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Buying guide

Mazda RX-8 SE3P (2003 to 2012): buying guide, problems and NZ numbers

The Mazda RX-8 SE3P was built from 2003 to 2012 as a coupe, with a manual or automatic gearbox, rear wheel drive and petrol power. Chassis code: SE3P. Redline has a curated guide to its 7 most reported weak points, from owner club and specialist sources.

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Key facts

Years
2003 to 2012
Chassis codes
SE3P
Body types
Coupe
Gearboxes
Manual, Automatic
Drive
RWD (rear wheel drive)
Fuel
Petrol

On NZ roads

Counting every one on the NZ register. The first look can take up to 15 seconds.

Known weak points

Curated by Redline from owner club and specialist sources Commonly reported by owners and specialists for the Mazda RX-8 (2003 to 2012). Not every car has these; check this one.

  1. Rotor tip wear and compression

    Rotor tips must be kept lubricated, and a compression test by a rotary specialist shows whether the engine is worn. Equal compression on both rotors is a good sign.

    Where to look
    The engine, and a rotary compression test printout
    How to test
    Ask for a rotary compression test before buying. Poor starting when warm can point to wear.
    Cost if it needs fixing
    High cost engine rebuild

    Sources: pistonheads.com (opens in a new tab), fastcar.co.uk (opens in a new tab)

  2. Coil packs and plugs

    The coil packs must be replaced about every 30,000 miles. Weak ones cause poor hot starting and lost power.

    Where to look
    The 4 coil packs on top of the engine, and their invoices
    How to test
    Ask when the coils and plugs were last done. Start the car hot after the drive and check it fires straight away.
    Cost if it needs fixing
    Medium cost a set of coils

    Sources: pistonheads.com (opens in a new tab)

  3. Cold start flooding

    Switching off before the engine is warm can flood it and make it hard to restart. Fuel dumped into the catalytic converter shortens its life.

    Where to look
    The catalytic converter and starting behaviour
    How to test
    Ask how the car has been used. A car that struggles to restart after a short run may have been flooded.
    Cost if it needs fixing
    High cost a new catalytic converter

    Sources: pistonheads.com (opens in a new tab)

  4. Oil use

    The engine uses oil by design, so the oil level needs regular checks.

    Where to look
    The dipstick, and oil top up habits
    How to test
    Check the level and ask how often it is topped up and with what oil.
    Cost if it needs fixing
    Low cost oil is cheap; running low is not

    Sources: pistonheads.com (opens in a new tab), fastcar.co.uk (opens in a new tab)

  5. Secondary shutter valve

    A broken secondary shutter valve in the inlet manifold causes a lack of power and a ticking noise.

    Where to look
    The inlet manifold on top of the engine
    How to test
    Listen for ticking from the engine bay and feel for flat performance at high revs.
    Cost if it needs fixing
    Medium cost valve repair

    Sources: pistonheads.com (opens in a new tab)

  6. Front oil pipes, radiators and sump rust

    The front oil pipes can rust from water coming through the wheel arch liners, and the oil cooler and air conditioning radiators in the front bumper rust. Mazda issued new pipes and liners.

    Where to look
    The oil cooler lines behind the front bumper, the radiators in the front bumper and the sump
    How to test
    Look behind the front bumper with a torch for rusty pipes and radiators. Ask whether the pipe campaign was done.
    Cost if it needs fixing
    Medium cost pipes and radiators

    Sources: pistonheads.com (opens in a new tab)

  7. Clutch and heat shield

    Clutches typically need replacing about every 30,000 miles, and the dynamic damper heat insulator can crack or fall off; a recall replaced faulty ones.

    Where to look
    The clutch pedal and the heat shield under the car
    How to test
    Feel for clutch slip and listen for rattles underneath.
    Cost if it needs fixing
    Medium cost clutch replacement

    Sources: pistonheads.com (opens in a new tab)

General guidance from owner and specialist sources. Check the specific car with an independent inspection. Researched 1 November 2026.

What the cost bands mean
  • Low: a small job. Typically a few hundred dollars or less at an NZ workshop, often a DIY fix.
  • Medium: a proper workshop job. Typically several hundred to a couple of thousand dollars.
  • High: a major job. Typically several thousand dollars or more, enough to change what the car is worth.

Service items

Questions to ask the seller

  • Has a rotary compression test been done recently, and can I see it?
  • When were the coil packs and plugs last done?
  • Has it ever flooded or failed to restart?
  • Has the front oil pipe campaign or the heat shield recall been done?
  • What oil do you use and how often do you top it up?

New Zealand notes

  • NZ has NZ new and Japanese import RX-8s. Rotary specialists in NZ can do the compression test before you buy.

An RX-8 suits an enthusiast who wants a rotary and accepts frequent oil checks and specialist care.

US recalls

Looking up US recall data.

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