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#1
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Caliper Support Bolt Replacement (2004 X5 3.0i)
Appreciate any guidance. I have 3 options for these bolts once they are removed (to replace the rotors): 1- Replace with BMW bolts costing around $300 for all 4 wheels, 8 bolts 2-Replace with same grade bolts (10.9) from the local bolt supplier ($40 total) 3-Reuse. Bolts look fine with no sign of wear/rust at all. Please help me choose a right option. Thanks, |
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#2
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I've never replaced caliper support bolts (assume you're referring to caliper bracket bolts)... so I guess option 3 would be my vote. Clean and reuse.
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2005 X5 4.4i Build 04/05 Maintenance/Build Log Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles) 2006 X5 4.8is Build 11/05 Maintenance/Build Log Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles) 2010 X5 35d Build 02/10 Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles) |
#3
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Reuse unless there’s an issue. These aren’t special bolts, so there’s no real need to spend $300.
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2011 M3 2006 Sierra 2500HD 4WD LBZ/Allison 2004 X5 3.0i 6MT 1995 M3 S50B32 1990 325is 1989 M3 S54B32 Hers: 1989 325iX 1996 911 Turbo |
#4
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Yep, just reuse. No point of replacing them.
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Current rides: E65 730d, F10 520d, E34 520i BMW glasses on since 2004. |
#5
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They are in a way special; they are grade 10.9 and are plated not plain. The washers are of hardened type.
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#6
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Caliper Support Bolt Replacement (2004 X5 3.0i)
They are not torqued near yield I reuse. Does BMW recommend non reuse? They often do for CYA legal reasons in suspension parts.
From TIS: 2AZ Brake caliper to steering knuckle (screws lightly oiled, contact surfaces between brake caliper and steering knuckle cleaned and grease-free) 110 N·m. It states if self locking or microencapsulated replace them. I'm not aware that E53 uses either. I reuse them.
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2011 E70 • N55 (me) 2012 E70 • N63 (wife) Last edited by andrewwynn; 01-04-2022 at 01:38 AM. |
#7
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There's nothing unusual about that. If you hadn't been aware of the specs, I'd have brought that up, but you already know to buy hardware of the correct spec.
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2011 M3 2006 Sierra 2500HD 4WD LBZ/Allison 2004 X5 3.0i 6MT 1995 M3 S50B32 1990 325is 1989 M3 S54B32 Hers: 1989 325iX 1996 911 Turbo |
#8
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Reuse the bolts for the bracket to hub. Replace the pins that hold the caliper to the bracket. Replace the caliper mounting boot as well. Reinstall the new pins DRY.
Note: At 100K I personally replace all bolts, boots, lines, rebuild the calipers etc at the brakes. The replacement bolts use a male TORX head, so you will in the future need a FEMALE Torx socket. The ability to torque and unbolt is improved moving forward at the socket self centers on twist. ????? We are discussing #3 on Image below I looked up the costs from a local dealer. Hex bolt M12X1,5X41 ZNS3 4 11/2005 34116767217 The cost is Disc Brake Caliper Bracket Mounting Bolt - BMW (34-11-6-767-217) MSRP: $17.98 Discount: $3.59 (20% off) Sale Price: $14.39 I think to OP clicked on the assembly part (Bracket, bolts,etc) number #2
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2005 X5 4.8IS The Blue ones are always FASTER.... Current Garage: 2005 X5 4.8is 2002 M5 TiSilver 2003 525iT 1998 528i Former Garage Stable Highlights 2004 325XiT Sport 1973 De Tomaso Pantera, L Model 1970 Dodge Challenger T/A 4 sp Alpine White 1970 Dodge Challenger T/A 4 sp GoManGo Green 1971 Dart Sport, “Dart Light” package 1969 Road Runner 383 1968 Ply Barracuda 340S FB Sea-foam Green Last edited by StephenVA; 01-04-2022 at 12:58 PM. |
#9
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Quote:
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2011 M3 2006 Sierra 2500HD 4WD LBZ/Allison 2004 X5 3.0i 6MT 1995 M3 S50B32 1990 325is 1989 M3 S54B32 Hers: 1989 325iX 1996 911 Turbo |
#10
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Reuse them. There's nothing special about them besides the grade. As Andrew said, they're not torque to yield. If you are concerned, get proper grade bolts from a local supplier. No point in paying BMW's stupid mark up for a bolt you can get for a lot less.
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