SOURCING: E70/F85 X5M Brembo Calipers For anyone doing this swap — here's what I've found on sourcing the E70/E71 X5M/X6M Brembo caliper sets. New from BMW: Don't. The per-caliper price is absurd and there's no reason to buy new for a retrofit. Used sets: eBay, FCP Euro (check their used/core section), BimmerWorld, and local wreckers. Price range for a complete set of 4: $400-800 depending on condition. I paid $600 for the set going on the E53. What to look for: Check piston condition (should move freely, no pitting), bleed screw condition (they seize and snap), and pad slide pins. If you're rebuilding anyway (you should on used calipers), piston condition matters less but seized bleed screws can turn a rebuild into a nightmare. Where NOT to source: Random Marketplace sellers who pulled them from a flood car. Salt belt cars with heavy corrosion on the caliper bodies. Any set where the seller can't tell you which vehicle they came from. Budget $800-1,000 for caliper rebuild and powdercoat on top of the purchase price. KD Powdercoat is handling ours. Has anyone sourced these from a different channel? Better price? Drop it below.

This is where WOT members help each other source smarter. WHAT GOES HERE Found a deal on a part? Post it. Include the part, the price, where you found it, and whether you've personally bought from them. "I saw this" is useful. "I bought this and here's what showed up" is gold. Looking for a specific part? Post what you need with your platform and year. Someone here has probably sourced it before and knows who has the best price, the best quality, or both. Supplier reviews — good and bad. If a vendor shipped fast and the part was right, say so. If they sent the wrong thing or ghosted on a return, say that too. FIRSTHAND REAL EXPERIENCES ONLY. Group buys. If enough of us need the same part, we negotiate together. When a group buy is active it gets its own pinned thread. Minimum 5 members committed before we approach a supplier. WHAT DOESN'T GO HERE No selling your own parts or flipping. This isn't a marketplace. If you upgraded your brakes and want to sell the takeoffs, post it in Your Build as part of your project thread — not here. No affiliate links without disclosure. If you're linking something you earn commission on, say so. We're all adults. No "I heard this brand is good" without receipts. First-hand experience or data. Forum rumors don't help anyone. THE GOAL Every part sourced smarter in here saves someone real money. If this category saves you one wrong-part order or points you to a supplier you didn't know existed, it's doing its job. Post what you know. Ask what you don't. Go WOT.