Buying a used Eunos/Mazda 30X Coupe (1992-97)

Mazda launched the 323-based baby MX-3 coupe late in 1992 with a unique 1.8-litre quad-cam version of the V6 seen in later 323 Astina models. Almost rotary smooth and peaky with 99kW/6400rpm and 159Nm/4500 rpm, this tiny V6 rewarded good driving despite its front-drive layout.

At only 1145kg, it was closer in size to Toyota's forgettable Paseo but was sweeter than the larger Celica hence its premium Eunos 30X badging as an immediate reward for those dealers who had invested in Eunos showrooms.

The $33,250 launch model was upgraded as the Leather version early in 1994 as exchange rates and luxury tax sent new prices soaring by $10,000.

Later in 1994, it was joined by a stripped-out Sport model before both models became part of the mainstream Mazda range from September 1996. 

Prices
The first 30X in average condition has dropped below $7000 but the later Leather/Luxury models will top $10,000 then peak below $14,000.

The stripper Sport version which continued into 1997 can provide a cheaper, newer example starting from $7500 but air-conditioning, sunroof and CD player were not standard. Remember to search Eunos and Mazda ad listings.

Checkpoints 
The normally reliable 30X is now facing age-related items. Like most Mazdas from this era, the integrated distributor and electronics get too hot and fail for a $1000 replacement bill. Aftermarket repairers can now split them and replace the failed parts for much less than that.

Although tiny, the all-aluminium 1.8-litre V6 is as complex as a Ferrari with 24 valves, four camshafts and fine oil galleries so it won't tolerate skipped oil changes or cheap oil. Sludged oil galleries starve the camshafts of oil which can then seize and destroy the heads at huge cost.

Cylinder head closest to front is first to fail from oil starvation as it's furthest from oil pump so listen for early warning signs such as clattery valve gear or noisy lifters from not getting enough oil pressure.

Walk away if there is no evidence of oil and filter changes every 5-10,000km with reputable oil and filter. Likewise, high quality coolant and regular cooling system flushes are critical with so much aluminium.

Plastic and aluminium radiators are now failing as the plastic crazes and seals harden from heat and age. They must be replaced before they drop their coolant.  Check all hoses and fittings as engine doesn't tolerate being cooked from failed cooling system.

Can belt is important 100,000km maintenance item as valves and pistons can collide if it breaks while being revved. Water pump driven by cam belt usually fails at 120,000km for repeat labour bill so best replaced at each belt change.

Mazda autos from this era fail at 120-150,000km especially this one when tiny engine forces it to work. It can cost upwards of $3000 to overhaul. Check for delayed engagement, flared changes, shift shock and indecisive overdrive engagement. Manual version is much cheaper long term and sweeter to drive.

Driver's side power window switch is a routine replacement item. Leather trim can already require expensive replacement or repairs if neglected. Check all exterior lights for cracks and fading and make sure bumpers have original gloss finish. Parts supply from used Japanese MX-3 models should now cut most parts costs.