Parts for your 2007 Mazda 3-Throttle position sensors

2007 Mazda 3 Throttle Position Sensor (TPS)

Yes, a throttle position sensor is used on the 2007 Mazda 3. Mazda’s factory workshop literature for the BK-series Mazda 3 (2004–2009) details an electronic throttle body that includes a dual-track throttle position (TP) sensor, and the wiring diagrams show dedicated TP sensor circuits alongside the accelerator pedal position (APP) sensor. Common Mazda 3 diagnostic routines also reference TP-related fault codes (P0121–P0123, P0221–P0223, P2135), confirming the TPS is fitted and monitored by the PCM.

The TPS on a 2007 Mazda 3 is part of the electronic throttle body and works with the throttle actuator motor to tell the engine computer exactly how far the throttle plate has opened. By tracking that angle in real time, the PCM can deliver the right amount of fuel, manage ignition timing, and keep idle smooth. It also keeps cruise control and traction systems behaving properly. Even though the car runs a drive-by-wire setup, it still relies on a TPS inside the throttle body as a feedback device, while the APP sensor on the pedal tells the system what the driver wants.

As part of routine servicing, it’s smart to keep an eye on the TPS and throttle body. Many 2007 Mazda 3 units have the TPS integrated into the throttle body, depending on the part supplier, the sensor may not be sold separately. If the TPS fails or tracks become noisy, expect rough idle, flat spots, poor fuel economy, or a lit MIL with TP-related codes. Before calling time on the sensor, check the basics: clean the throttle bore and plate with throttle-safe cleaner, inspect the connector for corrosion or spread terminals, and verify ground and 5 V reference with a multimeter. If replacement is required, use a quality unit, fit a new gasket if the body is removed, and ensure the electrical connector locks positively.

• After repair or cleaning, perform a throttle/idle relearn. A scan tool is best, but the PCM will often relearn after a short warm-up and mixed driving cycle.
• Avoid forcing the throttle plate by hand, it can upset the calibration.
• If symptoms persist, confirm APP sensor data matches TPS data—disagreement often triggers P2135.

With the right diagnosis and a bit of care, the TPS on a 2007 Mazda 3 rarely needs frequent replacement, but when it does play up, sorting it quickly pays off in smoother running and better economy.

Does the 2007 Mazda 3 use a TPS or only a drive-by-wire pedal?

It uses both. The accelerator pedal has an APP sensor to detect driver demand, and the throttle body contains a TPS to report actual throttle plate position to the PCM. The two signals are cross-checked for safety and accuracy.

Can the TPS be replaced separately from the throttle body?

On many 2007 Mazda 3 units, the TPS is integrated into the throttle body and isn’t offered as a separate OEM service part. Some aftermarket options sell a stand-alone sensor, but availability varies. If the sensor isn’t serviceable, the complete throttle body is replaced.

How do you reset or relearn the throttle after TPS/throttle body work?

The most reliable method is with a scan tool performing an idle/throttle relearn. Without a tool, warm the engine fully, let it idle for several minutes with all accessories off, then drive at mixed speeds so the PCM can adapt. If idle hunts or codes return, perform a proper relearn with a scan tool and recheck for wiring or air leaks.