Vauxhall Astra Front Suspension Strut: Specs, Fitment & Common Faults

On the Astra, front-end knocking is overwhelmingly, consistently traced back to worn anti-roll bar drop links — cheap to fix, but only if you buy genuine parts.

Illustration of a suspension strut and coil spring

Illustration for editorial purposes

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OEM Part Number: confirm via VIN — front struts (aftermarket) Bilstein 22-257574 / Sachs 317 499

Accuracy note: Covers the Vauxhall Astra (K 2015-2021) as listed in the UK aftermarket catalogues. Front struts, lower arms and top mounts are sold by side and by suspension spec — standard, sport / lowered (S line, M Sport, R-Line, ST-Line etc.), heavy-duty and adaptive / electronic damping all use different part numbers, and some makers split by engine or front axle load. The references below are UK aftermarket catalogue listings for this generation, labelled by brand; genuine numbers are shown only where a listing quotes one. Confirm the fit against your VIN, and replace struts and top mounts in pairs.

Front strut / shock absorber (aftermarket)	Sachs 317 499 (left) and 317 500 (right) (twin-tube gas, ST32/22X166A); Sachs 317 503 (left) and 317 504 (right) (twin-tube gas, ST32/22X81A); Bilstein 22-257574 (left) and 22-261571 (right) (B4 OE replacement); Bilstein 35-261582 (left) and 35-261599 (right) (B8 Performance Plus, upside-down mono-tube); Bilstein 35-261612 (right, B6 Performance); Meyle 626 623 0037 (right, replace in pairs)
Front lower arm / wishbone (aftermarket)	LH Meyle 616 050 0049/HD (ball joint, reinforced), Delphi TC3470 (ball joint), Ridex 273C2813 (ball joint), KYB KSC5743; RH Mapco 55773 (ball joint), Delphi TC3471 (ball joint), KYB KSC5742
Top mount / strut bearing (aftermarket)	Lemförder 38316 01 (integrated ball bearing, two per axle); Sachs 803 103 (integrated ball bearing, two per axle); Vaico V40-0983 (integrated ball bearing); febi 181869 (left, ball bearing); Topran 209 081 (pairs only); KYB SM5888
Genuine (OE) numbers quoted	Lemförder 38316 01 and Sachs 803 103 (top mounts) 13377814, 39028988; Original Imperium 38733 (top mount) 13377814
Fitment notes	Two Sachs strut types are listed with different rod and length codes, so match by old part or VIN; B8 and B6 are uprated options and the rest are standard.

Confirmed: Drop Links Are Overwhelmingly the Most Common Cause — Vauxhall Astra Front Suspension

Across Vauxhall Astra owner forums, one specific cause of front-end knocking comes up so consistently it's worth checking first, before anything else: the anti-roll bar drop links (also called stabiliser links) connecting the anti-roll bar to the suspension strut. These are relatively cheap, simple parts, but wear here is extremely common and produces exactly the kind of knock or clonk heard over bumps and rough surfaces that gets owners chasing far more expensive suspects first.

A genuinely important buying tip: multiple owners report cheap aftermarket or budget eBay drop links failing again within a very short time — sometimes days — after fitting, at which point the knock returns and gets mistakenly blamed on something else entirely, when in fact the same worn part just needs replacing again with a better-quality unit. Genuine Vauxhall (GM) drop links, or well-regarded aftermarket brands like Delphi or Lemförder, cost only a little more but consistently last far longer.

A genuinely useful self-check on the Vauxhall Astra before paying for a diagnosis: with the car safely on ramps or axle stands, push upward on the anti-roll bar near where the drop link connects — a clear knock or rattle at that point strongly confirms a worn drop link. It's also worth checking that the top strut mount nuts are torqued correctly, since a simply under-tightened nut can produce an almost identical knocking noise and is sometimes overlooked in favour of assuming a worn part needs replacing.

Vauxhall Astra Front Suspension Strut: The System That Quietly Does All the Work

On the Vauxhall Astra, every bump, pothole and corner passes through these components before you ever feel it in the cabin, which is exactly why wear here shows up as vague, hard-to-pin-down symptoms rather than one obvious failure. A methodical check usually finds the culprit faster than guesswork.

Vauxhall Astra Front Suspension Strut: Watch: Replacing It

🎬 Watch: Opel Astra K Stoßdämpfer vorne ausbauen, Federbalg, Anschlagdämpfer und Domlager erneuern (non-English)

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German, Astra K front strut/top mount; no English Astra K video found

Vauxhall Astra Front Suspension reference plate

Before you buy: suspension components vary by trim, engine weight and whether your car has the standard or sport-tuned setup. Always confirm against your VIN before ordering.

Vauxhall Astra Front Suspension Strut: What It Does

The Vauxhall Astra's front suspension strut combines a shock absorber with the coil spring mounting point in one assembly, controlling how quickly the suspension compresses and rebounds over bumps. A worn strut lets the car bounce excessively after a bump instead of settling quickly, and can accelerate uneven tyre wear if left unaddressed.

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Vauxhall Astra Front Suspension Strut: Warning Signs, DIY Difficulty & Aftermarket Advice

These are the same regardless of make or model — see our full Front Suspension Strut Guide for symptoms of worn bushings and ball joints, confirming fitment against your VIN, and rubber vs polyurethane guidance.

More Vauxhall Front Suspension Strut

The same part, covered across other Vauxhall models.