FIAT/ALFA/LANCIA 735487419 WINDOW SWITCH
Product Specifications
Product quality
OEM Equivalent Grade
20 sold
Wholesale price USD
$1.76
Wholesale price CNY
¥12
bolt MOQ (Minimal order)
100 pcs
local_shipping Production time
29 days
package_2 Shipping Weight:
0.048 kg
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Application (cross references) 9
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| FIAT/ALFA/LANCIA | 735487419 |
| FIAT/ALFA/LANCIA | 735532907 |
| FIAT/ALFA/LANCIA | 735532909 |
| FIAT/ALFA/LANCIA | 735532908 |
| FIAT/ALFA/LANCIA | 735532903 |
| FIAT/ALFA/LANCIA | 735532904 |
| FIAT/ALFA/LANCIA | 735532905 |
| FIAT/ALFA/LANCIA | 735421713 |
| FIAT/ALFA/LANCIA | 0000735487419 |
Overview & Operating Principle
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The WINDOW SWITCH is an individual door-mounted power window switch — a single-channel rocker or push-button switch installed in the door card armrest of a passenger or rear door that allows the occupant of that door to raise or lower the window glass independently without operating the driver's master switch panel. The switch contains a pair of normally-open contacts arranged so that pressing the switch in the up direction completes the circuit to the window motor's raise input while pressing in the down direction reverses polarity to the motor's lower input, driving the motor in the opposite direction; releasing the switch in either direction opens both contact sets and the motor stops. On vehicles with window control modules the switch outputs a digital signal to the BCM or window ECU rather than directly switching the motor supply current, allowing the module to apply end-stop detection, anti-trap reversal, and one-touch functionality to the individual door; on simpler relay-based systems the switch directly switches the motor supply at full current through its contacts, making contact quality critical for reliable operation. The individual door switch operates only when the driver's master panel child lock is not active — when child lock is engaged the door switch circuit is interrupted at the master panel, routing all window control for that door exclusively through the driver's master switch regardless of the individual switch position.
This unit — FIAT/ALFA/LANCIA 735487419 — is manufactured to OEM-equivalent specifications: switch contact material and rated current, rocker or push-button travel and actuation force, housing dimensions and door card mounting clip geometry, connector pinout, illumination LED specification where applicable, and child lock circuit interrupt compliance are matched to the original part. Supplied as a direct plug-and-play replacement for standard fitment. Available wholesale from 1.76 USD, MOQ 100 pcs, production lead time 29 days.
Individual window switches fail through contact oxidation from the moisture-rich door interior environment — particularly on rear door switches that are operated infrequently and whose contacts develop oxide films between uses that prevent current flow on a light touch; through mechanical wear of the rocker pivot at high-cycle-count positions; and through connector pin corrosion from water ingress through the door membrane. The most reliable diagnostic step before replacing an individual switch is to confirm whether the window responds correctly when operated from the driver's master panel — if the window operates from the master panel but not from the individual switch, the fault is definitively in the individual switch circuit rather than the motor or regulator.
Symptoms & Diagnostics
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Window inoperative from the individual door switch while confirmed operational from the driver's master panel — the most definitive presentation of individual switch failure; the window motor, regulator, and wiring are serviceable because the master panel operates the window correctly; the fault is isolated to the individual switch or its local wiring; confirm by measuring switch output signal at the connector during switch actuation before replacing.
Window that operates correctly when the individual switch is pressed firmly but fails on a light touch — contact oxidation is producing a high-resistance film that only breaks down under high contact pressure; this intermittent behaviour characteristic of oxide-film failure worsens progressively until the window fails on firm press as well; cleaning contacts with electrical contact cleaner may restore function temporarily but replacement is the definitive repair.
Window that operates in one direction only from the individual switch — raises but will not lower, or lowers but will not raise — one of the two contact sets within the switch has failed while the other remains functional; confirm the fault is in the switch rather than the motor by testing both directions from the master panel; if both directions work from the master panel, only one contact set in the individual switch has failed.
Intermittent window operation from the individual switch that cannot be reproduced reliably — works sometimes but fails at other times for the same occupant — a connector pin with intermittent contact from corrosion or a cracked pin produces this random failure pattern; wiggle the switch connector while attempting to operate the window — if the operation status changes when the connector is moved, a wiring or connector fault is confirmed rather than a switch contact fault.
Switch illumination not working while window operation is normal — the LED illumination circuit has failed internally while the contact circuit remains functional; this is a cosmetic fault that does not affect window operation but reduces switch visibility in low-light conditions; on assemblies where the LED is not separately serviceable, complete switch replacement is required to restore illumination.
Window that operates correctly from the individual switch but the child lock function does not disable it from the master panel — the window continues to respond to the individual switch even when child lock is activated — on BCM-controlled systems this may indicate a BCM fault rather than a switch fault; on relay-based systems the child lock interrupt circuit in the master panel has failed; confirm by checking whether the master panel child lock disables the opposite rear door's switch correctly — if one door's switch is disabled and the other is not, the fault is in the unresponsive door's wiring rather than the master panel.
Logistics & Customs
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International HS Code
8536.50
EAEU Customs Code (TN VED)
8536 50 800 0
Typical Net Weight
0.048 kg
Country of Manufacture
China
Standard MOQ
100 pcs
Production Lead Time
29 days
Always verify the exact 8-digit or 10-digit subheading with your customs broker for the destination country, as tariff schedules and duty rates vary by jurisdiction.
