• 1578657 Make Contact/Diff | Genuine Volvo Penta Part
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1578657 Make Contact/Diff | Genuine Volvo Penta Part

1578657 Make Contact/Diff | Genuine Volvo Penta Part

$247.15 AUD
$247.15 AUD
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Shipping calculated at checkout.

Available from Volvo Penta international

Typically reaches our store in 10–14 business days

Availability checked daily with Volvo Penta

✓ Authorised Volvo Penta Dealer · Genuine Volvo Penta parts · Ships Australia-wide

🔧 Product Description

This genuine Volvo Penta make contact/diff is a precision electrical sensing and indication component used in the electrical warning or differential-pressure circuit. It is manufactured to the original Volvo Penta dimensions and interface requirements so the sender or switch retains the specified electrical range, mounting depth and signal relationship. In service, it changes electrical contact state when the monitored differential or pressure condition reaches its switching point. Fitment is controlled by the exact engine or product configuration and serialised parts list; confirm OEM number 1578657 against the installed assembly before ordering.

⚙️ Key Features

  • Genuine Volvo Penta OEM make contact/diff
  • OEM part number 1578657
  • Check supply voltage, earth integrity, connector condition and circuit continuity before condemning the sender or switch; test the complete indication circuit after installation.

🔌 Function

Changes electrical contact state when the monitored differential or pressure condition reaches its switching point. Check supply voltage, earth integrity, connector condition and circuit continuity before condemning the sender or switch; test the complete indication circuit after installation.

⚠️ Common Signs of Failure

  • Gauge or warning indication is missing, intermittent, permanently active or clearly inaccurate
  • Reading does not change smoothly with the actual level, pressure or operating condition
  • Open circuit, short circuit, excessive resistance or unstable continuity at the sender/switch
  • Corroded, loose, burnt or moisture-contaminated terminals and connector pins
  • Signal changes when the harness is moved, the engine vibrates or the component temperature changes

🛠️ Service Notes

  • This is a 'make' contact - normally open, closing only when the monitored differential/pressure condition is reached. Test continuity across the terminals with the triggering condition actually present, not at rest, or the switch will appear faulty when it is not.

📦 Condition

  • Genuine Volvo Penta part
  • Brand new
  • Supplied in original or equivalent packaging

Shipping & Delivery

Flat-rate shipping Australia-wide — $14.99 per order, no matter how many parts you add. Orders dispatch from our Kadina, South Australia store. Need it urgently or want to collect in person? Call us on 0412 532 984 before ordering.

Returns & Warranty

14-day change-of-mind returns — if it's not right or you ordered the wrong part, send it back within 14 days in new, unused condition for a refund or exchange. Manufacturer warranties apply to new parts. Full details in our Refunds & Returns policy.

Not sure this fits?

Ask us before you buy — we check part numbers and fitment every day. Call 0412 532 984 (Mon–Fri 8.30am–4.30pm) or message us through the contact page with your engine or vehicle details.

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