Rear Brake Disc Of Citroën Santy

Original vehicle pain points → Product-specific adaptation solution → Advantages in installation precision: As a station wagon, the Xantia is frequently driven with full load; although the rear axle brake disc does not bear the primary braking force, significant changes in rear weight distribution impose extremely high requirements on the disc's flatness and dynamic balance. After years of use, common issues observed in original vehicles include disc corrosion and uneven wear, which lead to reduced handbrake efficiency. The brake disc for the Citroën Xantia model we have introduced (OE-4246L6) establishes its differentiated advantages across three dimensions: Adaptation and fitment: The disc replicates the original dimensions exactly-4×108 teeth, 71.1 mm centering diameter, and 62.4 mm mounting height-meaning no gaskets or drilling modifications are required during installation; it can be directly replaced with the original brake rotor. Disc flatness: The flatness of the friction surface is controlled at ≤0.02 mm, far exceeding the industry average of 0.05 mm, effectively eliminating "humming" resonance during low-speed braking. Dynamic balancing at factory calibration: Every OE-4246L6 unit undergoes 100% dynamic balancing testing prior to leaving the factory, with a residual unbalance of ≤15 g·cm, ensuring zero steering vibration during high-speed driving (≥130 km/h).

💡 Why is a custom mold used specifically for the Xantia station wagon's rear disc instead of using a generic replacement part? This is because the combination of 4×108 teeth and 71.1 mm centering for the XANTIA Break falls under specific specifications within the PSA Group; forcing the use of an approximate alternative disc would result in inaccurate centering and disc deflection. The OE-4246L6 is precisely an OEM-grade direct replacement part engineered exclusively for this chassis configuration.

The rear brake disc with part number is compatible with a wide range of vehicle models, as follows:

Citroën C4 Santy Tourer (X1):1995/06–2003/04
Citroën C4 Santy Tourer (X2):1998/01–2003/04

Multiple compatible part codes are available for the rear brake disc matching the

The brake discs for Citroën Santia models (OE-4246L6) feature a four-layer composite coating system consisting of: pre-treatment → epoxy primer → barrier intermediate coat → weather-resistant topcoat, specifically engineered for three extreme operating environments: high-humidity conditions in Europe, high-salt spray conditions in Southeast Asia, and deicing salt exposure in North America.

Layer 1 | Pre-treatment (Dual-phosphating + Passivation process): Spray-type tri-component phosphating; phosphating film thickness: 2.0–3.5 g/m²; Function: Forms a micro-rough surface layer on the cast iron substrate to provide mechanical anchoring for subsequent coatings; After treatment, proceed to the next process within 30 minutes to prevent secondary oxidation. Layer 2 | Epoxy Primer; Film thickness: 25–35 μm; Composition: Bisphenol A-type epoxy resin + amine curing agent; Adhesion: Scratch test – Grade 0 (the highest grade); Function: Forms a chemical bond with the cast iron substrate, blocking electrochemical corrosion pathways. Layer 3 | Barrier Mid-coat; Film thickness: 30–40 μm; Composition: Zinc-aluminum flakes as filler, zinc-to-aluminum ratio: 8:2; Function: Provides sacrificial anode protection, ensuring that exposed metal remains protected even in the event of localized damage to the topcoat for more than 48 hours; Resistance to neutral salt spray: ≥500 hours without red rust formation (third-party SGS test data). Layer 4 | Weather-resistant Topcoat; Film thickness: 25–45 μm; Total dry film thickness across all four layers: 80–120 μm (user-defined range); Composition: Poly-siloxane-modified acrylic resin, high-temperature resistance peak: 280°C; Appearance: Matte silver-gray, friction coefficient: μ = 0.35–0.45; For wheel hub installation positions (centering: inner ring at 71.1 mm + 4 × 10⁸ bolt holes), a non-coated interference treatment is applied to ensure direct metal contact between the wheel hub flange surface and the substrate. Elimination of assembly clearance

⚠ Neutral salt spray test conditions: 5% NaCl solution, pH 6.5–7.2, chamber temperature 35 ± 2°C, fog deposition rate 1–2 mL/(h·cm²). For OE-4246L6, 3‰ random samples are selected from each batch for salt spray testing; the requirement of "no red rust after 520 h" serves as the internal control threshold for our factory.

Regarding the new EU 2025 regulations on environmentally friendly coatings for braking components: the EU is progressively tightening restrictions on the use of high-zinc coatings, and traditional zinc-rich primers (with a zinc content ≥80%) will gradually be phased out of the market. The OE-4246L6 coating employs an eco-friendly barrier solution utilizing a low-zinc formulation (zinc content ≤30%) combined with zinc-aluminum flakes, which not only meets the 520-hour salt spray test requirements but also aligns with EU environmental trends, thereby eliminating compliance risks when exporting to the European market. 

🏭 Workshop Environment: Precision Machining Workshop – constant temperature control within ±1.5°C (user-specified accuracy), preventing micro-deformation of cast iron parts caused by temperature differences. Primary precision turning equipment: Shenyang CAK6180 horizontal CNC lathe (user-specified model), with a repeatability positioning accuracy of ±0.005 mm; designed for machining the OE-4246L6 part featuring a 251 mm outer diameter and a 62.4 mm height. Fully integrated MES production information management system; production data sampled at 1 Hz.

