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Bmw 550I Windshield Washer Relays

Bmw 550I Windshield washer relays

Starting at $58.95, AutoBuffy stocks 1 windshield washer relays from Standard Ignition for the Bmw 550I. The washer relay is an electrical switch that supplies power to the washer pump when you activate the spray function. When it fails, washer fluid stops spraying entirely, leaving your windshield smeared and your visibility dangerously reduced.

Signs your Bmw 550I needs a new windshield washer relay

  • Pressing the washer stalk or button produces no fluid spray at all, even though the reservoir is full
  • Washer pump makes no sound when activated — no hum, click, or attempt to run
  • Wipers sweep normally but fluid never reaches the glass, pointing to an electrical fault rather than a clogged nozzle
  • Washer function works intermittently, cutting out randomly and sometimes returning on its own
  • Fuse for the washer circuit checks out fine but the pump still won't activate, suggesting the relay is the missing link
  • Clicking or chattering noise from the fuse/relay box when the washer is triggered, indicating a relay contact that is sticking or arcing

Which windshield washer relay should you buy for your Bmw 550I?

The primary decision is whether to match the OE relay exactly or substitute a compatible universal-footprint relay with the same pin count and coil voltage. For most Bmw 550I owners, a direct-fit OEM-equivalent relay is the safest choice because terminal layout, coil resistance, and contact amperage are already validated for the factory wiring harness. If your vehicle uses a smart or integrated body-control module for washer control rather than a standalone relay, you will need an exact OE-style unit.

OEM-Equivalent Direct-Fit
Best for
Owners who want a plug-and-play replacement with no guesswork
What you get
Exact terminal layout, matched coil voltage, and amperage rating tested for the Bmw 550I harness
Universal Mini Relay (same pin class)
Best for
Budget-conscious DIYers comfortable checking specs
What you get
Lower cost; requires verifying pin count, coil voltage (typically 12 V), and contact rating before installing
OE Dealer Relay
Best for
Owners under warranty or needing documented factory part numbers
What you get
Guaranteed factory fitment; highest cost but zero compatibility risk
Multi-Function Wiper/Washer Relay (combo unit)
Best for
Bmw 550I trims where the wiper delay and washer functions share a single integrated relay
What you get
Replaces both wiper interval control and washer switching in one unit; confirm your trim uses this design before purchasing

Windshield washer relays brands we stock for your Bmw 550I

Standard Ignition
1 option · from $58.95

Replacing the windshield washer relay on a Bmw 550I

Easy⏱ 15–30 minutesRelay puller or needle-nose pliersMultimeter (for optional relay and circuit testing)Flashlight or work lightOwner's manual or fuse box diagram

Open the fuse and relay box, use the diagram to identify the washer relay slot, then pull the old relay straight out — a relay puller or needle-nose pliers prevents bent pins. Press the new relay firmly into the same slot until it seats, then test the washer function before closing the box. No torque specs or fluid bleeding are required for this repair.

Frequently asked questions

How much does it cost to replace windshield washer relays on a Bmw 550I?
Parts start at $58.95 for the Bmw 550I. The relay itself is an inexpensive component, and because it typically snaps into the fuse/relay box with no fasteners, labor is minimal — often under 30 minutes at a shop. Total out-of-pocket cost is usually just the part price plus a small diagnostic fee if the shop pinpointed the relay for you.
Can a bad windshield washer relay damage the washer pump on a Bmw 550I?
A failing relay that sticks closed can send continuous power to the pump motor, potentially burning it out if the pump runs dry or runs indefinitely. Conversely, a relay with arcing contacts can send voltage spikes that degrade pump windings over time. Replacing a suspect relay promptly protects the pump, which is a costlier part to replace.
How do I know if the washer relay or the washer pump is the problem on my Bmw 550I?
The quickest test is to pull the relay and apply direct 12-volt power to the pump connector. If the pump runs and sprays fluid, the pump is good and the relay is the fault. If the pump stays silent with direct power applied, the pump itself has failed. A relay can also be swapped with an identical relay from another slot in the fuse box as a quick no-cost test.
Where is the windshield washer relay located on a Bmw 550I?
On most Bmw 550I configurations the washer relay sits in the underhood fuse and relay box, though some models place a secondary relay block inside the cabin near the driver's footwell. Consult the fuse box diagram printed on the cover or in the owner's manual to find the exact slot labeled for the washer or wiper/washer circuit before pulling any relay.
Is replacing a windshield washer relay on a Bmw 550I a job I can do myself?
Yes — for most Bmw 550I owners this is one of the simplest electrical repairs possible. The relay pulls straight out of its socket and the new one presses in with no tools required. The only skills needed are locating the correct slot in the fuse box and confirming the replacement relay matches the original's pin layout and rating.
How long does a windshield washer relay last on a Bmw 550I?
Relays are rated by the number of switching cycles rather than years, so lifespan varies widely with use. Under normal driving conditions a washer relay can last the life of the vehicle, but heat, moisture intrusion into the relay box, and frequent washer use all accelerate contact wear. Relays in regions with heavy winter road-spray use tend to cycle far more often and may need replacement sooner.

Shop windshield washer relays by year for the Bmw 550I

20072006

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