Your cart

GENUINE MAZDA OEM Renesis Short Motor for Mazda RX8 (Series 1, 2003-2008)

Zero-kilometre RX8 Renesis short motor for Series 1 engine replacement, sourced direct from Mazda’s production line in Japan.

RX8 Renesis short motor with exposed flywheel resting in a cardboard box

$13,000

The RX8 Renesis short motor is a brand-new, genuine Mazda assembly built specifically for Series 1 engine replacement. It is the correct foundation for any owner dealing with a worn, flooded, or seized engine. Every critical rotating component arrives at zero kilometres, never run, straight from Mazda’s own production line in Japan.

RX8 Renesis Short Motor Key Features

  • Complete rotating assembly includes rotors, side and apex seals, eccentric shaft, and rotor housings, all factory-new and never run.
  • The oil pan, oil level sensor, water pump, spark plugs, and flywheel are included with the unit, giving the rebuild a solid component baseline before sourcing ancillaries.
  • This is a genuine zero-kilometre Mazda unit, not a remanufactured or rebuilt item. Every replacement starts from a confirmed new-part condition with no uncertainty about internal wear.
  • Built in Japan to Mazda factory tolerances, this Renesis short motor delivers OEM assembly quality to the new engine installation. No reliance on workshop rebuilds of unknown standard.
  • Finally, Series 1 fitment covers the 2003-2008 application precisely, making it the correct choice when sourcing a genuine Mazda RX8 engine for the earlier generation.

For RX8 enthusiasts, fitting this assembly means the engine’s new life begins with every critical internal at zero kilometres. Seal wear, rotor condition, and shaft straightness are known quantities, certainty that simply is not available with a used or rebuilt Renesis short motor.

A fresh short motor deserves a clean supporting system from day one. Pair it with the GREDDY TRUST Oil Filter to keep the new oil circuit clean from the first start. The R-MAGIC Super High Flow Water Pump steps up coolant circulation right from initial warm-up.

While the engine is out, replace the GENUINE MAZDA OEM MAF Sensor to ensure accurate air-mass readings from the outset. It is also a good time to fit the GENUINE MAZDA OEM Waterpump/Alternator and Airconditioning V-Belt Kit, replacing items that rarely get attention during routine servicing. Learn more about Mazda’s engineering standards at the Mazda official site.

Additional information

RX8 Model

SKU OM-MOT-S1 Category Types , , Brand:

Related RX8 Upgrades

This renesis short motor is one of the best Mazda RX-8 upgrades you can make to your Series 1 (2003-2008). Engine short block upgrades 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 renesis short motor 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

What components are included with the RX8 Renesis short motor?

The Renesis short motor includes the core rotating assembly - rotors, side and apex seals, eccentric shaft and rotor housings - plus the oil pan, oil level sensor, water pump, spark plugs and flywheel. Items such as the intake, exhaust manifold and ancillary sensors are not included and will need to be sourced separately or transferred from the original engine.

Is this a remanufactured or rebuilt engine, or is it brand new?

This is a genuine zero-kilometre Mazda unit built on Mazda's own production line in Japan. It is not a remanufactured, rebuilt or reconditioned assembly. Every internal component arrives new and never run, giving you a confirmed factory-condition starting point for the replacement.

Which RX8 series and years does this short motor fit?

This short motor is the correct fitment for Series 1 RX8 models covering the 2003 to 2008 model years. If your RX8 is a Series 2 (2009 onwards), this is not the right unit - a separate Series 2 assembly is required.

Why would I choose a genuine Mazda short motor over having my existing engine rebuilt?

A workshop rebuild relies on the condition of your existing rotors, seals and eccentric shaft, which may be worn, scored or warped beyond what a visual inspection reveals. A genuine Mazda short motor eliminates that uncertainty entirely - every critical internal starts at zero kilometres to factory tolerances, with no dependence on the quality of the rebuilder or the history of the original components.

Does this short motor come with apex seals already fitted?

Yes. The apex seals, side seals, rotors, eccentric shaft and rotor housings are all part of the factory-assembled core rotating assembly included with the unit. They arrive fitted and new, built to Mazda's production tolerances.

Will I need to tune or recalibrate anything after fitting this short motor?

Because this is a genuine OEM Mazda assembly built to the original Series 1 specification, it does not require any ECU remap or recalibration on a standard, unmodified vehicle. If your RX8 carries existing performance modifications, consult your tuner about whether those maps remain appropriate for the new engine.

What other parts should I replace or inspect while the engine is out?

With the engine removed it is an ideal time to inspect wear items that are otherwise difficult to access. The MAF sensor, oil filter and cooling system components - including the water pump - are worth addressing before the new short motor goes in, since fitting fresh internals to a neglected cooling or oil circuit can shorten the new engine's service life.