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2003 BMW 3 Series Crankshaft Position Sensor
This sensor tells the engine computer the crankshaft's position and speed so it can time the spark and fuel.
Compare crankshaft position sensor for your 3 Series in the appSigns it may need replacing
- The engine cranks but will not start, or stalls when warm
- Rough running, or an erratic tachometer
- A check-engine light
At a glance
| Part | Crankshaft Position Sensor Sensors & Modules › Engine Position & Knock |
|---|---|
| Typical life | Often 100,000 miles or more. |
| DIY difficulty | Intermediate Access depends on the engine; it may be low or behind the starter. |
Lifespans and difficulty are general. They vary with the engine, trim, driving and climate, and your owner's manual and a qualified mechanic should have the final say.
Before you buy
Use a quality sensor; cheap ones are a common cause of repeat failures.
Confirm the part fits your exact 2003 BMW 3 Series by checking your VIN, engine size and trim with the seller. The 3 Series was sold with different options across the 2003 model year, and a part that fits one build may not fit another.
Where to buy a 2003 BMW 3 Series crankshaft position sensor
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