2004 Mazda RX-8 2.6L Petrol · AJ54 AAZ

A pattern of corrosion-related advisories, particularly concentrated around the front subframe, brake pipes, and inner sills, defines the mechanical picture for this 2004 Mazda RX-8. The most recent test on 2026-02-02 was a pass, but the advisory list reveals early-stage structural and braking component concerns that warrant close attention. The front subframe has been flagged as corroded, though without a significant reduction in structural rigidity at this stage, and the inner sills are noted as corroding. Brake pipes at the front are also flagged as corroded, though the presence of grease or covering material can mask the underlying surface condition. A slightly damaged or perished front tyre and minor headlamp lens defects on both sides round out the advisory list. Taken together, these items point to a vehicle where corrosion is beginning to take hold in multiple structural and safety-critical locations, even though no component has yet crossed the threshold into a fail. At 73,871 recorded miles over approximately 22 years, annual mileage averages around 3,358 miles, which is low for a vehicle of this age. Such limited use can mean reduced wear on high-mileage components like the engine internals and clutch, but it also brings specific risks. Vehicles that see only light use often suffer from seized brake calipers, dried-out suspension bushes, perished rubber seals, and flat-spotted tyres, and the corrosion pattern visible on this car is consistent with a vehicle that has spent extended periods stationary or used only in short, stop-start journeys where moisture does not get burned off. RX-8s in particular are known for being sensitive to infrequent use, as the Renesis rotary engine benefits from regular running to keep the apex seals lubricated and the combustion chambers free of carbon and moisture accumulation. Any prospective buyer should be alert to the possibility that low recorded mileage reflects periods off the road rather than gentle use. Given the corrosion advisories already recorded, a physical inspection should focus on the underside of the vehicle, particularly the front subframe mounting points, inner and outer sills, and the full length of the brake and fuel lines. Any flaking paint, bubbling under the surface, or white oxidation residue on the subframe would suggest the corrosion is more advanced than the advisory description implies. The brake pipes at the front should be examined for pitting or scaling where the grease has been wiped away, and a spanner check of the pipe unions is advisable, as corroded threads can snap during servicing. On the road, listen for any clonks or knocks from the front suspension over uneven surfaces, which could indicate corroded bush housings or weakened subframe mounting points rather than simply worn bushes. A test drive should also include several firm brake applications from speed to check for pull to one side, which would point to a seized caliper or uneven pad wear, and the pedal feel should be assessed for any sponginess that might indicate compromised brake lines. The steering should be checked for vagueness or knocking over bumps, which on a car of this age could indicate worn tie rod ends, corroded mounting points, or failing suspension bushes. Given the RX-8's rotary engine, particular attention should be paid to cold-start behaviour, idle quality, and the presence of any blue smoke from the exhaust on start-up or under load, as well as checking the engine bay and undertray for signs of oil residue around the apex seal corners and the cooling system. The MOT record alone cannot confirm mechanical integrity, but the corrosion pattern it reveals makes a thorough pre-purchase inspection by a specialist familiar with this model strongly advisable.