I called my local Merityre today (as they're about half a mile from my house) as I think my wheels need balancing (I've got a slight vibration at over 50 mph) and whilst on their website I noticed that they bill themselves as TPMS specialists.

See here - http://www.merityre.co.uk/tyre-pressure-monitoring-system.htm

My TPMS (like everyone else's I believe!) is a bit hit and miss - the light flashes up and I get the "check all tyres" message a couple of times every day - then it all goes away, then it pops up again.

Am thinking about getting these guys to take a look. They can't be any worse than a main dealer (who aren't specialists) and certainly won't be as pricey.

Has anyone used them to check their TPMS or am I going to be a guinea pig?  Past (too many to list, but a few favs)...
2007 Porsche 997 C2S Coupe
2007 FFRR 4.2 S/C
2012 Jag XKR 5.0 S/C
2014 Merc SL500 AMG 4.7 V8 BiTurbo (remapped to 560BHP)
2011 FFRR 4.4 TDV8 Vogue SE - Overfinch Conversion
2012 Porsche Cayenne Turbo
2018 AMG C63S Estate
2015 Mercedes GLE63S
2017 Maserati Levante Diesel
2017 Audi A6 Avant 3.0 Black Edition