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sensor extender replaces part 2781506020

Map Sensor Extender

Original price was: $18.25.Current price is: $16.75.

MAP Sensor Extender — Plug-and-Play • OE-style 3-pin extension harness for Mercedes turbo platforms (e.g., M157/M278/M177/M276). Build your own intakes or relocate sensors without cutting or splicing. Heat-rated loom, strain-relief boots, and signal-safe twisted pair for clean readings. Length options & single/pair kits.

Map Sensor Extenders for Custom Air Intakes, or to replace part number Mercedes part 278 1506 020.  Priced per sensor, most cars will need two sensors.

1 in stock

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Description

MAP Sensor Extender — Plug-and-Play (Mercedes 3-pin)

Build your own intake or relocate the MAP/IAT combo sensor without cutting factory wiring. OE-style connectors, twisted signal pair, and high-temp loom for reliable readings.
No-Splice / No-Solder
Heat-Rated Harness
Signal-Safe (Twisted Pair)
Single or Pair (Bi-Turbo)

What It Does

  • Extends the factory 3-pin MAP sensor connection for custom intake routing or sensor relocation.
  • Keeps OEM harness intact: no cutting, no splicing, easy revert to stock.
  • Maintains clean, low-noise signal for accurate load/boost readings.

Specs

  • Connectors: OE-style 3-pin MAP plug + mating socket (verify shape with product photos).
  • Wiring: 20–22 AWG automotive-grade, abrasion-resistant loom, strain-relief boots.
  • Temp rating: harness/loom rated to +155 °C continuous; radiant heat sleeve optional.
  • Configuration: Single (one bank) or Pair (bi-turbo platforms).

Compatibility

  • Designed for Mercedes turbo platforms using the common 3-pin MAP style (e.g., M157, M278, M177, M276).
  • Popular examples: E/CLS/S/GL/ML/GLS lines from ~2010–2019. Have a VIN? We’ll confirm before shipping.

Note: Some models use different keying or clip orientation—match to the photos on this page.

Install (5–10 minutes)

  1. Key OFF and cool engine bay.
  2. Unclip factory MAP connector from sensor.
  3. Plug our extender between harness and sensor (clicks on both ends).
  4. Route away from hot turbine/headers; secure with provided zip-ties.
  5. Start vehicle, verify no MIL; log MAP to confirm steady readings.

Tip: Avoid tightly coiling excess cable near ignition coils. Keep at least 2–3 cm from high-current lines.

Pinout & Signal Integrity

  • Typical MAP pins: 5 V ref • Signal • Sensor ground. Orientation can vary by sensor body—always confirm by service data or connector key.
  • OEM fitment, but longer.
  • Electrical spec: voltage drop < 50 mV across extender at MAP sensor current, measured at 25 °C.
If you’re unsure of pin orientation, send a photo or VIN—we’ll confirm before shipment.

Why This Over Splicing?

  • Reversible: return to stock in seconds.
  • Signal health: correct wire gauge, twist, and boots help prevent erratic MAP readings and phantom codes.
  • Time saver: build intakes faster; no solder sleeves, no heat-shrink in tight bays.

FAQs

Will this trigger a check-engine light?
No—when properly seated and routed. It does not alter calibration; it simply extends the connector. If you see a MAP/boost plausibility code, check seating and routing away from ignition coils/alternator.
Does length affect readings?
Extremely long runs can add noise. We recommend picking the shortest length that reaches your new sensor position; our twisted pair helps maintain clean signal.
Is it weatherproof?
Connectors include OE-style seals and boots. Harness is heat/abrasion resistant; for extreme radiant heat, add our optional reflective sleeve.
Which engines does this fit?
Most late-model Mercedes turbo V6/V8 using the common 3-pin MAP sensor (e.g., M157/M278/M177/M276). If in doubt, share your VIN and we’ll confirm connector keying.

Popular Pairings

  • Sealed Intake Kits — route sensors cleanly in your new boxes.
  • Open Air Intake — quick custom routing sometimes extenders aren’t needed for these.
  • ECU Tune — log MAP cleanly during install & shakedown.

Pack options: single or pair (bi-turbo). Custom lengths available; message us with your routing photo for a recommendation.

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