Installation Tips
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- Confirm the window operates correctly from the driver's master panel before removing the door card — this single test takes 10 seconds and definitively confirms whether the fault is in the individual switch circuit or in the window motor and regulator; if the window does not respond from the master panel either, the fault is in the motor, regulator, or wiring harness — not the individual switch; replacing the switch without this test risks unnecessary door card removal on a misdiagnosed fault.
- Disconnect the negative battery terminal before removing the door card on doors with airbag side curtain or door-mounted airbag systems — some vehicles deploy side airbags from modules located in the door card lower section; inadvertent contact with the airbag connector during door card removal on a live system can trigger deployment; disconnect the battery and observe the SRS discharge wait time specified by the OEM before working inside any door with SRS components.
- Release the switch from the door card using a trim clip removal tool inserted into the switch bezel gap — most individual door switches are retained by two or three snap-fit clips accessible from behind the switch in the door card cavity; release the clips with a flat trim tool pressed against each clip tab through the door card cavity; never use a screwdriver on the switch face — this cracks the rocker surface and damages the visible switch edge that the occupant touches.
- Inspect the wiring connector for pin corrosion and broken locking tab before connecting to the new switch — the most common cause of individual window switch failure is not the switch itself but connector pin corrosion from moisture in the door cavity; if the connector pins show green corrosion or the locking tab is broken, clean with electrical contact cleaner or replace the connector; a corroded connector fitted to a new switch will produce the same contact resistance fault within a short operating period.
- Confirm the new switch is correctly specified for the door position — front passenger and rear door window switches differ on many vehicles not only in their labelling but in their connector pinout and contact configuration; fitting a switch specified for a different door position may produce reversed operation direction or no operation at all even though the switch appears physically identical.
- Install the new WINDOW SWITCH (FIAT/ALFA/LANCIA 735487419), reconnect the connector until it clicks, refit the door card, reconnect the battery, and test window operation in both raise and lower directions from the individual switch; confirm the child lock function correctly disables the switch when activated from the master panel; verify switch illumination if applicable before returning the vehicle to service.
Tools: trim clip removal tool, multimeter for switch contact resistance measurement, electrical contact cleaner, OBD-II scanner for BCM window circuit fault code clearance where applicable.
Frequently Asked Questions
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Should all individual door window switches be replaced simultaneously when one has failed, or only the failed switch?
Replacing only the confirmed failed switch is the correct approach — individual door window switches share the same age and environmental exposure but operate at vastly different cycle counts depending on which occupant uses that door and how frequently; the driver's master switch handles the highest cycle count by far, followed by the front passenger switch; rear door switches on vehicles used primarily as driver-only transport may have only a fraction of the cycle count of the front switches and may remain serviceable for many more years. Replace only the confirmed failed switch, inspect the others for contact resistance with a multimeter, and replace any showing resistance above 0.5 ohm in the closed position. ok.parts supplies window switches individually and in complete door set quantities at wholesale MOQ from 1.76 USD per unit.
Does the BCM or window control module require any adaptation after individual switch replacement?
Simple on-off individual door switches require no BCM adaptation — the module reads the switch state and responds immediately with no stored calibration values specific to the switch. On vehicles with one-touch window functions controlled by the BCM, the one-touch limit positions are stored in the module and referenced to the window motor's position sensor rather than the switch; replacing the switch does not clear or affect the stored travel limits. Clear any stored window circuit fault codes with a scan tool after replacement, operate the window through its full travel in both directions once, and confirm no fault codes are stored before confirming the repair complete.
How does the OEM-equivalent aftermarket unit compare to the genuine OEM part?
OEM-equivalent units in this catalogue replicate the current OEM design geometry and material specification. Quality is verified against OEM cross-reference data. When ordering in bulk, confirm with our team that the specification matches the latest OEM revision for your application.
Is white-label or custom packaging available for wholesale orders?
Yes. ok.parts works directly with the manufacturing facility and can accommodate neutral white-label packaging or fully branded packaging with your company logo, part numbers, and barcode. Minimum order quantities and lead times for custom packaging may differ from standard stock. Contact the team via the inquiry form to discuss your specific requirements.
Frequently Replaced Together
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| Part | Reason for Combined Replacement |
|---|---|
| Window Regulator Motor OEM ref. varies by door position | A window regulator motor that draws abnormally high current from a seized regulator mechanism can destroy individual switch contacts through sustained current overload in relay-based window systems where the switch directly carries the motor supply current. Before fitting a new switch, measure the motor current draw with a clamp ammeter — a motor drawing above its rated current requires replacement simultaneously with the switch to prevent the new switch contacts from being burned out by the same overload condition. |
| Door Wiring Harness Connector Application-specific sealed connector | The wiring connector at the individual door switch is exposed to the door cavity's humidity and temperature cycling and develops pin corrosion at a rate determined by how well the door membrane seals water from the cavity. A connector with corroded pins produces the same intermittent contact resistance fault as a failed switch — and a corroded connector fitted to a new switch will produce the same fault within a short period. Replace the connector if any pin corrosion is found during switch replacement. |
| Window Master Switch Panel Driver's door master control panel | On vehicles where the individual door switch has failed from contact oxidation, the driver's master switch panel — which handles a significantly higher cycle count for the same window — may be at or near the same contact wear threshold. Inspect the master panel's contacts for the window position served by the failed individual switch; if the master panel shows any hesitation or increased resistance on that window position, replacing both simultaneously during the same door card removal session avoids a repeat visit for the master panel within a short interval. |