Ford B-Max 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 Ford's smaller platforms.

Illustration for editorial purposes

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 Ford's smaller platforms. 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.

A Part That Fails Quietly, Then Suddenly

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 and body style both affect spring rate and fitment. Always confirm against your VIN before ordering.

OEM Part Numbers

Accuracy note: genuinely worth knowing: sportier trims often use a genuinely different rear axle design with a different spring and spring seat from standard cars — confirm your exact trim before ordering rather than assuming a universal fit.

Standard trims	Confirm your exact engine and trim, since Ford used multiple distinct rear spring references across most model generations
higher-output	A genuinely different spring and spring seat design from the standard version, reflecting a different rear axle architecture on the sportier trim
Estate/higher-load body style, where applicable	Genuinely a stiffer rear spring rate than the equivalent standard body style, to handle the increased load-carrying capacity

Always replace 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.

What It Does

The 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.

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.

Ford B-Max Rear Springs: Specs, Fitment & Common Faults

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

OEM Part Numbers

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