How to Tell If Your Tesla Uses Bluetooth or 433MHz TPMS (By Year and Model)

Few parts on a Tesla cause more wasted money than the wrong tire pressure sensor. The car uses two completely different TPMS generations — an older 433MHz radio system and a newer 2.4GHz Bluetooth Low Energy (BLE) system — and they look almost identical once fitted. Order the wrong one and you get a sensor that physically bolts in perfectly and then never reports a pressure.

This guide is written from the parts side of the counter: what we check before quoting a Tesla sensor, which checks are reliable and which ones mislead people, and the exact cut-off points by model and year.

1. The Short Answer: Which System Your Tesla Has

Tesla did not switch the whole range at once. The change rolled out model by model over roughly twelve months, which is why two cars sold in the same year can use different sensors.

Two cautions about that table. First, the boundary is a build date, not a model year: a car registered as a 2021 model can have been built before the switch. Second, refreshed Model S and Model X started later than Model 3 and Model Y, so a 2021 Model S is not automatically a Bluetooth car.

2. Why the Two Systems Cannot Be Swapped

The difference is not a firmware setting. A 433MHz sensor contains a radio transmitter that broadcasts on a fixed UHF frequency; a Bluetooth sensor runs a 2.4GHz Low Energy stack that pairs with the vehicle. The receiver in the car is matched to one of them. No programming tool can convert one into the other, and no amount of relearning will make a 433MHz sensor appear on a Bluetooth car.

This matters commercially as well: a workshop that stocks only one generation will turn away roughly half of the Teslas that drive in, and a distributor who mixes the two in one bin creates warranty claims that are impossible to disprove later.

3. Check One: Read the Part Number Off the Old Sensor

This is the most reliable check available to a workshop, and it takes two minutes. The number is laser-etched or printed on the sensor body, usually on the flat face that sits against the rim.

The current Bluetooth family sold for Tesla applications carries numbers in these ranges:

• 1490701-01-B and 1490701-01-C — the most common Bluetooth numbers for Model 3 and Model Y applications
• 1490750-01-A and 1490750-00-A — the same Bluetooth generation, different revision batch
• 149070101B — the same part written without dashes, which is how it often appears on invoices

If the number on the sensor starts with a different sequence entirely, you are almost certainly looking at the earlier 433MHz generation. Do not guess from memory: photograph the number before the old sensor goes in the scrap bin, because the replacement decision depends on it.

4. Check Two: Scan the Car With a TPMS Tool

A tool that supports both protocols will identify the system in seconds, and this is the check we recommend to any shop doing Tesla work regularly. The logic is simple: if the tool triggers and reads pressure from all four wheels, the car is on the frequency the tool supports. If the tool reports no signal while the dashboard is showing live pressures, the car is on the other protocol.

Two practical notes from the bench. First, the sensor only wakes on motion or a low-frequency trigger, so scan with the tool antenna 20–30cm from the valve rather than pressed against it. Second, a tool that scans only 315/433MHz will stay silent on a Bluetooth car — silence is a result, not a fault.

5. Check Three: Ask Tesla With Your VIN

When the car is present and the sensor number is unreadable, the VIN is the definitive answer. Tesla service can confirm the original part number, and the same VIN lookup settles warranty questions on cars that sit right at the production boundary.

For distributors shipping overseas, this is also the cleanest way to protect a claim: keep the VIN or the photographed sensor number on the order record. If a customer later reports a non-working sensor, the record shows whether the right generation was ordered.

6. What Happens If You Fit the Wrong Type

The symptoms are consistent and worth memorising, because they are frequently misdiagnosed as a faulty new sensor:

• The wheel position shows a dash or blank instead of a pressure value
• A "TPMS unavailable" or tyre-pressure warning that returns after clearing
• Three wheels report correctly and one does not — typical of one wrong-generation sensor in a set of four
• Pressures appear only after a long drive, or never appear at all

If the pattern is one wheel out of four, stop troubleshooting the tool and check the generation of that single sensor first. In our experience this accounts for a large share of "bad out of the box" returns.

7. For Shops and Distributors: Stocking Both Generations

Tesla's parc now spans both generations in most markets, so the practical answer for a workshop is to stock both and label the bins by build date, not by model year. For distributors, three habits reduce returns more than any sales tactic:

• Test one sensor from every batch on a known Bluetooth car and a known 433MHz car before shipping
• Record the VIN or the original part number on every Tesla order
• Keep the Bluetooth and 433MHz stock in physically separate bins with the cut-off dates printed on the label

It is also worth telling retail customers plainly which system their car uses at the point of sale. Buyers increasingly search the part number before they call, and a supplier who confirms the generation in the first reply wins the order.

8. The Bottom Line

Three facts solve almost every Tesla TPMS identification question: the build date decides the generation, the part number confirms it, and the two generations never interchange. Model 3 built from October 2020, every Model Y, and refreshed Model S and Model X run Bluetooth; everything earlier runs 433MHz.

If you are ordering in volume, confirm by VIN and photograph the old sensor. It is a two-minute habit that prevents the most common and most expensive mistake in Tesla tyre work.

Last updated: 3 November 2026. Reviewed against current production part numbers.