I verified that the tire pressure monitoring system (TPMS) was capable of receiving updates of the new wheel sensors I bought from AliExpress. The only thing left to do was to mount the sensors inside the tires. Today I went to a tire shop, and they had a spot available to immediately mount the sensors inside the tires. Before I did that, I asked them to verify the sensors using their own testing tool, and they were able to confirm the identifiers with the identifiers I read using VCDS. They also stated that the battery was still good for at least 24 months, which I guess is the maximum time the device can report.

After mounting the sensors, I drove back home, and the sensors were automatically detected after a few kilometers of driving. The tires were inflated to 2.5 bar, which is the recommended pressure for ‘comfort’ driving. I inflated them to 2.8 bar, which is the recommended pressure for ‘normal’ driving.

Tire pressures as reported by the TPMS.
Tire pressures as reported by the TPMS.

The tire pressures flucuate a bit, depending on the temperature of the tires. When one side of the car is parked in the sun, the tire pressure tends to be a bit higher at that side. Based on this, it seems that the car correctly identified left and right, and probably also front and rear. The TPMS is now fully operational.

I still need to finalize the fuse box wiring, which I will do when I finalize the ambient lighting retrofit.

part 1 - part 2 - part 3 - part 4