Land Rover Defender Brake Discs: Specs, Fitment & Wear Symptoms

A genuinely alarming, honest account: a nearly new car with just 10,000 miles had all four discs warp, with the dealer refusing warranty and unable to explain why — plus a genuine account of pads fitted backwards twice, mimicking warped discs entirely.

Illustration for editorial purposes

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OEM Part Number: LR187240 (genuine front disc — confirm via VIN) — aftermarket front discs Zimmermann 450.5231.30

Accuracy note: Covers the Land Rover Defender (L663 2020-) as listed in the UK aftermarket catalogues. Front brake discs are sold by diameter and thickness, and most models have two or three disc sizes depending on engine, brake size and trim — a 278 mm disc will not fit a car built with 300 mm brakes, so the caliper carrier and the disc must match. The references below are UK aftermarket catalogue listings for this generation, labelled by brand with diameter x thickness in mm; genuine numbers are shown only where a listing quotes one. Measure the old disc or check the brake size against your VIN before ordering, replace discs in pairs with new pads, and scrap any disc at or below its minimum thickness.

Front brake discs (aftermarket)	Zimmermann 450.5231.30 (349 x 34 mm, vented, two-piece with steel hub, 5 holes, coated high-carbon, ECE R90, min 32 mm); Zimmermann 450.5212.52 (380 x 34 mm, vented, drilled, 5 holes, coated high-carbon, Sport Coat Z, min 31 mm); febi bilstein 108529 (380 x 34 mm, vented, 5 holes, coated high-carbon, min 31 mm); Blue Print ADJ134305 (380 x 34 mm, vented, 5 holes, coated high-carbon, min 31 mm)
Disc sizes & variants	Two front sizes, 349 x 34 mm (two-piece, steel hub) and 380 x 34 mm, both vented on a 5 x 120 mm PCD with a 79 mm centre bore. The 349 mm disc is the standard brake on the four-cylinder versions and the 380 mm disc is the larger brake on the six-cylinder and higher-output versions.
Genuine (OE) numbers quoted	LR187240 (genuine front disc number for this model — confirm via VIN, as several disc sizes exist)
Fitment notes	Minimum thickness is 32 mm for the 349 mm disc and 31 mm for the 380 mm disc. Brembo 09.C820.11 (380 x 34 mm, min 32 mm), Brembo 09.D550.23 (363 x 33 mm two-piece, min 31 mm), Ferodo DDF2601C-1 (380 x 34 mm, min 31 mm), Delphi BG9390C (380 x 34 mm) and Jurid 563179JC-1 (380 x 34 mm) are listed for this generation without a stated fitting position. The 365 x 25 mm discs listed (Brembo 09.B504.11, ATE 24.0125-0234.1, Jurid 563250JC-1) are the rear size. Bosch, TRW, Textar and Ridex are not listed.

Land Rover Defender Brake Discs: The Part That Pads Depend On

On the Land Rover Defender, wear on one of this pair accelerates wear on the other, so a pad change booked as routine maintenance often turns up discs that have quietly deteriorated alongside them.

Before you buy: disc size and design vary by trim, engine size and whether your car has the standard or "sport" brake package. Always confirm against your VIN before ordering.

Land Rover Defender Brake Discs: Watch: Replacing It

🎬 Watch: How To Replace Front Brake Pads and Rotors for 2017 - 2021 Land Rover Discovery (sister (discovery 5 l462))

Watch on YouTube ↗

No L663 front disc video found; Discovery 5 shares the D7 platform and brake setup.

Land Rover Defender Brake Discs reference plate

Land Rover Defender Brake Discs: What They Do

Brake discs provide the surface the brake pads clamp against to slow the car, converting momentum into heat through friction. Larger, sportier trims of the Defender typically use bigger discs than standard versions to handle the additional heat generated by more aggressive braking.

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A Genuinely Alarming, Honest Real Account Worth Knowing — Land Rover Defender Brake Discs

If a vibration under braking develops on a nearly new car, this is genuinely worth knowing: one documented case saw a car just 10 months old with only 10,000 miles on the clock develop a bad vibration under braking, with a dealer confirming all four discs had warped. The dealer refused to replace them under warranty, couldn't explain why this had happened on such a young car, and couldn't guarantee the same thing wouldn't happen again after any replacement. It's genuinely worth knowing this level of dealer uncertainty on a car this new has been documented, worth pushing back and seeking a second opinion or escalating directly to the manufacturer rather than accepting a warranty refusal on a car this young without a clear explanation.

A genuinely honest, real account worth knowing about an easily overlooked cause: one documented case saw a persistent vibration eventually traced not to warped discs at all, but to brake pads that had been fitted backwards, since pads are genuinely directional. This exact mistake was documented happening twice, from two different specialists, on the same car, before a third specialist finally identified the actual cause — worth confirming any pads have been fitted the correct way round before assuming the discs themselves are at fault.

It's also genuinely worth knowing a useful alternative cause worth checking: an axle seal leaking oil or grease directly onto the disc surface can produce vibration symptoms very similar to genuinely warped discs, without the discs themselves being warped at all — worth checking for this specific kind of contamination before committing to a disc replacement.

Land Rover Defender Brake Discs: Wear Symptoms, DIY Difficulty & Aftermarket Advice

These are the same regardless of make or model — see our full Brake Discs Guide for warning signs to watch for, confirming fitment against your VIN, and choosing a reliable aftermarket disc.

More Land Rover Brake Discs

The same part, covered across other Land Rover models.