🔍 6 major quality control nodes across the entire process (real-time visual monitoring). Blank inspection: 100% electromagnetic induction testing to detect sand holes and cracks in the castings, with a sensitivity of Φ0.5 mm for manual defects. Precision turning: Shenyang CAK6180 double-turret system performing simultaneous machining of friction surfaces and installation surfaces, with flatness ≤0.02 mm. End-face alignment: hydraulic press plate + dial indicator alignment, ensuring a height tolerance of ±0.05 mm. Dynamic balancing verification: 4 dedicated dynamic balancing inspection stations (user-specified quantity), with an unbalance value ≤15 g·cm; automatic cutting and weight reduction if exceeding limits. Coating inspection: film thickness gauge used for 100% inspection of hub installation positions and friction surfaces, with dry film thickness controlled within the range of 80–120 μm. Final inspection and boxing: laser OCR recognition of OE-4246L6 engraved content, with an error rate of 0%. The sampling inspection rate for finished products at factory exit is 15% (as specified by the customer).

📋 System certification and defect rate control: The facility has obtained IATF 16949:2016 and ISO 9001:2015 international management system certifications; product compliance aligns with ECE R90 regulatory requirements (the Bosch-grade 4246L6 brake disc has already passed ECE-R90 certification and can serve as a performance benchmark); the ppm-based defect rate is controlled below 5,000 (0.5%), significantly lower than the industry average of 3%; post-sale defect rates are also strictly monitored.

📌 Measurement data for each OE-4246L6 component is uploaded in real-time to the MES system. Following industry best practices, the production line automatically halts for adjustment when the Cpk value falls below 1.33-this ensures that every Citroën Santy model brake disc supplied to overseas customers has verifiable documentation.

📦 Packaging:

Each unit is wrapped in OPP foam to protect the surface from scratches during transportation;
The flange area (centering: inner ring 71.1 mm + 4 × 108 bolt holes) is equipped with a crash protection pad to prevent bumps;
The hub mounting surface is protected against impacts;
The outer box is reinforced using a five-layer double-walled corrugated cardboard box;
The item is secured using both plastic wrap and strapping;
Shipped on an entire pallet: EU-standard wooden pallet, fully covered with plastic wrap and equipped with corner guards.

🛡 Warranty Period & After-Sales Policy
Warranty Start Date: Calculated from the date of installation (not the shipping or delivery date), maximizing protection for end customers.

Warranty Mileage: 80,000 km

Coverage Includes:
✅ Manufacturing defects such as disc cracking or casting porosity
✅ Steering wheel vibration caused by poor factory dynamic balancing
✅ Large-scale coating peeling (excluding human-induced scratches)

Not Covered:
❌ Abnormal brake pad wear (e.g., disc scoring caused by low-quality pads)
❌ Severe off-road or track use (e.g., track days, extreme off-roading)
❌ Installation errors (e.g., improper torque, failure to clean hub mounting surfaces)

After-Sales Response: Overseas inquiries receive a written response within 24 hours. For damaged items, provide unboxing photos and the packing list-replacements will be shipped with your next order without requiring return of the original goods, reducing inventory pressure on clients.

💰 Payment & Order Policy
First Order: 30% T/T advance + 70% before shipment

Repeat Orders (with prior cooperation): LC at sight or OA 30 days (subject to providing a D-U-N-S Number)

Sample Policy: Standard samples delivered within 7 working days; sample fee deductible against first order of USD 5,000 or more.

Q1: How can I verify if this OE-4246L6 brake disc fits my vehicle using the original part number?
A: Remove the left rear wheel brake assembly on your Citroën Xantia Break and check the OE stamp on the side of the brake disc hat or on the hub flange. If it reads "4246L6" or "00004246L6" (the standard prefix used across Peugeot/Citroën Group parts), this brake disc is a 100% match. You can also send us the last 8 digits of your Vehicle Identification Number (VIN), and we'll provide a written fitment confirmation within 24 hours. This OE-4246L6 model covers all XANTIA Break X1 (1995/1996–Jan 1998) and X2 (Jan 1998–Apr 2003) estate variants, including 1.8L, 1.9L, 2.0L, 2.1L, and 3.0L engine configurations.

Q2: What is the recommended wheel bolt torque specification for installing this brake disc?
A: The rear axle of the Citroën Xantia Break uses M12 wheel bolts with a 4×108 PCD. Following the service manual specifications for comparable Citroën brake discs-such as the Ferodo DDF1106 front vented disc-we recommend tightening the bolts diagonally to 90 N·m. Since the 4246L6 is a solid rear disc, always refer to the official Citroën workshop manual or your vehicle's repair documentation before installation. Be sure to clean the hub flange surface thoroughly and tighten all bolts diagonally to the specified torque.

For heavy-fuel-load vehicles, it is recommended to opt for thicker disc variants.

For high-output fuel models such as the Santia 3.0 V6-which feature significant curb weight plus full payload-we recommend upgrading to thicker discs or vented disc solutions. The OE-4246L6 rear solid disc features a 12.0mm thickness, which is the OEM-specified standard; do not reduce this thickness arbitrarily. If front axle braking loads are excessive, consider pairing with a front axle vented disc upgrade kit.

Domestic Export Brake Discs Must Feature Minimum Wear Thickness Markings

Per industry regulations, exported brake discs must have the minimum wear thickness (MIN THK) laser-marked in a prominent location on the disc surface. The OE-4246L6 has a minimum usable thickness of 10.8mm, with a laser engraving depth of 0.2mm that remains permanently legible, fully meeting export compliance requirements.

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