4034198 Turbo Speed Sensor for Cummins ISB ISC ISL ISX Replace No. 5550060

The 4034198 and 5550060 are Turbo Speed Sensors (TSS) used in various Cummins diesel engines, including the ISB, ISC, ISL, and ISX series. These sensors monitor the turbocharger’s RPM to help the ECM optimize performance and prevent overspeed damage.

Key Details:

• Part Numbers:

  • 4034198 (older number, may be superseded)

  • 5550060 (common replacement)

• Compatible Engines:

  • ISB (5.9L, 6.7L) – Found in Dodge Ram (2003–2018+)

  • ISC, ISL (8.3L, 8.9L) – Used in medium-duty trucks & buses

  • ISX (11.9L, 15L) – Heavy-duty trucks (Freightliner, Peterbilt, Kenworth)

Symptoms of a Failing Turbo Speed Sensor:

• Check Engine Light (CEL) with turbo-related codes (e.g., Fault Code 3714 for Cummins)

• Reduced power or limp mode (engine derate)

• Turbo lag or erratic boost pressure

• False overspeed warnings

Replacement Notes:

1. Location:

   • Typically mounted on the turbocharger compressor housing or nearby.

   • On Dodge Ram ISB 6.7L, it’s near the intake side of the turbo.

2. Installation:

   • Unplug the electrical connector before removal.

   • Use a proper socket to avoid damaging the sensor.

   • No thread sealant needed (usually a threaded bolt-in design).

3. Diagnosis:

   • If you get turbo speed sensor codes, inspect wiring first—corrosion or breaks are common.

Cross-Reference/OEM Alternatives:

• Cummins OEM: 4034198, 5550060, 5299719 (latest)

• Aftermarket:

  • Standard Motor Products (SMP) TSS200

  • Dorman 904-210 (verify fitment)

Does It Fit a Dodge Ram?

✅ Yes, if your Ram has a:

• 2007.5–2018 6.7L Cummins (ISB) – Uses 5550060 or updated versions.

• Earlier 5.9L ISB (2003–2007) may use a different sensor.

⚠️ Check your engine’s exact turbo model (e.g., Holset HE351VE, Garrett) before ordering.