Parts for your 2017 Mitsubishi Eclipse cross-Drive belt tensioner

2017 Mitsubishi Eclipse Cross drive-belt tensioner

Yes, the 2017 Mitsubishi Eclipse Cross uses a drive-belt (serpentine) automatic tensioner. This is supported by technical sources: the Mitsubishi Motors Service Manual for Eclipse Cross (GK/GL, first issued 2017) under Engine Mechanical/Drive Belt details an “auto-tensioner”, the Mitsubishi ASA global parts catalogue lists an “auto-tensioner, drive belt” for GK1W/GK9W models, and reputable aftermarket catalogues from Gates and Dayco in Australia/New Zealand specify an accessory-belt automatic tensioner for the 1.5L MIVEC turbo petrol and the 2.2L diesel variants.

On the Eclipse Cross, the drive-belt tensioner keeps the serpentine belt at the right tension so the alternator, air-conditioning compressor and, on some variants or markets, other belt-driven accessories run smoothly. Because it’s spring-loaded and damped, it automatically compensates for belt wear and engine load changes—there’s no manual adjustment screw to tweak.

As part of routine servicing, it’s smart to give the tensioner the same attention as the belt. Under the bonnet, with the engine off, a tech will check pulley alignment, spin the tensioner pulley for roughness, and watch for the arm sitting off-angle or jittering at idle (a sign the internal spring or damper is tired). Any oil or coolant contamination on the belt or pulley is a red flag too.

• Common symptoms of a tired tensioner: brief cold-start squeal, chirping at idle, belt flutter, visible pulley wobble, or charging/A/C performance complaints.
• Inspection rhythm: at every service (or at least every 15,000–20,000 km/12 months).
• Replacement timing: often at the first or second belt change—many workshops see good results replacing the belt, tensioner and idler as a kit around 100,000–150,000 km, or earlier if there’s noise or misalignment.

When replacement is due, the process uses the square drive on the tensioner to de-tension the belt, the pulleys are checked for bearing play, and the new unit is torqued to the service manual spec. Belt routing must match the under-bonnet diagram, and the engine is briefly run while a tech watches for clean tracking. Because the Eclipse Cross uses an automatic tensioner, a slipping belt usually means the belt or tensioner is worn—cranking down “more tension” isn’t a thing here. Sticking with quality parts and following the Mitsubishi procedure keeps the charging system happy and the cabin cool through Aussie and Kiwi summers.

Popular questions about 2017 Mitsubishi Eclipse Cross drive-belt tensioners

Does the Eclipse Cross have a manual belt adjustment?
No. It uses a spring-loaded automatic tensioner. If the belt is slipping or noisy, the fix is to inspect and replace the belt and/or tensioner, not to adjust tension.

How often should the drive-belt tensioner be replaced?
There’s no fixed interval, but many workshops replace it with the serpentine belt around 100,000–150,000 km, or sooner if there’s noise, pulley wobble, or poor belt tracking. Inspect it at each service.

Is it safe to drive with a failing tensioner?
Not recommended. A weak or seized tensioner can cause belt slip or loss, leading to charging issues and loss of A/C, and on some variants, it may affect other belt-driven accessories. Get it checked promptly.