CARFIX

Mitsubishi Sigma 4G54 Sedan 83kW (1985–1987)

Welcome to the CARFIX Vehicle Wiki for the MITSUBISHI SIGMA Base. This guide provides owners with helpful information regarding maintenance, common problems, and general ownership insights. The Sigma was a popular choice for families and company fleets in New Zealand, favoured for its comfort and reliability.

Parts for the Mitsubishi Sigma 4G54 Sedan 83kW

Known issues

*Automatic transmission issues (slipping, harsh shifting) can occur, typically around 150,000-250,000 km. Regular fluid changes can help mitigate these problems.
*Rust in sills and wheel arches is a known weakness, particularly as the vehicle ages. Regular inspection and rust treatment are recommended.
*Camshaft wear, especially in earlier models, is something to be aware of. Listen for unusual engine noises, which may indicate wear.

WOF tips

When preparing your MITSUBISHI SIGMA Base for its Warrant of Fitness (WOF) inspection, pay particular attention to:
• Rust around the windscreen and rear window seals.
• Corrosion in the rear suspension mounting points. These are common areas of concern and can lead to WOF failure if not addressed.

About the Mitsubishi Sigma 4G54 Sedan 83kW

As a reliable and comfortable vehicle popular in New Zealand, the MITSUBISHI SIGMA Base offered a practical solution for many families and businesses. While it may lack a significant motorsport or engineering legacy, its everyday usability made it a common sight on New Zealand roads.

Regular maintenance is key to keeping your Sigma running smoothly. Consider these points:
• Engine Care: Regular oil and filter changes are essential. Also, be mindful of the condition of the drive belt alternator to ensure proper charging.
• Transmission Health: Pay attention to the automatic transmission fluid level and condition. The automatic transmission filter should also be replaced at recommended intervals.
• Steering and Suspension: The steering sector shaft oil seal and front outer wheel bearings are components to inspect for wear and potential replacement. Keeping on top of these issues will ensure a safe and comfortable driving experience.
• Drivetrain Maintenance: Check the condition of the universal joint/coupling front. Axle gear oil should be changed according to the maintenance schedule for optimal performance.

When servicing, tasks may include replacing the reverse lamp switch, cylinder head bolt, cylinder head, conversion gasket set, and sealing ring input shaft as needed. The fan clutch plays a crucial role in keeping the engine cool, so inspect its functionality regularly, especially during warmer months. Also consider the oil seal transmission/gearbox output rear extension when performing transmission work.

Questions owners ask

What are the common rust spots I should check on my 1985-1987 MITSUBISHI SIGMA before a WOF in New Zealand?
When preparing your MITSUBISHI SIGMA Base for its Warrant of Fitness (WOF) inspection, pay particular attention to rust around the windscreen and rear window seals, as well as corrosion in the rear suspension mounting points. These are common areas of concern and can lead to WOF failure if not addressed.
My MITSUBISHI SIGMA's automatic transmission feels like it's slipping. Is this a common issue for the 1985-1987 model?
Yes, automatic transmission issues such as slipping or harsh shifting can occur in the MITSUBISHI SIGMA, typically around 150,000-250,000 km. Regular automatic transmission fluid changes can help mitigate these problems and extend the life of your transmission. You should also check the automatic transmission filter.
Where can I get a replacement steering sector shaft oil seal for my 1985-1987 MITSUBISHI SIGMA in NZ?
CARFIX stocks 336 SKUs for the MITSUBISHI SIGMA 1985–1987, and it's highly likely they will have the steering sector shaft oil seal you need. You can check their website or contact them directly for availability.
What maintenance should I perform to prevent camshaft wear in my MITSUBISHI SIGMA?
Camshaft wear, especially in earlier models of the MITSUBISHI SIGMA, is something to be aware of. While regular oil and filter changes are crucial for overall engine health, listening for unusual engine noises can be an early indicator of wear. Addressing these promptly can help prevent further damage.
How often should I change the engine oil and filter in my 1985-1987 MITSUBISHI SIGMA?
The recommended service interval for your MITSUBISHI SIGMA is 10,000 km. Regular oil and filter changes are essential for engine care and will help keep your vehicle running smoothly.
What should I check on my MITSUBISHI SIGMA's cooling system, especially in warmer weather?
The fan clutch plays a crucial role in keeping the engine cool. You should inspect its functionality regularly, especially during warmer months, to ensure it's operating correctly and preventing your engine from overheating.