PRHT slow, stuck or rattling after an aftermarket roof module
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What causes "PRHT slow, stuck or rattling after an aftermarket roof module" on the Mazda Miata NC (2006-2015 US model years), and how is it fixed?
Mazda says aftermarket modules that let the roof run while moving can overstress the motors and linkages. Fix: Remove the aftermarket module.
Symptoms
The hardtop is slow, will not open or close, or the linkage rattles.
Cause
Mazda says aftermarket modules that let the roof run while moving can overstress the motors and linkages.
Fix (summary)
Remove the aftermarket module. Mazda's tip says motor replacement or linkage adjustment is not covered by warranty on a modified car.
Related build entries
Other NC problems
- Recall 06V-103: driver airbag horn-assembly bolt (early 2006 cars)
- Plastic coolant expansion tank cracks and dumps coolant
- Plugged soft-top drains put water in the footwells (2006-2009 TSB)
- PRHT crunches or is hard to open (2007 TSB 09-038/07)
- PRHT windshield header and roof rattle (2007-2008 TSB 09-035/08)
- PRHT front roof panel contacts the deck when open (2007 TSB 09-035/07)
More for this car
- All Mazda Miata NC (2006-2015 US model years) fitment answers · NC common problems
- Newsletter archive: past issues with every new and corrected entry
Sources
- Mazda M-Tip: 2008-2013 MX-5 power retractable hardtop slow, won't open or rattles (2012) — Mazda North American Operations (M-Tip technician tip) (mfr spec; read 2026-10-26; full page read)
Summaries are in our own words. Not repair instructions; consult the factory service manual.
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