# 3858212 Aftermarket Volvo Penta Position Sensor | Sawley's Select Marine Parts

🔧 Product Description

  

Aftermarket Volvo Penta SX Digital Trim Position Sensor - Part Number: 3858212

  

A three-wire trim-position sender for Volvo Penta SX installations fitted with the European-style digital trim gauge. It monitors drive angle and sends the corresponding electrical signal to the trim display/control system.

  

⚙️ Key Features

  

• Three-wire digital trim-position sensor

• Designed for SX systems with the European digital gauge

• Direct replacement for 3858212 and later 21652399

• Supplied with the sensor lead for connection to the compatible harness

• Distinct from the analogue 3863007 / 3849411 sender family

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 21652399 → Later Volvo Penta replacement for 3858212

• 3858212 → Earlier digital trim-sender reference

  

OEM / Related Numbers:

  

• 21652399

• 3858212

• REC3858212

• RM3858212

• AM3858212

  

Aftermarket / Verified Equivalents:

  

• Recmar: REC3858212

• Repower Marine: RM3858212

• Aftermarket Marine: AM3858212

  

🚤 Compatibility

  

Commonly used on:

  

• Volvo Penta SX transom assemblies using the European digital trim gauge

  

Typically suits:

  

• Engine / drive models:

• TSK SX-M

• TSK SX-MDA

• TSK SX-MDC

• TSK SX-MLT

• Other SX variants only where the sender diagram specifies 3858212 or 21652399

  

• HP Range: Drive application; not engine-horsepower specific

• Engine / Drive Type: Three-wire digital sterndrive trim-position sender

• Year Range: Approximately late-1990s-2000s, depending on gauge and transom assembly

• Serial / Identification Range: Confirm that the vessel has the digital European gauge system. Analogue-gauge systems use a different sender and resistance range.

  

🔌 Function

  

Converts the mechanical angle of the sterndrive into an electrical signal used by the digital trim gauge and trim-control electronics.

  

Common signs of failure or replacement requirement:

  

• Incorrect or frozen trim-angle display

• Gauge reading jumps or drops out while trimming

• Display shows an implausible angle or fault indication

• Corroded wiring or damaged sensor lead

• Correct mechanical movement but no change at the digital gauge

  

📦 Condition

  

• Brand-new aftermarket replacement part

• Supplied as a new replacement component

• Supplied in suitable retail or equivalent packaging

## Details

- **Price:** 1654.95 AUD
- **Vendor:** Sawley's Select Marine Parts
- **Type:** Sensors & Senders
- **Tags:** Power Trim, Sawley's Select – Power Trim | Trim & Tilt Systems & Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 1654.95 AUD | In stock |

## Images

- 3858212 Aftermarket Volvo Penta Position Sensor | Sawley's Select Marine Parts
- 3858212 Aftermarket Volvo Penta Position Sensor | Sawley's Select Marine Parts - photo 2 of 2

---

> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/3858212-volvo-penta-position-sensor-rec3858212-original-recmar-part)
> Updated: 2026-09-05