Citroen C4 Picasso Grille: Fitment, Sensors & Common Damage

On the C4 Picasso, the front grille is rarely just a styling panel — on ACC-equipped trims it also houses the radar sensor behind a small panel, worth knowing about if a fault develops.

Illustration for editorial purposes

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OEM Part Number: confirm via VIN — radiator grille (aftermarket) Diederichs 4073641 / Prasco CI4292011

Accuracy note: Covers the Citroen C4 Picasso (2013-2018) as listed in the UK aftermarket catalogues. Grilles are sold by trim and facelift, and many generations had different grilles for base, mid and top trims, with or without a radar or camera opening. Where the catalogue splits a grille into left and right or upper and lower sections, buy both halves if both are damaged. The references below are UK aftermarket catalogue listings for this generation, labelled by brand with the fitment details the catalogue gives; carmakers rarely publish the genuine number against these, so match a genuine grille against your VIN if you want a guaranteed fit.

Radiator grille (aftermarket)	Diederichs 4073641; Prasco CI4292011 (black)
Genuine (OE) numbers quoted	None quoted in the catalogue listings — the genuine grille varies by trim level, facelift and sensor options, so order it against your VIN

A Genuinely Useful Diagnostic Tip, If Fitted With Adaptive Cruise Control — Citroen C4 Picasso Grille

If the radar sensor itself genuinely is at fault, a real, well-corroborated first step before any paid diagnostics: the sensor sits behind a small panel low in the front grille, and simply cleaning this panel thoroughly has resolved the fault entirely in multiple documented cases.

Citroen C4 Picasso Grille: Cosmetic on the Surface, Functional Underneath

It's easy to think of the Citroen C4 Picasso's grille as a styling piece, but it has a real functional job too: managing airflow to the radiator, and on many current cars, housing the sensors behind adaptive cruise control or parking assistance. That's why fitment here is less straightforward than it looks.

Before you buy: grille design varies significantly by trim, and higher trims may integrate radar or camera sensors behind or within the grille itself. Always confirm against your VIN before ordering.

Citroen C4 Picasso Grille: Watch: Fitting It

🎬 Watch: How to remove a front Bumper for Citroen 4 Grand Picasso Blue HDI

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This video covers removing the front bumper, which is how the grille is reached on this car.

Citroen C4 Picasso Grille reference plate

Citroen C4 Picasso Grille: What It Does

Beyond styling, the grille on the C4 Picasso directs airflow to the radiator and, on trims equipped with adaptive cruise control, may house or sit directly in front of the radar sensor used for that system. A grille that looks compatible but lacks the correct sensor cutout can interfere with these systems even if it fits physically.

Citroen C4 Picasso Grille: Generations & Grille Finish

All generations	Chrome brightwork grille with the double-chevron badge integrated into the design, extending across the width of the car

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Citroen C4 Picasso Grille: Common Damage, DIY Difficulty & Aftermarket Advice

These are the same regardless of make or model — see our full Grille Guide for common damage types, confirming trim-specific fitment, how difficult this job is to DIY, and the ADAS calibration risk with sensor-equipped grilles.

More Citroen Grille

The same part, covered across other Citroen models.