Nugeon 99-02437A rear left brake caliper for the 2015-2018 BMW X4 and other vehicles clamps the brake pads against the rotor to slow the wheel. This caliper is remanufactured and uses a floating design.
- Single steel piston, 42 mm in diameter
- Cast iron housing with a rust preventative finish
- Inlet port and bleeder screw both use M10-1.0 thread
- Housing cast number 1871B and bracket cast number 1878B for matching
Quick facts
- Part: Nugeon 99-02437A brake caliper
- Also called: disc brake caliper
- Fits: 2015-2018 BMW X4 and other vehicles
- Position: Rear left
- Material: Cast iron housing, steel piston
- Condition: Remanufactured
A caliper that sticks or leaks can show up as the car pulling to one side, fluid around the wheel or uneven pad wear. Those signs alone do not prove the caliper is the problem; a worn brake hose could be behind the same pull. Calipers are normally replaced in pairs, and this listing is one rear left caliper.
Fits
This brake caliper fits the 2015-2018 BMW X4 and the 2012-2017 BMW X3.
Specifications
Fit and size
- Position: Rear left
- Quantity for this side: 1
- Piston diameter: 42 mm (1.654 in)
- Piston quantity: 1
- Inlet port and bleeder screw thread: M10-1.0
- Housing cast number: 1871B
- Bracket cast number: 1878B
Build and materials
- Caliper type: Floating
- Condition: Remanufactured
- Housing material: Cast iron
- Piston material: Steel
- Finish: Rust preventative
- Country of origin: Mexico
In the box
One remanufactured rear left brake caliper with its mounting bracket, caliper slides, dust boots, bleeder screw, crush washers and caliper and pad hardware. Brake pads, anti-squeal shims, wear sensors, bracket mounting bolts, mounting bolts and the bleeder screw cap are not included, so plan on new bolts since the old ones may not be reusable. This listing holds one caliper, the rear left takes one, and the rear right is a separate part.
Frequently Asked Questions
Will this rear left brake caliper work on a 2012-2017 BMW X3?
Yes. Nugeon 99-02437A is a rear left caliper for the 2012-2017 BMW X3, and it also fits the 2015-2018 BMW X4.
Does this Nugeon caliper come with the mounting bracket and pads?
Nugeon 99-02437A includes the mounting bracket, caliper slides, dust boots and bleeder screw. Brake pads and bracket mounting bolts are not included.
Is this disc brake caliper a floating or fixed design?
This rear left caliper is a floating type with one steel piston, 42 mm (1.654 in) across.
How can I tell if a rear brake caliper is leaking or sticking?
During a brake service, look for fluid near the dust boot or pads that wear unevenly. In normal driving, pulling to one side or a wheel that drags also stands out.
Which casting numbers does the Nugeon 99-02437A caliper carry?
The housing carries cast number 1871B and the bracket carries 1878B, which you can match against the markings on your old caliper.
