/live/media/AI/AI_MR3857_Fro.jpg)
Will it fit your vehicle?
Confirm before you buy. Free return shipping if it doesn't fit.
Arnott MR-3857 Suspension Shock Absorber - Rear
| Brand | Arnott MR-3857 |
|---|---|
| Position | Rear |
| Grade Type | Standard |
| Product line | Magnetic Shock |
| Fits | Audi · 11 vehicles |
OE direct replacement. Magnetically controlled shock delivers the same adaptive ride as the original.
Monotube damper. Filled with magnetorheological fluid for instant changes in viscosity and stiffness.
Universal fit. Connects to the ECU with no modifications needed.
Cross-references 8J0513025A, 8J0513025B and 8J0513025C for the same application. See all 5.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
OE-Style Magnetic Ride Control
Arnott MR-3857 is a front magnetic shock for the 2009-2015 Audi TT and 2012-2013 Audi TT RS (8J). It restores the adaptive damping response used by the factory system and connects to the vehicle ECU without modification. This universal front shock fits either the left or right side on the Audi TT/TTS platform.
Key Features
- Standard-grade suspension shock absorber for magnetic ride applications
- Monotube damper filled with magnetorheological fluid
- Internal electromagnetic coils adjust damping response electronically
- Direct ECU connection with no vehicle modifications required
- Universal front fitment for left or right side use
- Part number: MR-3857
Product Details
The Arnott Magnetic Shock line focuses on OE-style electronic suspension performance. In this application, MR-3857 uses magnetorheological fluid with iron particles that react to electromagnetic input, changing fluid viscosity and shock stiffness in real time. That allows the suspension to maintain the adaptive ride control expected on the Audi TT and Audi TT RS while preserving factory electronic communication. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.
What It Helps Correct
- Front shock damping loss on magnetic suspension systems
- Electronic suspension warning messages related to a failing damper
- Excessive bounce, harshness, or inconsistent ride control
- Uneven front-end response between left and right sides
- Reduced adaptive ride performance on Audi TT/TTS models
Installation Notes
Compatible With 2009-2015 Audi TT/TTS front applications and 2012-2013 Audi TT RS front applications listed in the fitment data. Verify side and electronic suspension configuration before installation. MR-3857 is a universal front shock for either side, and it connects to the ECU without modifications. Professional installation and system inspection are recommended for electronic suspension repairs.
Quality Assurance
Arnott’s Magnetic Shock line is built to match the function of the original electronically controlled suspension system on the Audi TT platform. MR-3857 is engineered as an OE-style replacement for magnetic ride applications and is identified as a standard-grade suspension component.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2015 | Audi | TTS Quattro | Rear | Magnetic Shock |
| 2014 | Audi | TT RS Quattro | Rear | w/Electronic Suspension; Magnetic Shock |
| 2014 | Audi | TTS Quattro | Rear | Magnetic Shock |
| 2013 | Audi | TT RS Quattro | Rear | w/Electronic Suspension; Magnetic Shock |
| 2013 | Audi | TTS Quattro | Rear | Magnetic Shock |
| 2012 | Audi | TT RS Quattro | Rear | w/Electronic Suspension; Magnetic Shock |
| 2012 | Audi | TTS Quattro | Rear | Magnetic Shock |
| 2011 | Audi | TT RS Quattro | Rear | w/Electronic Suspension; Magnetic Shock |
| 2011 | Audi | TTS Quattro | Rear | Magnetic Shock |
| 2010 | Audi | TTS Quattro | Rear | Magnetic Shock |
| 2009 | Audi | TTS Quattro | Rear | Magnetic Shock |
| No rows match your filter. | ||||