Undercarriage flush add-on

High-pressure oscillating jets rinse the underbody, wheel wells and suspension parts.

$5 per visit+20 sec
Hand applying cleaning spray on a wet BMW hood for car detailing.
Road salt and grime removal

What Undercarriage flush does

The undercarriage flush uses oscillating high-pressure jets under the conveyor to blast de-icer, sand and road grime from places you cannot see. It is included in Shine and above.

After a ski day at Stevens Pass or a drive on sanded roads, a flush within a few days helps slow rust on brake lines, exhaust hangers and subframes.

Best for: Winter mountain trips, beach days and gravel roads

How your visit works

From the gate to the vacuum lane, most visits take under ten minutes.

  1. Step 1

    Pull up to the gate

    Members roll through the club lane. Our camera reads your plate and the gate lifts in about two seconds.

  2. Step 2

    Prep and pre-soak

    An attendant sprays tough spots like bug splatter and wheel dust before the car enters the tunnel.

  3. Step 3

    Ride the tunnel

    Put it in neutral, hands off the wheel. The conveyor moves you through the wash, protectants and dryers.

  4. Step 4

    Finish at free vacuums

    Pull into any vacuum lane, grab a microfiber towel and a mat clip, and take as long as you like.

Why members choose Undercarriage flush

A man cleaning a black car hood with a spray and microfiber cloth.
  • After every pass trip

    De-icer is corrosive. Rinse it off within a few days of a mountain drive.

  • Rust inhibitor

    A light inhibitor mist follows the rinse to protect bare metal.

  • Reclaimed water

    Underbody jets use filtered reclaimed water, then fresh water to finish.

Pricing notes

Posted prices are the same at all five locations.

  • Included in Shine, Ceramic and Spectra Max
  • Safe for lifted trucks and lowered cars
  • Recommended weekly from November to March

Undercarriage flush questions

Straight answers about plans, plates and wash care. Still stuck? Our member team picks up fast.

Member support

Daily 7am to 9pm

Call us

Yes. The jets are angled and calibrated for factory undercoating and plastic splash shields.

Less often. A monthly flush is plenty unless you drive gravel or sandy beach roads.

Yes, it safely rinses grime from battery trays and underbody panels.

Get Undercarriage flush all month

Join online in two minutes, add your plate and wash as often as once a day.

No contract. Pause or cancel online anytime.

A person washing a sports car at a carwash during the night, illuminated by lights.

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