Where is the fuel pump module located in a BMW 320?

[JeremiahDella]

The fuel pump control module of a BMW 320 is positioned above the fuel tank. Here are the specific details: 1. Consequences of fuel pump failure: If the vehicle's fuel pump control module is damaged, symptoms such as increased fuel consumption and black smoke from the exhaust pipe will occur. A damaged fuel pump module needs to be replaced promptly to prevent the vehicle from failing to start. 2. Symptoms of fuel pump failure: A damaged fuel pump cannot pump fuel, leading to a collapse of the fuel supply system and preventing the vehicle from starting; damage to the fuel pump's check valve results in no residual pressure, failing to meet the required fuel pressure value, significantly reducing atomization efficiency and causing difficulty in starting, requiring prolonged and repeated ignition attempts; wear of the centrifugal pump impeller leads to reduced fuel supply pressure, absence of the fuel pump's operational sound, inadequate fuel supply, weak acceleration, and unusual noises like buzzing while driving; mechanical failures such as rotor jamming: increased operating current of the fuel pump, causing damage to relays or fuses; the engine warning light illuminates, and the engine exhibits abnormal vibrations.

[SanLondyn]

I remember when my own BMW 320 had a fuel pump module issue, I specifically researched its location. This fuel pump control module is usually hidden under the rear seats, requiring the seat cushion to be lifted for access. Once, a friend's car had jerky acceleration, which turned out to be caused by water corrosion on the module's connector. Actually, placing it under the rear seats is quite logical—it's close to the fuel tank for easy wiring and reduces cable length to avoid electromagnetic interference. However, it's worth noting that locations vary across different BMW model years, with some newer models relocating it behind the left trunk trim panel. Those with good DIY skills can remove the seat to check for connector oxidation, but if there's no power at all, it's best to seek professional repair—removing the fuel tank is skilled work.

[Delaney]

Last time when I accompanied my friend to repair his car, I specifically checked the location of the fuel pump module on the BMW 320. It's right under the right rear seat—just flip the seat forward to find it. This little black box is particularly prone to moisture damage, especially in rainy southern regions, often leading to poor contact issues. I recommend regularly checking if the carpet under the seat is leaking, as many owners aren’t aware that water can seep along the wiring to the module. The most extreme case I’ve seen was after a car wash, the module short-circuited and burned out, costing nearly two thousand at the dealership for a tow and repair. Here’s a DIY tip: keep a can of electronic contact cleaner handy; if you spot white or green oxidation on the connectors, just spray it to prevent major issues. If this module fails completely, the car will stall on the roadside and won’t start.

[VonJaxon]

Just checked my repair manual - the BMW 320 fuel pump module is located at chassis position R19, specifically under the rear seats. When you lift the seat, you'll see the fuel tank cover plate, and the module is mounted on the bracket atop the fuel tank. After a heavy rainstorm, my car threw a 'low power' trouble code, which turned out to be caused by oxidized contact terminals on this module leading to power supply issues. The design location is quite problematic - just a bit of moisture can cause failure. Newer models have relocated it behind the left-side trunk liner panel, requiring removal of the jack for access. Recommendation: Avoid washing your car immediately after summer sun exposure, as thermal expansion/contraction can compromise the seal. Regular owners shouldn't attempt DIY removal - working near fuel tanks is hazardous.

[VanSophia]

I've researched this issue. In this generation of BMW 3 Series, the fuel pump control module is basically located directly beneath the right rear seat cushion. If you run your fingers along the edge of the seat downwards, you can feel a metal-cased component about the size of a matchbox. Two years ago, while helping my cousin repair his car, I discovered a typical fault: the module's bottom is tightly pressed against the metal bracket of the fuel tank, and prolonged vibration can cause cold solder joints on the circuit board. The symptom is that the car starts normally when cold but suddenly stalls after about half an hour of driving. The solution is to install vibration-damping pads or directly replace it with an improved version of the module. Note that this control box is connected to a plug with dozens of fuel line wires, and unplugging it yourself might damage the clips. If you notice this problem, it's advisable to call for a tow truck directly rather than attempting to start the car forcefully to avoid damaging the fuel pump.

[HenryLee]

Witnessed firsthand the technician disassembling it. The 320's fuel pump module is stuck at the top of the fuel tank, requiring the rear seat to be removed first. This location was originally designed for heat dissipation, but ironically became a hotspot for repairs. Once, my car's fuel gauge was acting erratically, and diagnostics revealed it was due to the module's resistance drift. Later, I learned that BMW often hides the fuel filter under the same cover, leading many owners to mistakenly purchase just the filter and waste their effort. If you're handy, you can do it yourself: disconnect the battery's negative terminal, use a T20 screwdriver to remove the rear seat cushion, and pry open the black fuel tank cover to access it. It's crucial to prepare a new sealing ring beforehand, as the old one is almost guaranteed to have aged and cracked.