The 2021 BMW M135I has one listed ignition part: a Camshaft Position Sensor from HOLSTEIN, covering the 2.0L L4 Turbocharged — the only engine offered in the 2021 BMW M135I. It includes a manufacturer part number and application notes.
On the 2021 BMW M135I, the ignition system delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules.
The part number opens a page with every vehicle that part fits.
Camshaft Position Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HOLSTEIN | 2CAM0303 | 🇲🇽 MX | View on Amazon |
This table covers the sensors that report camshaft position to the ECU. Typical signs include a stall, a no-start, or a code for cam or crank correlation. Check the connector and the reluctor gap before replacing the sensor.
One part is listed for the 2021 BMW M135I — HOLSTEIN 2CAM0303.
Buying Ignition Parts for a 2021 BMW M135I
On this vehicle, the ignition system delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules.
- Confirm you have the 2.0L L4 Turbocharged engine — every part on this page is matched to it.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace plugs and wires (or coil boots) as a set — one weak cylinder makes the whole set feel bad.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Camshaft Position Sensor .
Frequently Asked Questions
How many ignition parts fit the 2021 BMW M135I?
This page lists one ignition part for the 2021 BMW M135I: a Camshaft Position Sensor from HOLSTEIN, covering the 2.0L L4 Turbocharged engine.
What are the signs of ignition problems on a 2021 BMW M135I?
Common symptoms include misfires under load, rough idle, flashing check-engine light, or poor starting in damp weather. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, replace plugs and wires (or coil boots) as a set — one weak cylinder makes the whole set feel bad.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2021 BMW M135I was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2021 BMW M135I?
Every part on this page is matched to the 2.0L L4 Turbocharged engine. Then gap matters even on “pre-gapped” plugs — verify against spec, and replace coil boots when they come off a high-mileage engine. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2021 BMW M135I
Ignition Parts for Other BMW M135I Years
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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.