BMW 4 Series Front Bumper: Fitment, Sensors & Common Damage

On the 4 Series, a dealer's stone impact diagnosis genuinely typically isn't covered under warranty, and a working used sensor can often be sourced more cheaply.

Illustration for editorial purposes

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BMW 4 Series Front Bumper: OEM Part Number

Accuracy note: genuinely worth knowing: front bumper damage on a 4 Series is also a good moment to inspect the crash structure behind it — the foam impact absorber and mounting brackets can be damaged even when the visible cover looks salvageable, and replacing the cover alone without checking these hides a genuine safety issue.

BMW 4 Series Front Bumper: More Than Just a Plastic Panel

There's more hidden in the BMW 4 Series's front bumper than most people expect: parking sensors, adaptive cruise control radar, and fog light housings are all routinely integrated, complicating what would otherwise be a simple replacement after minor impact damage.

Before you buy: bumper specification varies significantly by trim, particularly around parking sensor cutouts, radar mounting points and fog light provisions. Always confirm against your VIN before ordering.

BMW 4 Series Front Bumper: What It Does

Beyond absorbing minor impacts, the front bumper on higher trims of the 4 Series often houses parking sensors, the radar sensor used for adaptive cruise control, and fog lights. A bumper that looks compatible can still be missing the correct cutouts or mounting provisions for your specific trim's equipment.

BMW 4 Series Front Bumper reference plate

BMW 4 Series Front Bumper: Generations & Colour

Standard trims	Alpine White (no-cost), Jet Black, Black Sapphire, Mineral Grey
M4	Isle of Man Green and Toronto Red are popular performance-trim shades; significantly different front bumper with larger air intakes than standard trim

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A Genuinely Useful Piece of Context Worth Knowing About Parking Sensor Faults — BMW 4 Series Front Bumper

If a parking sensor has failed and a dealer has diagnosed stone impact damage, this is genuinely worth knowing: this specific diagnosis typically isn't covered under warranty, and a genuinely working used or aftermarket replacement sensor can often be sourced considerably more cheaply than a dealer's own parts price on related models.

A genuinely useful diagnostic technique worth trying first: with the ignition on and the car in reverse, putting your ear close to each sensor should reveal a faint clicking sound from every working sensor — the one that stays silent is the faulty one.

It's also genuinely worth knowing that a persistent parking sensor fault has, in documented cases, survived recalibration, software updates, and even a brand new sensor, with the actual underlying cause ultimately turning out to be the wiring harness itself.

BMW 4 Series Front Bumper: Common Damage, DIY Difficulty & Aftermarket Advice

These are the same regardless of make or model — see our full Front Bumper Guide for common damage types to check for, confirming fitment against your VIN, and the sensor-calibration risk with cheap aftermarket covers.

More BMW Front Bumper

The same part, covered across other BMW models.