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GENUINE MAZDA OEM Intake Solenoid for Mazda RX8 (Series 1 & 2, 2003-2012)

Restores precise vacuum control in the RX8 intake system with a factory-new solenoid of known condition and guaranteed OEM fit.

RX8 intake solenoid close-up showing black cylindrical body, bracket and upright vacuum port

Reviews from around the web

Independent reviews of this product gathered from other stores and owner communities.

Happy 8's day people! For you series 2 owners, here's the easiest way I found to change these little suckers. RX8 Upgrades providing the genuine goods as always. Remove the air box/ CAI, remove throttle body and remove the top part of the UIM only, this will get you easy access to the solenoids. Now you could remove them from this point, but removing the oil filler neck along with the vacuum chamber the solenoids mount to makes it FAR easier to change them. This whole job can be done in an afternoon for a mechanically minded person. On reassemble, don't forget to place the vacuum reference back onto the bottom of the manifold (has a green check valve) otherwise no valve will work. Reassemble and enjoy. PN is KL01-18-741 for those chasing the part

$100

The RX8 intake solenoid is a genuine Mazda replacement for the original intake-control valve found on every Renesis-engined car from 2003 to 2012. This valve governs vacuum switching in the intake system.

When it weakens or stops switching cleanly, intake behaviour and related sensor signals can become inconsistent. Fitting a genuine OEM Mazda RX8 intake solenoid restores the component to factory specification, with no uncertainty about wear history.

RX8 Intake Solenoid Key Features

  • Genuine Mazda OEM construction ensures the replacement matches the original valve’s switching behaviour, calibration and connector fitment exactly.
  • Suits all RX8 models from 2003 to 2012. It covers both Series 1 and Series 2 cars without any modification.
  • A new solenoid arrives with zero service history, removing the guesswork that comes with any used or unknown-condition valve.
  • The OEM solenoid is purpose-built for the Renesis intake-control circuit. It slots straight into the existing wiring and vacuum lines without adaptation.
  • Finally, genuine Mazda intake parts are sourcing well now but are worth buying when available. Production runs for older Renesis components do not last indefinitely.

For RX8 enthusiasts working through an intake fault, replacing a confirmed weak solenoid with a known-good OEM part makes diagnosis cleaner. The faulty variable is eliminated. Related signals from sensors further down the intake path then read against a properly functioning baseline.

Pair this solenoid with the GENUINE MAZDA OEM MAF Sensor when intake-related signal faults point to multiple components. Both are genuine parts that restore the system to a known factory state together.

Owners looking to buy an RX8 intake solenoid in Australia can also check Mazda Australia for manufacturer parts information.

Reviews from around the web

Independent reviews of this product gathered from other stores and owner communities.

Happy 8's day people! For you series 2 owners, here's the easiest way I found to change these little suckers. RX8 Upgrades providing the genuine goods as always. Remove the air box/ CAI, remove throttle body and remove the top part of the UIM only, this will get you easy access to the solenoids. Now you could remove them from this point, but removing the oil filler neck along with the vacuum chamber the solenoids mount to makes it FAR easier to change them. This whole job can be done in an afternoon for a mechanically minded person. On reassemble, don't forget to place the vacuum reference back onto the bottom of the manifold (has a green check valve) otherwise no valve will work. Reassemble and enjoy. PN is KL01-18-741 for those chasing the part

Additional information

RX8 Model

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SKU OM-ISV-S1S2 Categories , Types , Brand:

Related RX8 Upgrades

This intake solenoid is one of the best Mazda RX-8 upgrades you can make to your Series 1 (2003-2008) or Series 2 (2009-2012). Intake solenoid replacements are among the top OEM mods you can buy from MAZDA for owners who want better performance and reliability from their RX8. If you are looking for rx8 intake solenoid for sale in Brisbane (QLD), Sydney (NSW), Melbourne (VIC), Canberra (ACT), Adelaide (SA), Darwin (NT) or Perth (WA), you’ll find high-quality Japanese Engine upgrades at RX8 Upgrades.

Frequently Asked Questions

Does this intake solenoid fit both Series 1 and Series 2 RX8 models?

Yes. This genuine Mazda intake solenoid suits all RX8 models built from 2003 to 2012, covering both Series 1 (2003-2008) and Series 2 (2009-2012) cars.

What does the intake solenoid actually do on the RX8?

The intake solenoid controls vacuum operation within the RX8 intake system. When it ages or stops switching correctly, intake control is compromised, which can produce inconsistent throttle response or intake-related fault codes.

How do I know if my RX8 intake solenoid needs replacing?

A confirmed faulty solenoid typically shows up as a non-switching or stuck valve during diagnosis, often accompanied by intake-related fault codes or inconsistent intake behaviour. Replacement should follow confirmed diagnosis rather than be done speculatively.

Why buy a genuine Mazda solenoid rather than a used OEM one?

A used solenoid carries an unknown wear and service history, making it an unreliable baseline for fault-finding. A genuine new Mazda part arrives in known condition, so once fitted you can rule this component out with confidence when diagnosing broader intake issues.

Is this a difficult component to replace at home?

The intake solenoid is a targeted single-component replacement rather than a major strip-down, but the correct approach depends on how accessible it is in your specific car. If you are comfortable with RX8 intake-system work, it is a straightforward swap once the faulty valve is confirmed.

Are genuine Mazda OEM parts like this still available new?

This solenoid is currently available as a new genuine Mazda part. Genuine OEM components for the RX8 can become harder to source over time as production runs end, so sourcing new while stock exists is worthwhile.

What other intake components are worth checking at the same time?

While investigating intake solenoid faults, it is sensible to review the MAF sensor and the air filter, as these sit in the same intake circuit and can contribute to related symptoms. Addressing them together gives you a clean baseline after the repair.