Guide to the Starter for the 2007-2015 BMW 335i
Don't get stranded by a no-start condition; understand the causes, symptoms, and how to choose the right replacement starter.
- Starter replacement is a difficult, labor-intensive job because the part is located under the intake manifold.
- Always test the battery before replacing the starter, as symptoms of a weak battery and a failing starter are nearly identical.
- For best results, use a new starter from an OEM supplier like Bosch or Valeo due to the high labor cost of the repair.
- Verify if your vehicle has the Auto Start/Stop feature, as it requires a different starter part number.
Is Your BMW 335i Starter Failing?
A failing starter is a common issue that can leave you stranded. The most frequent sign is a single, loud 'click' when you press the start button, with nothing else happening. You might also experience a slow, sluggish crank, where the engine seems to struggle to turn over. Eventually, these symptoms lead to a complete no-start condition. However, these signs can also point to a weak or dead battery, so it's important to test your battery first to avoid a misdiagnosis.
🎬 Watch: Troubleshooting a slow crank or no-start condition.Choosing the Right Aftermarket Starter
Because replacing the starter on a 335i is a labor-intensive job, choosing a high-quality part is critical to avoid doing the work twice. The part itself is not the expensive part of the job; the labor is. Here’s a breakdown of the brands available:
- Tier 1 (OEM Supplier): Bosch & Valeo
Bosch and Valeo are the Original Equipment (OE) manufacturers for BMW, meaning they made the starter that came with your car from the factory. Choosing a new aftermarket starter from one of these brands is the safest bet for reliability and perfect fitment. Forum members and mechanics strongly recommend using these brands to ensure longevity. BMW later switched from Bosch to Valeo as the OE supplier for many models. - Tier 2 (High-Quality Aftermarket): Denso
Denso is a major Japanese parts manufacturer known for producing components that meet or exceed OEM quality. They are a trusted name in the industry and a solid choice for your BMW if a Bosch or Valeo unit is not available. - Tier 3 (Value Brands): Remy & BBB Industries
These brands offer a more budget-friendly option. While they can provide good value, their long-term reliability on a high-performance vehicle like the 335i is less documented than the OEM suppliers. Given the high labor cost for this specific repair, saving a small amount on the part itself is a significant risk.
A Note on Auto Start/Stop
Later model year 335i vehicles (mainly 2012 and newer) may be equipped with an Automatic Start/Stop function. These vehicles use a different, more robust starter. It is critical to verify with your car's VIN whether you need a starter for a vehicle with or without this feature.
Known Issues, Recalls, and Service Bulletins
While there have been starter-related recalls on other BMW models, searches of the NHTSA database did not show any active recalls or specific Technical Service Bulletins (TSBs) for starter failure on the 2007-2015 335i. The failures seen on these cars are generally due to normal wear and tear over time and mileage.
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket (Your Price Range) | $121.52 - $319.55 |
| New OEM (Dealer) | $350 - $825+ |
| Shop Labor | $340 - $500 |
| Total Professional Replacement | $680 - $1,320+ |
Frequently Asked Questions
Can I replace the 335i starter myself?
This is a difficult DIY job recommended only for experienced home mechanics. The starter is located under the intake manifold, which must be completely removed for access. The job takes several hours and requires special tools like E-Torx sockets and a flex-head ratchet for a hard-to-reach bolt. 🎬 Watch: Ultimate guide to replacing your N54 starter. The aluminum starter bolts are single-use and must be replaced.
Is it the starter or the battery?
The symptoms are very similar. A slow crank or a single click can be either a bad starter or a weak battery. Before buying a starter, have your battery professionally load-tested. Most auto parts stores offer this service for free. This simple step can save you hundreds of dollars in unnecessary repairs.
What does a failing starter sound like?
The most common sound is a single, sharp 'click' when you press the start button. This is the sound of the starter's solenoid engaging, but the motor itself failing to turn. You might also hear a grinding noise if the starter gear is not engaging properly with the flywheel, or a slow, whining sound from a worn-out motor.
Why is the labor cost so high to replace the starter?
The labor cost is high due to the starter's location. On the 335i's N54 and N55 engines, the starter is buried deep in the engine bay, underneath the entire intake manifold assembly. A mechanic must spend several hours removing the manifold and other components just to access the two bolts holding the starter in place.
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Technical Specifications
OEM Part Numbers: 12412354701 12417616502 12417638195 12417631559 12417610342
Voltage: 12V, Power Output: ~1.1kW - 2.0kW, Rotation: Clockwise, Number of Teeth: 9. Note: Power output and specific design may vary based on OE supplier (Bosch/Valeo) and if the car is equipped with Auto Start/Stop.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- BMW 335i: