The eccentric shaft sensor is a key component of BMW's VALVETRONIC system, which controls intake valve timing and duration. It monitors the rotation and position of the eccentric shaft. Failure of the eccentric shaft sensor can result in deteriorated engine performance, excess fuel consumption, excess emissions, and the engine warning light turning on. Signs of failure include sluggish engine performance, rough engine operation, and a sudden increase in fuel consumption. The eccentric shaft sensor is important for proper functioning of the VALVETRONIC system, so its upkeep is important.

1. Identifying The
Symptoms Of A
Failed BMW
Eccentric Shaft
Sensor

2. Eccentric shaft sensor is
the centerpiece of your
BMW’s VALVETRONIC
system.

3. Don’t know what is
VALVETRONIC system?

4. Well, this is something
that has made throttle
bodies obsolete in BMW
cars.

5. It’s a computerized system
that relies on different
types of sensors.
• The eccentric shaft
sensor is one of them

6. This presentation
explains;
What is an
eccentric
shaft sensor?
What purpose
does it serve?
Reasons & signs
of eccentric
shaft sensor
failure

7. Eccentric Shaft Sensor: A Brief Intro

8. You can find it attached to the
cylinder head of your BMW engine.

9. It essentially monitors the rotation
and position of the eccentric shaft.

10. The VALVETRONIC system
uses this data to control
intake valve timing &
duration.

11. If this sensor
malfunctions, engine
performance will
deteriorate.

12. BMW Eccentric Shaft
Sensor Failure: Reasons
Explained

13. Bad fuse or relay
Eccentric shaft
sensor can
malfunction due to
one of the
following reasons;
Electric short
circuit
Damaged wire
Aging
Installation error
Manufacturing
defect
Oil contamination
etc…

14. Signs Your BMW Eccentric Shaft Sensor
Has Malfunctioned

15. #1 - Engine lacks
power

16. One indicator of eccentric shaft
sensor failure in a BMW is sluggish
performance.

17. Sluggish engine performance
may also signify numerous
other things.
• A mechanic will be able to
exactly what the problem
is…

18. Sign #2 - Excessive
fuel consumption

19. VALVETRONIC works with
VANOS to control intake
valve timing & duration.

20. If it starts acting up due
to a bad eccentric shaft,
the engine will run rough.

21. And, yes… you’ll notice a
sudden hike in the rate of
fuel consumption.

22. Sign #3 - Excess
exhaust emissions

23. Has your BMW been
emitting a lot of exhaust
fumes lately?

24. The cause could be a
defective eccentric shaft
sensor.

25. Sign #4 - Engine
warning light on

26. Engine warning light may
also signify a problem
with the eccentric shaft.
• Retrieve the error code
to find out what exactly
is wrong with your BMW.

27. In Summary;

28. Eccentric shaft sensor
helps the VALVETRONIC
system with many
different things.
• So, ensure the upkeep of
your BMW’s eccentric
shaft sensor.

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