P0107 on BMW: Causes, Symptoms and Fix Cost

The Quick Answer above is the generic definition. What follows is the model-specific detail for the BMW models that log P0107.

Beyond the generic causes listed on the main P0107 page, these are the patterns noted for BMW models:

Follow these steps to pinpoint the root cause of P0107:

1. Read every stored code before touching anything. If P0107 appears next to other low-input codes such as a throttle position or intake air temperature fault, suspect the shared 5 V reference rather than the MAP sensor itself
2. Switch the ignition on but do not start the engine, and read the live MAP value. With the engine off the manifold is at outside air pressure, so the sensor should report roughly barometric pressure, typically around 95 to 105 kPa at sea level and lower at altitude. A reading stuck near 0 to 20 kPa confirms the signal really is pinned low and is the single most useful test on this code
3. Inspect the sensor, its connector, and the harness. Look for green or white corrosion on the pins, water inside the plug, and rubbing marks where the loom crosses metal. On most engines the sensor screws straight into the intake manifold and there is no hose in the circuit at all. Only if yours uses a remote sensor on a hose should you also check that hose and its manifold port for oil sludge or a kink
4. With the ignition on and the sensor unplugged, run the test that separates a bad sensor from a broken wire: bridge the 5 V reference pin to the signal pin at the connector with a jumper wire and watch the live value. If it jumps to the top of the scale and the fault turns into P0108, the over-range code, then the signal wire and the ECU input are both healthy and the sensor is the problem. If it stays pinned low with the jumper fitted, the signal wire is broken or shorted to ground between the plug and the ECU. Simply measuring the unplugged signal pin is a weaker version of the same test, because although many ECUs pull an unloaded signal line up toward 5 V, not all of them do, so a reading near 0 V on its own is not proof of a short to ground
5. Plug the sensor back in and backprobe the connector. The reference pin should read roughly 4.5 to 5.2 V and the sensor ground should be within about 0.1 V of battery negative. A missing reference points at a broken feed wire or a short elsewhere on the same circuit
6. If the wiring checks out, make the sensor prove it can respond. On a manifold-mounted sensor, start the engine and watch the live value fall from barometric pressure to a normal idle vacuum, roughly 25 to 45 kPa, then swing back toward barometric when you blip the throttle. If the sensor unscrews easily or sits on a hose, you can apply vacuum with a hand pump instead and watch the value sweep smoothly. A value that never moves means the sensor is dead. Finish with a wiggle test on the harness while watching live data to catch an intermittent short

Estimated repair costs for P0107 in EUR, compiled across makes. Expect BMW parts and labour towards the upper end of each range.

These codes are often seen alongside P0107 or point to related issues, on any make: