Ford Focus Mk3 Rear Springs: Specs, Fitment & Common Faults

A cracked spring insulator or a broken chunk of the coil itself is a genuinely common, well-documented cause of rear rattle on this platform.

Generation covered: this guide is for the third-generation Focus, built 2011–2018. The newer Mk4 Focus (2018–) uses different part numbers throughout — check your V5C logbook or VIN if you're unsure which generation you have.

Illustration for editorial purposes

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A Genuinely Common, Specific Cause of Rear Rattle Worth Checking First

Across owner forums, a broken piece of coil spring insulator, or a small chunk of the spring itself, knocking around in the lower spring seat is a genuinely commonly reported cause of a rear rattle on this platform. It's worth visually inspecting the coil springs for any visible cracking or a broken end before assuming a more expensive fault is to blame.

A genuinely sensible diagnostic order: before assuming bushings or shocks are worn, it's worth visually inspecting the coil springs themselves for any visible cracking or a broken end — a genuinely common, cheap-to-fix cause that gets mistaken for expensive suspension wear.

Ford Focus Mk3 Rear Springs: A Part That Fails Quietly, Then Suddenly

On the Ford Focus Mk3, 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: engine/trim (which determines torsion beam vs multi-link rear axle) and body style all affect spring rate and fitment. Always confirm against your VIN before ordering.

Ford Focus Mk3 Rear Springs reference plate

Ford Focus Mk3 Rear Springs: OEM Part Number

Accuracy note: genuinely worth knowing: the Mk3 Focus rear suspension design changed from earlier generations — most standard cars use a torsion beam rear axle, while ST models use a multi-link independent rear suspension with a genuinely different spring and spring seat. Confirm which type your car has before assuming any part will fit.

Torsion beam axle (standard trims)	Confirm your exact engine and trim, since Ford used multiple distinct rear spring references across the Mk3's production run
ST (2.0 turbo), multi-link axle	A genuinely different spring and spring seat design from the standard torsion-beam version, reflecting the different axle architecture
Estate body style, where applicable	Genuinely a stiffer rear spring rate than the equivalent hatchback, to handle the increased load-carrying capacity

Always replace Ford Focus Mk3 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.

Ford Focus Mk3 Rear Springs: What It Does

The Ford Focus Mk3'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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Ford Focus Mk3 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 Ford Rear Springs

The same part, covered across other Ford models.