A Guide to the Engine Crankshaft Position Sensor for the 2009-2017 Freightliner Sprinter 3500
Experiencing a crank-no-start or sudden stalling in your Sprinter? This guide covers the likely culprit: the crankshaft position sensor.
- A crank-no-start condition is the number one symptom of a failed crankshaft position sensor.
- The sensor is located above the starter on the driver's side; access is tight but replacement is a feasible DIY job with an E8 Torx socket.
- Sudden stalling while driving is a critical safety risk associated with a failing sensor.
- For this critical part, stick to high-quality aftermarket brands like Bosch, Bremi, or NGK to ensure reliability.
Is Your Sprinter 3500's Crankshaft Position Sensor Failing?
A faulty crankshaft position sensor in a 2009-2017 Freightliner Sprinter 3500 can cause major headaches, from leaving you stranded to causing dangerous stalling while driving. Understanding the symptoms is the first step to getting your van back on the road reliably.
Common Failure Symptoms
🎬 See a visual guide to bad crank position sensor symptoms.When this sensor starts to fail, it can be an intermittent or constant problem. Here are the most common signs:
- Engine Cranks but Won't Start: This is the most classic symptom. The starter will turn the engine over, but it will never fire up and run. This happens because the ECM has no signal to time the fuel and spark.
- Sudden Engine Stalling: The engine may cut out unexpectedly while driving, which can be extremely dangerous, especially at highway speeds. The failure can be heat-sensitive, causing the van to stall when warm and restart only after cooling down for 30 minutes or more.
- Check Engine Light: A failing sensor will often trigger the Check Engine Light and store diagnostic trouble codes, most commonly P0335 🎬 Watch a diagnostic walkthrough for the P0335 no-start code. (Crankshaft Position Sensor "A" Circuit Malfunction).
- Rough Idling and Misfires: You may notice the engine running unevenly, vibrating, or misfiring because the incorrect sensor data throws off the engine's timing.
- Poor Acceleration and Reduced Power: Inconsistent signals can lead to weak or jerky acceleration as the ECM struggles to manage the engine properly.
Recalls and Technical Service Bulletins (TSBs)
While there was a recall (H02) for the crankshaft position sensor on some 2007 Sprinter models, it does not apply to the 2009-2017 year range. No specific TSBs or recalls for the crankshaft position sensor were found for the 2009-2017 Freightliner Sprinter 3500 during the search. Always check with an authorized dealer using your VIN for the most up-to-date recall information.
Choosing the Right Aftermarket Sensor
For a critical part like the crankshaft position sensor, quality matters. While an OEM sensor from a Mercedes-Benz or Freightliner dealer is a safe bet, high-quality aftermarket brands can offer reliable performance at a better price. Based on owner experiences and general brand reputation, not all aftermarket sensors are created equal.
- Top-Tier Aftermarket (Recommended): Brands like Bosch (often the OEM supplier), Bremi, and NGK have a strong reputation for producing reliable sensors that meet or exceed OEM specifications. Many owners successfully use these brands without issue.
- Mid-Tier Aftermarket: Brands like Dorman, Standard Ignition (SMP), and Walker Products are widely available and can be a cost-effective solution. However, for a part this critical to engine operation, some owners prefer to stick with OEM or top-tier brands to avoid the risk of premature failure.
- Economy Brands: Be cautious with unbranded or extremely low-priced sensors. A faulty sensor can fail without warning, potentially leaving you stranded. The labor to replace a failed cheap part a second time will quickly erase any initial savings.
Pro Tip: Some owners report that a failing sensor can be caused by a weak or failing battery that isn't providing enough cold cranking amps. If you're experiencing sensor codes, it's worth having your battery tested to rule out a simpler problem.
Cost to Replace the Crankshaft Position Sensor
| Item | Estimated Cost |
|---|---|
| New Aftermarket Part | $41.00 - $87.13 |
| New OEM Part | $90 - $150 |
| Shop Labor | $100 - $200 |
| Total Estimated Cost (DIY) | $41.00 - $87.13 |
| Total Estimated Cost (Shop) | $141 - $350 |
Frequently Asked Questions (FAQ)
Where is the crankshaft position sensor located on a 2009-2017 Sprinter 3500?
The crankshaft position sensor is located on the driver's side of the engine, at the back where the engine meets the transmission bell housing. It is positioned just above the starter. Access is from underneath the vehicle, and it can be in a very tight space.
Can I replace this sensor myself?
Yes, this is a feasible DIY job for someone with basic mechanical skills. The sensor is held in by a single E8 external Torx bolt. 🎬 Watch this video for the sensor location and replacement steps. The main challenge is the tight access. You will need a ratchet with a 6-inch extension and an E8 socket. Some owners with smaller hands find it easier than others. Always disconnect the negative battery terminal before starting.
What happens if I ignore a failing crankshaft sensor?
Ignoring the symptoms is not recommended. An intermittent issue will likely become a complete failure, resulting in a no-start condition or a dangerous stall while driving. Continuing to run the engine with a faulty sensor can also lead to poor fuel economy and potentially damage other components like the catalytic converter over time.
Do I need to do anything after replacing the sensor?
No special calibration is required after installation. Once the new sensor is installed and the battery is reconnected, you should clear the trouble codes from the ECM using an OBD2 scanner. If the repair was successful, the codes should not return.
Helpful Videos
Technical Specifications
OEM Part Numbers: A0031532828 0031532828 68012632AA
The sensor is a 3-pin hall-effect sensor held in place by a single E8 external Torx bolt. It is located on the driver's side of the transmission bell housing.
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.
- Freightliner Sprinter 3500: