
The Marquis Spa PCB MQBP21 INT. 2019 (Marquis part 600-6316) is a genuine replacement printed circuit board for Marquis spas, replacing the original PC Board MQBP21 REV R3B W/M-8 INT '19.
- Marquis Part Number: 600-6316
- Board: MQBP21 REV R3B W/M-8 INT '19
- Brand: Balboa
- OEM Fit: Marquis Spas
- Type: PCB (Circuit Board)
- Genuine like-for-like replacement restores full spa pack function
- Precision-matched revision avoids compatibility issues
- Direct fit — no wiring modifications required
This board must not be fitted to any other device or model. Installation should be carried out by an experienced tradesman or competent individual, as incorrect installation could damage the board and invalidate the warranty. Once the sealed packet is opened, this product cannot be returned.
For delivery timelines and options, see our Shipping & Delivery page. Please note this item is non-returnable once opened — see our Returns & Refund Policy page for full details.