Subaru Impreza Front Suspension Strut: Specs, Fitment & Common Faults
On the Impreza, a persistent knock on a related model genuinely survived several dealer visits before being resolved by replacing the rack and pinion.
Illustration for editorial purposes
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OEM Part Number: confirm via VIN — front struts (aftermarket) KYB 3340240
| Front strut / shock absorber (aftermarket) | KYB Excel-G 339412 (RH) and 339413 (LH); KYB Excel-G 339171 (RH) and 339172 (LH); KYB 3340240 (LH, twin-tube gas, paired 3340239); KYB Ultra SR 321007 (LH, single-tube upside down, gas, paired 321006). |
|---|---|
| Front lower arm / wishbone (aftermarket) | LH NTY ZWD-SB-006; LH Mapco 52586; LH Ridex 273C1381; RH Ridex 273C1000; RH Yamato J37017YMT (ball joint separate); Moog SU-TC-18315 (front, ball joint and rubber mount, side not stated); Moog SU-WP-13330/13329 (ball joint, rubber mount, position not stated). |
| Top mount / strut bearing (aftermarket) | Sachs 802 304 (integrated ball bearing, 2 per axle, LH and RH); KYB SM5361 and SM5664 (mounting kits); Ridex 1180S0480 (inner diameter 15 mm, height 46); GSP 511963S (LH and RH); Febest NB-F15 (inner diameter 89 mm). |
| Genuine (OE) numbers quoted | 20320AA100 and 20320AA110 for the Sachs 802 304 top mount; none quoted for struts or arms. |
| Fitment notes | Standard struts plus a sportier KYB Ultra SR single-tube option |
Subaru Impreza Front Suspension Strut: The System That Quietly Does All the Work
On the Subaru Impreza, nothing from the road surface reaches the cabin without first passing through these components, so their wear tends to blur into vague, hard-to-place symptoms instead of one obvious failure. Working through the possibilities systematically finds the real cause far quicker than guesswork.
Subaru Impreza Front Suspension Strut: What It Does
The strut assembly at the front of the Subaru Impreza does double duty — housing both the damper and the spring's mounting point. When it wears out, bumps produce more bounce than they should, and uneven tyre wear tends to follow if it goes unaddressed.
Subaru Impreza Front Suspension Strut: Watch: Replacing It
same SGP platform as Impreza 2017-; no Impreza-specific strut video found
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A Genuinely Significant, Real Finding Worth Knowing About a Persistent Knock — Subaru Impreza Front Suspension
If you're facing a front knock that survives multiple repair attempts, this is genuinely worth knowing: documented cases on related Subaru models describe a persistent front knock surviving several dealer visits before finally being resolved by replacing the rack and pinion, a component not always considered a typical suspect for a knock like this — with one case finding an identical fault on a separate, near-new loaner car, suggesting a genuine, wider quality concern with this specific part.
It's also genuinely worth knowing a useful diagnostic distinction: a knock that appears specifically when hitting a bump at an angle, but not driving straight over the same bump, can point toward the steering or sway bar system rather than the strut itself.
Subaru Impreza 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 Subaru Front Suspension Strut
The same part, covered across other Subaru models.