Gray water tank sensors corrode and read wrong, so your Sprinter shows a full tank when it is empty. We remove the fouled sensor, clean the tank contacts, and fit a reliable sensor or external monitor so your Riverside camper reports gray levels you can trust.
What this service includes
- Confirm the gauge fault with a known tank level
- Remove the fouled sensor and clean the tank contacts
- Fit a new internal sensor or external monitor
- Verify the gauge tracks empty, mid, and full correctly
Signs your Sprinter needs it
- The gray gauge reads full when the tank is empty
- Readings jump around or stay frozen on one level
- The sensor contacts are corroded or coated
What does gray water tank sensor replacement cost?
Ballpark pricing for gray water tank sensor replacement on a Sprinter runs $250 to $1,200. The final number depends on your model, mileage, and the exact cause, which we confirm with Xentry before any work is authorized. Diagnostic time is credited toward the repair. See the full pricing page.
Frequently asked questions
Why does my gray tank always read full?
Residue and corrosion bridge the internal sensor contacts, so it reports full. Cleaning the contacts or switching to an external monitor gives an accurate read again.
Are external tank monitors better for a Riverside camper?
Often yes. External sensors read through the tank wall and avoid the fouling that plagues internal probes, so many owners switch when the original fails.