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For anyone interested, I changed the wheels on my 2016 SZ3 for wheels from a GEN5 Jimny. I let it stand for 30 mins to make sure nothing was transmitting. I changed the front wheels first. The new TPMS sensors worked straight away with no need to drive. I drove for a while to make sure all was working. I let it stand again for 30 mins and changed the back wheels. Same result, the new TPMS sensors worked straight away. All working fine with no issues.
As an aside, the new higher profile tyres seems to absorb bumps better. Virtually no change to speedometer reading, no need to recalibrate. About 2mph at 40mph judging by a local speed sign. It is actually more accurate now.
A Jimny re-learns the TPMS sensors every time it’s switch off for more than 30 minutes, so usually there is no problem.
However, to learn which is which it needs to be driven at a constant speed on a straight road for a couple of minutes.
You can use this calculator to work out the difference in diameter (and hence circumference) and how the speedo will change.
tiresize.com/tyre-size-calculator/
I check my speedo against a GPS. Jimny’s speedos over read by around 5 - 10%, so if you go up in tyre size, they are usually over-reading by 0 - 5%.
A speed sign is not calibrated and their accuracy is often not very good. If you don’t have a GPS download an app on your phone, but be warned GPS often under-reads unless you are on a straight flat road and at a constant speed.
2020 blue SZ5 (one of the last to be registered in the UK)
Ex 2011 Blue Jimny SZ4
Northumberland Jimny Blog
For anyone interested, I changed the wheels on my 2016 SZ3 for wheels from a GEN5 edit:Gen4 Jimny. [...] The new TPMS sensors worked straight away with no need to drive.
Good info, thanks. We have had the question here a couple of times about whether the sensors are the same between generations/model years. Suzuki provides many different part numbers for what appear to be the same TPM sensor units, used for many years of the Jimny and other models as well.
A Jimny re-learns the TPMS sensors every time it’s switch off for more than 30 minutes, so usually there is no problem.
However, to learn which is which it needs to be driven at a constant speed on a straight road for a couple of minutes.
Quite right about the relearn being automatic - no need to "reprogram" the Jimny when changing wheels/sensors. Many people get told something different by their dealer technician...!
Small quibble about how the TPMS determines wheel position. The TPMS antenna on the Jimny (and most every car) is placed aft of the rear axle and offset to one side. This places each wheel at a different distance from the antenna unit, which then allows the antenna unit to use the differences in signal gain to correlate the individual sensors with wheel position. Simple and works pretty well. Driving the car activates the sensors by a centrifugal switch inside each one typically -- spinning the wheels wakes them up, so to speak -- which also explains why the Jimny does not get confused by the sensor in the spare tyre.
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