Mitsubishi ASX Rear Springs: Specs, Fitment & Common Faults

Genuinely worth confirming first: drivetrain and left/right side both affect which rear spring fits.

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A Part That Fails Quietly, Then Suddenly

On the Mitsubishi ASX, a rear spring often sags gradually for months without an obvious symptom beyond a slightly lower ride height, then fails suddenly at the coil's end with an audible clunk — worth bearing in mind if you notice one rear corner sitting lower than the other.

Before you buy: drivetrain, trim, and left/right side all affect spring rate and fitment. Always confirm against your VIN before ordering.

Mitsubishi ASX Rear Springs: Watch: Replacing It

🎬 Watch: 2007-12 Mitsubishi outlander rear coil springs install

Watch on YouTube ↗

This video shows a closely related car on the same platform, so the spring seats and fixings can differ slightly on yours.

Mitsubishi ASX Rear Springs reference plate

OEM Part Number: confirm via VIN — rear coil springs (aftermarket) Kilen 58031 / Monroe SP4506

Accuracy note: Covers the Mitsubishi ASX (2010-) as listed in the UK aftermarket catalogues. Rear coil springs are sold as a pair for the axle and should be replaced as a pair, because a new spring beside a tired one leaves the car sitting unevenly. The right spring depends on the engine and gearbox, the suspension type (standard, sport or heavy-duty) and, on some cars, the body style. The references below are UK aftermarket catalogue listings for this generation, labelled by brand with the fitment details the catalogue gives; carmakers rarely publish the genuine number against these, so match a genuine spring against your VIN if you want a guaranteed fit. genuinely worth knowing: rear springs are sold in left/right pairs matched to a specific rate marking — confirm the marking on your existing spring rather than assuming from trim alone.

Rear coil springs (aftermarket)	Kilen 58031; Monroe SP4506 (338 mm); Sachs 994349 (standard, 352 mm); Suplex 20227 (352 mm)
Genuine (OE) numbers quoted	None quoted in the catalogue listings — the genuine spring varies by engine, suspension type and body style, so order it against your VIN
Front-wheel drive, standard rate	Genuinely a different spring from the AWD version below — confirm drivetrain and side before ordering
AWD	A genuinely different spring from the front-wheel-drive version, reflecting the different rear axle layout

Always replace Mitsubishi ASX rear springs in pairs — a single new spring paired with an old, sagged one on the other side creates an uneven ride height and handling bias.

Mitsubishi ASX Rear Springs: What It Does

The Mitsubishi ASX's rear coil spring supports the weight of the car's rear end and absorbs the initial impact of a bump, working alongside the shock absorber rather than replacing its function. A sagged or broken spring lowers ride height, can affect headlight aim, and in severe cases is an MOT failure item.

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Mitsubishi ASX Rear Springs: Warning Signs, DIY Difficulty & Aftermarket Advice

These are the same regardless of make or model — see our full Rear Springs Guide for symptoms of a failing spring, confirming fitment against your VIN, and OEM vs aftermarket guidance.

More Mitsubishi Rear Springs

The same part, covered across other Mitsubishi models.