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Brake calipers rarely get attention until they stick, leak, or chew through pads unevenly. On the BMW E46 platform — the chassis under the 2001–2004/2005 320i and the 2001–2006 325Ci — the front right caliper is a frequent offender, and it almost never announces trouble with a dashboard light first.

This guide breaks down the Front Right Brake Caliper (1Pc) for the 2001–2004/2005 BMW 320i and 2001–2006 BMW 325Ci: what it replaces, how it is remanufactured, which fault codes point at it, and how to install it without costly mistakes.

Every number below — specs, torque values, DTC codes, bedding procedure — comes straight from the product's technical data. Facts first, adjectives last.

Why the Front Right Caliper Matters on the E46

The E46 3 Series spans the M52TU and M54 engine generations, and its front axle runs a single-piston floating caliper. Under hard braking, weight transfer loads that axle heavily — and a seized piston, torn dust boot, or corroded slide pin on the passenger side then produces asymmetric pull, tapered pads, and heat checking on the rotor.

The technical data puts the right-side caliper at roughly 60–70% of total braking force during dynamic weight transfer. That share is why a dragging right-front unit shows up fast in pedal feel, rotor temperature, and pad wear.

Fitment covers the 2001–2004/2005 BMW 320i, the 2001–2006 BMW 325Ci, and the E46-chassis 323i, 325i, and 328i. The caliper cross-references BMW OEM numbers 34116758113 and 34116758114 (superseded), so it bolts on with no bracket modification.

Technical Specifications

What the 10-Stage Remanufacturing Process Delivers

This is a remanufactured unit built to ISO 9001:2026 process standards — not a quick sand-and-seal job. Each caliper passes through ten documented stages:

• Core inspection
• Chemical stripping
• Media blasting
• Dimensional verification
• Precision bore honing
• New seal and piston installation
• Hydraulic pressure testing to the 2,500 PSI burst threshold
• Coating application
• Final assembly QA
• Vacuum-sealed packaging

Two details matter most day to day. The seals are brand-new EPDM, compatible with DOT 4 LV and DOT 5.1 fluid. And the electrophoretic coating is rated at 800+ hours of salt-spray resistance — above the 720-hour benchmark that 2026 ISO standards set for aftermarket calipers. Real protection if you park on salted winter roads.

DTC Codes That Point to the Front Right Caliper

A failing caliper rarely sets a direct OBD-II code. On the E46, trouble usually surfaces through the DSC module, wheel speed anomalies, or uneven pad-wear sensor triggers. These five codes are the ones most often tied to right-front caliper degradation:

Before you order, run a brake drag test. Raise the front-right wheel, spin it by hand, and compare resistance with the left side. A difference over 15% justifies a caliper inspection. Check the slide pins too — corroded pins, not piston failure, are the number one cause of E46 caliper drag.

Installation: the 2026 Protocol in Six Steps

The caliper mounts like any single-piston floating unit, but these six points separate a clean job from a comeback:

1. Pre-fill and bench-bleed before mounting. Use a syringe or vacuum bleeder. Trapped air in the E46 DSC hydraulic unit needs dealer-level tools (GT1/ISTA) to purge — keep it out from the start.
2. Fit new bracket bolts. BMW specifies torque-to-yield (TTY) fasteners; reuse is prohibited. Torque to 110 Nm with medium-strength threadlocker (Loctite 243 or equivalent).
3. Lubricate the slide pins with synthetic ceramic-based grease. Petroleum-based grease swells EPDM bushings, and dry pins remain the leading cause of premature caliper failure.
4. Torque the banjo bolt to 35 Nm and always fit new copper crush washers — never reuse the old ones.
5. Flush the whole system with DOT 4 LV (ISO 4925 Class 6). BMW's service guidance keeps the 2-year fluid interval for vehicles in active use.
6. Bed the pads. Do 8–10 moderate stops from 50 km/h to 20 km/h, then 3 firm stops from 80 km/h to 30 km/h, leaving 30 seconds between stops so the friction surfaces don't glaze.

Torque and Thread Quick Reference

• Bracket bolts: 110 Nm (81 ft-lbs), new TTY bolts plus medium threadlocker
• Banjo bolt: 35 Nm with new copper crush washers
• Bleeder screw: M10 × 1.0 thread

Pair It with Fresh Pads — and Get the Fluid Right

A remanufactured caliper works best with new pads behind it, and doing both in one session saves a second teardown. The Front and Rear Ceramic Brake Pad Kit for BMW Z4, 325Ci, 318ti, 320i, 325i, 325xi, and 328i covers the same E46 applications, so caliper and pads can go on together.

Want the full picture on ceramic pad selection — dust levels, cold bite, rotor wear? The 2026 guide to front and rear ceramic brake pads for the BMW 228i, 230i, 320i, 328i, 330i, 428i, and 430i xDrive walks through it model by model, 320i included.

Brake Fluid Rules

DOT 4 LV (ISO 4925 Class 6) gives the sharpest DSC and ABS response. Standard DOT 4 and DOT 5.1 are also compatible with the EPDM seals. One hard rule: never use DOT 5 silicone fluid — it is incompatible with the E46 ABS/DSC hydraulic unit and will swell the seals and take the system down.

While You're in the Engine Bay

Brake jobs usually happen at the mileage where the charging system starts to fade. If voltage reads low or the battery light flickers at idle, the ECCPP alternator for the BMW 320i 2.2L (2001–2005) and 325Ci 2.5L (2001–2006) covers the same vehicle range as this caliper.

Need more than one brake component? The full Brakes & Brake Parts collection gathers calipers, pads, rotors, and hardware in one place.

Frequently Asked Questions

Order the Caliper, Torque It Right, Drive

Not Sure About Fitment? Ask First

If anything above doesn't match your build — engine code, production month, rotor size — send your model year and VIN to support@koeep.com or message the team on WhatsApp. Workshops and bulk buyers can submit quantities through the request-for-quote page.