BMW 34218541370 Rear Brake Caliper

( Manufacturer Part Number: 34218541370 ), ( Part Type: Brake Caliper ), ( Vintage Part: Yes ), ( Country Of Origin: Germany )

Review BMW Rear Brake Caliper fits K1300R K1200R K1300S K1200S

The **BMW 34218541370 rear brake caliper** is a precision-engineered component designed to deliver exceptional stopping power and reliability across a range of high-performance motorcycles, including the iconic **BMW K1300R, K1200R, K1300S, and K1200S** models. Crafted from high-grade **cast aluminum alloy**, this caliper is built to withstand the demands of aggressive riding, long-distance touring, and spirited track use, ensuring consistent performance even under extreme thermal and mechanical stress. The **dual-piston floating caliper design** provides optimal pad-to-rotor contact, maximizing braking efficiency while minimizing pad wear and heat buildup, a critical advantage for riders who demand both precision and longevity from their braking system.

At the heart of this caliper lies a **durable and responsive hydraulic system**, featuring **sealed piston assemblies** that maintain consistent pressure and prevent fluid leakage, even under high G-forces during hard braking. The **precision-machined guide pins and bores** ensure smooth, vibration-free operation, reducing the risk of brake drag or uneven pad wear that can compromise both performance and rider comfort. The caliper s **robust mounting bracket** is engineered to securely fasten to the motorcycle s rear axle, absorbing lateral forces and maintaining alignment under heavy braking loads, which is particularly beneficial for riders who push their bikes to their limits on winding roads or racetracks.

For those seeking an upgrade or replacement, this caliper is compatible with **BMW s high-performance brake systems**, often paired with **Brembo or EBC brake pads** for enhanced stopping power and durability. The **corrosion-resistant finish** ensures longevity in varying environmental conditions, from coastal salt spray to desert dust, making it a reliable choice for both urban commuters and global adventurers. Whether you re a touring enthusiast seeking confidence-inspiring braking on long journeys or a track-focused rider demanding razor-sharp performance, this **34218541370 rear brake caliper** delivers the precision, strength, and reliability expected from BMW s legendary engineering. Its seamless integration with BMW s braking system ensures that every stop is controlled, predictable, and free from the compromises associated with inferior aftermarket alternatives.

### **Pros and Cons of Buying Used BMW 3-Series Rear Brake Calipers (M1300R, K1200R, K1300S, K1200S) from a Specific Listing (BMW 34218541370)**

#### **Pros**

1. **Compatibility with Multiple BMW Models**

- The listed calipers (likely from a BMW 3-Series, M1300R, K1200R, K1200S, or K1300S) are designed to fit multiple high-performance BMW motorcycles, including:

- **BMW K1200R (2012 2020)** The most common model, known for reliability and aftermarket support.

- **BMW K1300R (2020 present)** Similar to the K1200R but with updated electronics and styling.

- **BMW K1200S (2012 2020)** A sportier variant of the K1200R with a more aggressive fairing.

- **BMW K1300S (2020 present)** The sportier sibling of the K1300R, with a more aggressive stance and performance tuning.

- **BMW M1300R (2023 present)** The flagship model, featuring a more powerful engine and premium features.

- This makes the calipers a versatile purchase for owners of these bikes, reducing the need for multiple part numbers.

2. **High-Quality BMW Components**

- BMW uses durable, precision-engineered brake calipers in its high-performance bikes, built to last under heavy use.

- The **4-piston floating caliper design** (common in these models) provides strong stopping power and consistent pad wear.

- The **stainless steel construction** resists corrosion, which is important for bikes ridden in varying weather conditions.

3. **Aftermarket Support and Availability**

- These calipers are widely available from **OEM (Original Equipment Manufacturer) sources** (BMW dealers, authorized distributors) and **aftermarket suppliers** (e.g., **Brembo, EBC, Hawk, or budget brands**).

- If the used calipers are in good condition, they can be a cost-effective alternative to buying new.

- Many riders upgrade to **aftermarket calipers** (e.g., **Brembo M50 or M50.1**) for better performance, but OEM calipers are still reliable for daily riding.

4. **Potential Cost Savings**

- Buying used calipers can be significantly cheaper than purchasing new ones, especially if the listing includes **brake pads, hardware, or a full brake kit**.

- If the calipers are in **excellent condition**, they may only require minor refurbishment (cleaning, new seals, or pad replacement) before installation.

5. **Compatibility with Upgrades**

- These calipers can be paired with **aftermarket brake systems** (e.g., **Brembo, AP Racing, or EBC**) for improved performance.

- Some riders **swap out OEM calipers** for aftermarket versions (e.g., **Brembo M50.1**) for better heat dissipation and stopping power, making used OEM calipers a stepping stone.

---

#### **Cons**

1. **Age and Wear of Used Parts**

- **Worn brake pads** (though these may be included in the listing).

- **Stiff or seized pistons** (common in older calipers due to lack of use or corrosion).

- **Cracked or warped brake rotors** (if the calipers were part of a full brake assembly).

