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2018 Q50 Red Sport Turbo Failure & Coolant Loss - Anyone Else?

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Dan C. · rep 0 · May 22, 5:10 AM · 1 replies · solved · Question

My 2018 Infiniti Q50 Red Sport 400 with about 65,000 miles has been giving me headaches. I've noticed significant coolant loss, requiring me to top it off every few weeks. There are no visible leaks on my garage floor.

Recently, I've also heard a distinct whining noise from the engine bay, especially under acceleration, and a noticeable drop in power. I'm worried this is pointing to the dreaded turbocharger issues I've read about for the VR30DDTT engine.

Has anyone experienced similar problems with their 2018 Q50 Red Sport? What was the diagnosis and repair cost? I'm trying to figure out if this is a common reliability issue or just bad luck.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:10 AM

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ClearTheCode guidance (Infiniti · Buying & ownership)

Summary: For 2018 Q50 Red Sport Turbo Failure & Coolant Loss - Anyone Else?, work through these steps on your 2016+ vehicle:

  1. Confirm the symptom — note when it happens (cold start, highway, after fuel fill, etc.).
  2. Scan codes — save all pending/stored DTCs; don't clear until you've recorded them.
  3. Check TSBs & recalls — look up your VIN for open campaigns and known fixes.
  4. Inspect the obvious — related fuses, connectors, fluid level, and recent repairs.
  5. Test the common fix — follow model-specific service procedures; one change at a time.
  6. Escalate if needed — burning smell, no brakes, overheating, or stalling in traffic → shop visit.

Owner reported: My 2018 Infiniti Q50 Red Sport 400 with about 65,000 miles has been giving me headaches. I've noticed significant coolant loss, requiring me to top it off every few weeks. There are no visible leaks on my garage floor.

Recently, I've also heard a distinct whining noise from the engine bay, especially under acceleration, and a noticeable drop in power. I'm worried this is pointing to the dreaded t…

This is educational guidance, not a substitute for hands-on diagnosis.

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