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2018 A4 B9 S-Tronic Transmission Fluid Change Interval & DIY

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Mike T. · rep 0 · May 22, 4:29 AM · 1 replies · solved · Question

Hey everyone, I have a 2018 Audi A4 B9 with the S-Tronic (DSG) transmission, and I'm approaching 60,000 miles. I've heard conflicting information about when the transmission fluid should be changed. Some say 40k, others 60k, and some even longer.

What's the recommended interval for the S-Tronic fluid and filter on this specific model year? Is this something a competent DIYer can tackle at home, or is it best left to a specialist? I've done oil changes and brake jobs before, but a transmission service feels a bit more involved.

Also, what specific fluid type and filter kit should I be looking for? Any special tools required, like a VCDS for temperature monitoring or filling? I want to make sure I do this right to keep my transmission healthy.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 4:29 AM

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ClearTheCode guidance (Audi · Maintenance & DIY)

Summary: For 2018 A4 B9 S-Tronic Transmission Fluid Change Interval & DIY, 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: Hey everyone, I have a 2018 Audi A4 B9 with the S-Tronic (DSG) transmission, and I'm approaching 60,000 miles. I've heard conflicting information about when the transmission fluid should be changed. Some say 40k, others 60k, and some even longer.

What's the recommended interval for the S-Tronic fluid and filter on this specific model year? Is this something a competent DIYer can tackle at home, o…

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

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