minus . 2 bars (3 psi) allowed.
What causes fuel pump failure?
The top reasons for fuel pump failure are contamination, overheating, and the gears in the the fuel pump wearing out over time. Rust, debris, and dirt are three common particles that can somehow enter the gas tank and be fed towards or through the intank fuel filter and possibly into the fuel pump.
What brand of fuel pump is best?
For the best fuel pump, we recommend the TopScope Fuel Pump. This fuel pump is durable, reliable, and includes a fuel pressure regulator. For a budget-friendly fuel pump, the Yoneda Electric Fuel Pump 12V is an ideal substitute. The fuel pump is easy to use and works with a variety of vehicles.
Will upgrading fuel pump increase horsepower?

How long do aftermarket fuel pumps last?
Electric fuel pumps are able to generate high pressure within the fuel lines and move gas all the way to the engine. But whatever type of fuel pump you have, you can expect them to last for 100,000 miles or even beyond depending on your driving practices. They are reliable, to say the least.
Does a bad fuel pump throw a code?
Bad Fuel Pump, Fuel Pressure Sensor Can Trigger ‘Check Engine’ Light, P0087 Code. Your car’s “Check Engine” or “Service Engine Soon” light can flash on for more than 1,400 different reasons.
How does a car act when the fuel pump is going out?
If your vehicle’s fuel pump cannot get gas from the tank to the engine, you will have trouble starting your car. The car will struggle to start and run because the pump cannot push enough gas through. A worn pump loses its pressure and the engine is being starved of gasoline.
How can I test my fuel pump?

Can a 335i run E85?
You can’t run straight E85 due to the fueling issues we have. We would need a bigger pump and injectors to go straight E85, and thats not available currently. Injectors are too small and fuel pump isnt ready for it. You would need some pretty darn big injectors to run straight ethanol.
Should I put ethanol free gas in my BMW?
The short answer is, no, ethanol-free gasoline is not bad for your car. Most cars today can run on ethanol gas blends up to E15 (15% ethanol) and on non-ethanol gasoline. And flex fuel vehicles can handle up to E85 (85% ethanol) without a problem.
Can you run E85 without flex fuel?
It isn’t absolutely necessary, but if you have a tune for 91/93 pump and a tune for E85, you will need to run the tank to almost empty for either to work alone without a flex fuel kit.
What happens if you run E85 without tune?
Unless you’re running over 15 PSI of boost, ethanol does nothing for you and also can damage the fuel pump and certain other items that are degraded by exposure to ethanol content above 15%. Lastly, ethanol is hygroscopic (it attracts and is soluble with water), so it can introduce water into your fuel system.