- **Leaking brake fluid** (indicating worn seals or a cracked caliper body).

- **Corrosion** is a risk if the calipers were stored improperly (e.g., in a damp environment).

2. **Potential for Hidden Damage**

- **Internal corrosion** (especially in the piston area).

- **Cracked or deformed caliper housings** (common in high-performance bikes due to heat cycling).

- **Worn or seized slide pins** (affecting caliper movement).

- A **visual inspection alone is insufficient** the calipers may need **disassembly and cleaning** to confirm their condition.

3. **Compatibility Issues with Modified Bikes**

- If the bike has **aftermarket modifications** (e.g., **larger rotors, different brake lines, or custom brake masters**), the used calipers may not fit perfectly.

- Some **K1300S/M1300R models** have **different mounting points** compared to older K1200R/S models, requiring **adapters or modifications**.

4. **Risk of Incompatibility with Newer Models**

- While these calipers are **mechanically similar** across generations, **electronic integration** (e.g., **ABC, DTC, or brake-by-wire systems**) may differ.

- The **K1300R/S (2020 )** has **updated brake control systems** that may not work optimally with older calipers unless fully compatible.

- The **M1300R** has **premium brake components**, and mixing OEM and aftermarket parts may affect performance.

5. **Lack of Warranty or Guarantee**

- Used parts typically come with **no warranty**, meaning you bear the risk of **immediate failure or premature wear**.

- If the calipers are **not in perfect condition**, you may end up spending extra on **repairs, replacements, or professional refurbishment**.

6. **Potential for Counterfeit or Salvage Parts**

- Some listings may sell **salvage-title parts** or **counterfeit calipers** (especially on third-party marketplaces).

- **BMW 34218541370** is a **specific part number**, but verifying its **authenticity and origin** is crucial to avoid scams.

---

### **Key Considerations Before Purchase**

1. **Inspect for Physical Damage**

- **Rust or corrosion** (especially around the piston and slide pins).

- **Cracks or deformities** in the caliper housing.

- **Seized or stiff pistons** (test by trying to retract them manually).

- **Worn or missing seals** (indicating brake fluid leaks).

2. **Test Functionality**

- **Bleed the brake system** to check for leaks.

- **Test the brake lever/pump** to ensure smooth operation.

- **Check for uneven pad wear** (indicating misalignment).

3. **Verify Compatibility**

- Confirm that the calipers match your **exact model year and variant** (e.g., **K1200R vs. K1300S** may have slight differences).

- Check if the **brake rotors and pads** included are compatible (some models use **different rotor sizes**).

4. **Consider Professional Refurbishment**

- **Cleaning and degreasing** (removing old brake fluid and contaminants).

- **Replacing seals and pistons** (if worn).

- **Machining or replacing rotors** (if warped).

5. **Compare Pricing**

- Check **new vs. used pricing** for similar calipers to ensure you re getting a **fair deal**.

- **BMW K1200R/S Calipers**: $300 $500 per caliper (pair).

- **BMW K1300R/S/M1300R Calipers**: $400 $600 per caliper (pair).

- Used calipers should be **significantly cheaper**, but **not excessively low-priced** (which could indicate damage).

---

### **Final Recommendation**

You have **verified their condition** (no major corrosion, cracks, or leaks).

They are **compatible with your exact bike model** (check year and variant).

You are **prepared to refurbish them** (clean, replace seals, test functionality).

The price is **reasonable** compared to new parts (expect **30 50% off** new prices for used calipers in good condition).

You are **comfortable with the risk** (no warranty, potential hidden issues).

They show **signs of heavy wear, corrosion, or damage** (unless you re willing to replace them).

The seller **cannot provide proof of condition** (e.g., no photos of disassembly).

The price is **too low** (could indicate salvage or counterfeit parts).

You **don t have mechanical experience** to refurbish them properly.

#### **Best Alternative Options**

1. **Buy New OEM

Details:

Removed from running 2005 Bmw K1200S Good working condition.

part #: 34218541370 prices

• $32.05-$87.46

specifications cyclevintagee:

• for models: K1300r, K1200r, K1300s, K1200s
• for makes: Bmw
• mpn: 34218541370
• part type: Brake Caliper
• vintage part: Yes
• country of origin: Germany

shipping cyclevintagee:

• class: Standard
• transit: 5-9 Days
• cost: $20.49
• carrier: FedEx
• type: Calculated
• service: FedEx Ground / FedEx Home Delivery

general cyclevintagee:

• condition: Used
• Parts Accessories > Motorcycle Scooter Parts Accessories > Other Motorcycle Scooter Parts Accessories

seller cyclevintagee:

• rating: 100.0%
• # reviews: 2475
• city: Berkeley, California

payments cyclevintagee:

• wallet: Paypal
• other
• credit card: Mastercard
• money order

returns cyclevintagee:

• policy: No Returns

offer cyclevintagee:

• availability: In Stock
• options: Ship-to-home
• best offers: True
• sold: 0
• started: March 1, 2026
• quantity: 1

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