Subaru Outback Rear Springs: Specs, Fitment & Common Faults

Genuinely worth knowing: the rear spring and shock are commonly sold together as a complete assembly on Subaru's platform, not always as separate parts.

Illustration for editorial purposes

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A Part That Fails Quietly, Then Suddenly

On the Subaru Outback, 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.

Genuinely worth knowing: the rear spring and shock are commonly sold together as a complete strut assembly on this model rather than always as separate parts — check whether a listing is for the complete assembly or the spring alone before ordering.

Before you buy: turbo vs naturally aspirated, transmission type, and generation all affect fitment. Always confirm against your VIN before ordering.

Subaru Outback Rear Springs: Watch: Replacing It

🎬 Watch: 2009 Subaru Outback rear spring and strut replacement

Watch on YouTube ↗

This video is of an earlier generation of the same model; the job is similar but fixings can differ slightly.

Subaru Outback Rear Springs reference plate

OEM Part Number: confirm via VIN — rear coil springs (aftermarket) Kilen 63361 / KYB K-Flex RA5908

Accuracy note: Covers the Subaru Outback (BS 2015-2020) 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: Subaru's own parts catalogue can list separate rear spring references for automatic and manual transmission versions of the same engine, in addition to the turbo/non-turbo split.

Rear coil springs (aftermarket)	Kilen 63361; KYB K-Flex RA5908 (308 mm); Lesjöfors 4288361; Triscan 87506862
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
Naturally aspirated, standard rate	Genuinely a different spring from the turbo version below — confirm engine and transmission before ordering
Turbo, where fitted	A genuinely different, typically stiffer spring from the naturally aspirated version

Always replace Subaru Outback 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.

Subaru Outback Rear Springs: What It Does

The Subaru Outback'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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Subaru Outback 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 Subaru Rear Springs

The same part, covered across other Subaru models.