What is the number of the fuel pump relay for the Passat Lingyu?
4 Answers
The fuel pump relay for the Passat Lingyu is No. 372. Composition of the fuel pump relay: As a control device, the relay is connected in a circuit and requires two control systems—the input circuit (also known as the control system) and the output circuit (also known as the controlled system). Specific characteristics of the fuel pump relay: Generally, a relay has several main contacts, along with two coil contacts, resembling a contactor. The main contacts are connected to the controlled system, while the coil contacts are linked to the control system. However, the contacts of a relay are usually visible. Function of the fuel pump relay: The primary function of the fuel pump relay is to control a high-power circuit with a very small current, while also expanding the control range. When a signal reaches a certain value, it can switch, disconnect, or connect multiple circuits simultaneously based on the different forms of contact groups, achieving automatic switching. Another function is to adjust the opening and closing of the fuel pump as needed to ensure the normal operation of the engine.
I've driven a Passat Lingyu for over ten years and remember the fuel pump relay quite clearly. It's usually located in the fuse box under the lower left corner of the driver's seat. In my 2008 model, it was number 167, positioned in the second row, third spot. However, be aware that older B5 platform models might have different numbers—I've seen cases with number 372. Before working on it, I recommend checking the diagram on the back of the fuse box cover, which typically indicates the fuel pump relay's position. If you can't find the number, don't panic—just use a multimeter to check the power supply. The relay itself costs around a few dozen bucks, but don't skimp and buy a no-name brand. I once replaced mine with an aftermarket part, and it failed within six months. Ideally, consult the original repair manual. If that's not possible, taking a photo of the relay to match at the parts market is the easiest solution.
With nearly two decades of auto repair experience, I can identify Volkswagen relays blindfolded. For the Passat Lingyu, the fuel pump relay is commonly the 167 model, located in the fuse box on the left side of the driver's leg, towards the inner side. In actual repairs, I've found that vehicles produced before 2009 mostly use the electronically controlled 167 model, while later facelifts might switch to the 372 model. Always turn off the engine and disconnect the power before working. Use needle-nose pliers to pull the relay straight out, and you'll see the number marked on the base. A word of caution: watch out for pin oxidation—I've handled many poor contact cases caused by verdigris. If a relay failure prevents the car from starting, you can temporarily bridge the fuel pump fuse to the starter relay circuit as an emergency fix.
With a decade of research in automotive circuits, the fuel pump relay in the Passat Lingyu is a classic case. It's typically located in two positions: the older models use relay 167, while newer ones use 372. The exact installation point is under the steering wheel in the driver's compartment—just remove the plastic cover to reveal the fuse box matrix. The relay is essentially an electromagnetic switch that controls the fuel pump's power supply. If you don't hear the fuel pump during startup, there's an 80% chance the relay has failed. When removing it, gently press the clips—avoid yanking forcefully. Opt for replacement parts with metal bases, as plastic ones are prone to heat deformation. Actually, Volkswagen relays have strong compatibility—models like the Golf and Sagitar with the same part number can serve as temporary substitutes.
