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2017 Model S "Service Required" Message - Drive Unit Issue?

0

Rachel A. · rep 0 · May 22, 5:19 AM · 1 replies · solved · Question

Vehicle: 2017 Tesla Model S 75D

Hi everyone,

My 2017 Tesla Model S 75D has started showing a persistent "Service Required" message on the main display. It's been on for a couple of days now. I haven't noticed any immediate performance issues, but sometimes I hear a faint, high-pitched whine from the rear when accelerating or decelerating, which wasn't there before.

I'm concerned this might be related to the drive unit, as I've heard about issues with older Model S drive units. Has anyone experienced this specific combination of symptoms? Is there a way to check for specific diagnostic codes without a Tesla service appointment?

Any insights or similar experiences would be greatly appreciated!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:19 AM

0

ClearTheCode admin answer:

A "Service Required" message, especially when accompanied by unusual noises from the rear of your 2017 Model S, strongly suggests a potential issue with the drive unit. This was a known area of concern for some early Model S vehicles.

Here are the common causes and what to consider:

  1. Drive Unit Bearing Wear: This is one of the most common culprits for whining noises in older Tesla drive units. Over time, the bearings can wear out, leading to increased friction and noise, which the car's diagnostics will eventually detect.
  2. Inverter or Motor Component Failure: While less common than bearing issues, problems with the motor's stator, rotor, or the power inverter can also trigger a "Service Required" message and affect performance or generate noise.
  3. Sensor Malfunction: A faulty sensor within the drive unit or related systems could be sending incorrect data, leading the car to believe there's a problem, even if the mechanical components are still functioning.
  4. Gearbox Issues: Although integrated, the gearbox components within the drive unit can also experience wear or lubrication issues, contributing to noise and error messages.

What You Can Do:

  • Listen Carefully: Try to pinpoint the exact nature and location of the sound. Does it change with speed? Is it present during regeneration or only acceleration?
  • Monitor Performance: Pay close attention to any subtle changes in acceleration, deceleration, or range, even if not immediately obvious.
  • No DIY Code Reading: Unfortunately, Tesla vehicles do not use standard OBD-II ports for comprehensive diagnostics in the same way traditional ICE cars do. Their diagnostic systems are proprietary and require Tesla's specialized tools.

When to See a Shop:

  • Immediately. A persistent "Service Required" message, especially with accompanying noises, should not be ignored. Drive unit issues can escalate, potentially leading to a complete failure or unsafe driving conditions.
  • Schedule a service appointment with Tesla as soon as possible. They will be able to read the specific internal diagnostic codes and perform a thorough inspection of the drive unit to determine the exact cause and necessary repairs.
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