Where is the BMW intake pressure sensor located?

[DiRafael]

BMW intake pressure sensor is installed next to the throttle body. Intake Pressure Sensor: As the name suggests, the intake pressure sensor detects a series of resistance and pressure changes according to different engine speeds and loads, converting them into voltage signals for the ECU to adjust fuel injection quantity and ignition timing angle. Symptoms of Intake Pressure Sensor Failure: Open or short circuit in the sensor's internal wiring; Difficulty starting the engine; Sensor output voltage signal too large or too small; Values deviate from normal range; Abnormal engine performance; Unstable idle; Sensor output signal does not change with intake manifold vacuum; Increased fuel consumption; Lack of power during acceleration, etc.

[SanAlana]

As a BMW mechanic with ten years of experience, I must say the intake pressure sensor is quite cleverly hidden. It's usually located on the intake manifold, that thick pipe connected to the engine. If you're driving an older naturally aspirated model like the E90 325i, you can spot it behind the air filter when you pop the hood. The newer turbocharged models are much more complicated - some are tucked near the intercooler outlet, like in G-series models where you often need to remove the engine cover to access it. If you're doing it yourself, I recommend checking the service manual first since the location varies significantly between engine types. Last week when I was troubleshooting an F30 328i's fault code, I spent ages finding it positioned between the turbocharger and throttle body, requiring a special wrench for removal.

[Malcolm]

This is a common question from customers during car repairs. BMW's intake pressure sensors are typically located at key points in the intake system. Open the engine compartment and follow the black plastic piping from the air filter towards the engine – the sensor is mounted there. For turbocharged models, there might be two locations: one before the turbo measuring atmospheric pressure, and another post-turbo at the intake manifold measuring actual intake pressure. Be cautious with electrical connectors during DIY checks – I once saw an owner forcefully pull and damage a plug. This is particularly noticeable on older inline-six engines like the N52, where it's mounted right atop the manifold. However, newer engines like the B48 often hide these sensors under decorative covers, requiring removal of five or six screws for access.

[OPaige]

When I studied BMW engines, I specifically noted the location of this component. The design principle is straightforward: it must be in direct contact with the intake airflow, so it's always located on the intake manifold itself. The exact position depends on the chassis code—older E-chassis models have it in a prominent spot on top of the engine, while newer G-chassis models often require removing the entire intake piping to access it. The sensor near the turbocharger measures boost pressure, while the one behind the throttle body monitors manifold vacuum. If you're working on it yourself, remember to disconnect the battery's negative terminal to avoid blowing a fuse. I've seen DIY enthusiasts mistakenly unplug the intake air temperature sensor—these two are often positioned close together on the manifold, but their connector shapes differ for easy identification.