Vauxhall Astra Rear Springs: Specs, Fitment & Common Faults

FlexRide-equipped and lowered-chassis Astras use genuinely different rear springs from standard suspension.

Illustration for editorial purposes

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A Part That Fails Quietly, Then Suddenly

It's a slow decline followed by a sudden failure with the Vauxhall Astra's rear springs — a gradually lower ride height for months, then an abrupt break at the coil's end announced by a clunk. One rear corner sitting visibly lower than the other is the sign to watch for.

Genuinely worth knowing: FlexRide (adaptive damping) and lowered-chassis variants use different spring rates from standard suspension — confirm your exact suspension type before ordering.

Before you buy: FlexRide vs standard suspension, ride height, and body style all affect fitment. Always confirm against your VIN before ordering.

Vauxhall Astra Rear Springs: Watch: Replacing It

🎬 Watch: How to replace rear suspension springs - Vauxhall Astra J

Watch on YouTube ↗

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

Vauxhall Astra Rear Springs reference plate

OEM Part Number: confirm via VIN — rear coil springs (aftermarket) Monroe SP4515 / Suplex 23678

Accuracy note: Covers the Vauxhall Astra (K 2015-2021) 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)	Monroe SP4515 (301 mm); Suplex 23678 (standard, 296 mm); Kraft 4031185; KYB K-Flex RA5421 (303 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
Standard suspension, standard rate	Genuinely a different spring from the FlexRide and lowered-chassis versions below — confirm suspension type before ordering
FlexRide (adaptive damping)	A genuinely different spring rate from standard suspension, matched to the electronic damping characteristics
Lowered chassis, where fitted	A genuinely different, shorter spring from standard-height suspension
Estate body style	Genuinely a stiffer rear spring rate than the equivalent hatchback, to handle the increased load-carrying capacity

It's worth doing the Vauxhall Astra's rear springs as a pair rather than one at a time — mixing a new spring with an old, sagged one on the opposite side throws off ride height evenly and skews handling.

Vauxhall Astra Rear Springs: What It Does

On the Vauxhall Astra, weight support at the rear and absorbing a bump's first impact both fall to the coil spring, working in tandem with the shock absorber rather than substituting for it. A broken or sagged spring drops ride height, can affect headlight alignment, and in bad cases is enough to fail an MOT.

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Vauxhall Astra 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 Vauxhall Rear Springs

The same part, covered across other Vauxhall models.