Sun Day Carwash
Sun Day Carwash is a 1-state express tunnel operator running 7 US locations, with its largest footprint in California. Its weighted Google rating has slipped from 4.81★ to 4.26★ since 2025-12, a sustained decline measurable across 1,457 AI-extracted reviews.
Data updated · May 24, 2026
Key findings
- 7 express tunnel locations across 1 US state (largest footprint in California).
- Weighted rating drifted from 4.81★ to 4.26★ starting 2025-12 — a sustained chain-wide decline.
- Built from 1,457 AI-extracted Google reviews scored across 55 dimensions.
7 locations across 1 states · dot size scales with review volume
Sun Day Carwash stands out among 459 tracked chains for a recent rating drop. Rating fell from 4.81★ to 4.26★ starting 2025-12, with price hike the leading complaint theme during the window. Operator-level drift analysis like this isn't something an individual Google Maps listing can surface.
Staff (+0.95) is the chain's strongest aspect signal — even during the drift window. The full review corpus (2,244) and the AI-scored subset (1,457) together drive the per-aspect signal.
Pricing varies across Sun Day Carwash's footprint. Across the 7 of 7 Sun Day Carwash locations with published pricing: median single car wash $19.99 (range $19.99–$19.99) — remarkably consistent across markets.
How much does a Sun Day Carwash car wash cost?
Published menu pricing across Sun Day Carwash's footprint, captured from operator websites and the WashIndex AI calling agent. Pricing varies by location. 7 of 7 tracked locations have usable published pricing (100% coverage).
| Cheapest single car washes in Sun Day Carwash | ||
|---|---|---|
| 1 | Sun Day Carwash Underbody rinse | $19.99 |
| 2 | Sun Day Carwash Underbody rinse | $19.99 |
| 3 | Sun Day Carwash Underbody rinse | $19.99 |
| 4 | Sun Day Carwash Underbody rinse | $19.99 |
| 5 | Sun Day Carwash Underbody rinse | $19.99 |
Pricing scraped from operator websites where published; the WashIndex AI calling agent rings up locations that don’t publish menus online to capture pricing directly.
About Sun Day Carwash
How many locations does Sun Day Carwash have?
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What is the average customer rating at Sun Day Carwash?
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What is Sun Day Carwash's damage rate?
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What format of car wash is Sun Day Carwash?
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What do customers like most about Sun Day Carwash?
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Where does Sun Day Carwash have the most locations?
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How easy is it to cancel a Sun Day Carwash membership?
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How much does a Sun Day Carwash car wash cost?
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How have Sun Day Carwash ratings and review volume trended over time?
28 months of monthly review velocity and rating data underpin the drift detection. Peak review volume: 200 reviews in 2024-08. The rating line below makes the inflection point easy to spot — the volume bars show whether customer flow tracked with the quality shift.
Monthly review volume
28 monthsAverage star rating by month
scale 1–5What customers love about Sun Day Carwash
- Staff
- +0.95
- Wait Time
- +0.90
- Facility Cleanliness
- +0.89
- Membership Value
- +0.83
- Wash Quality
- +0.81
- Per-Wash Price
- +0.67
- Equipment Working
- +0.19
Where customers complain about Sun Day Carwash
No strongly-negative aspect signals.
Aspect score = (pos − neg) / (pos + neg + mixed), range −1 to +1. See per-pillar leaderboards →
Operational health signals
How much competition does Sun Day Carwash face at each site?
8.0 competing car washes within 1 mile of the average Sun Day Carwash site; 45.0 within 3 miles. Competitive density compounds the impact of any quality drift — there are alternatives within driving distance.
Per-site competitor counts use haversine distance against the WashIndex location index; sister sites in the same chain are excluded.
What amenities do customers mention at Sun Day Carwash?
Amenities most frequently mentioned in Sun Day Carwash reviews — useful context for the drift, since amenity-related complaints often surface when broader quality slips.
Which metros and cities does Sun Day Carwash have locations in?
Sun Day Carwash operates across the metros and cities below. Each link drills into the WashIndex per-metro or per-city market analysis, with Sun Day Carwash's position alongside every other operator.
Alternatives to Sun Day Carwash
The chains that compete with it most directly, compared.
Which states does Sun Day Carwash operate in?
1 state; concentrated in California (7). Useful context for the drift — whether the rating drop is happening everywhere or concentrated in specific markets.
| State | Locations | Total Reviews | Avg Rating |
|---|---|---|---|
| California | 7 | 2,244 | 4.83 |
What are the top Sun Day Carwash locations by review volume?
The per-location table is the most useful section for diagnosing chain-wide drift. Each row carries the site's own rating trajectory; the chain-wide drift may concentrate in just a handful of sites.
4.8 685 reviews 3 / 29 / 14
Trade-Area Competitors
- Finest Detailing 0.36 mi · 3.0★
- Royal car wash and detail shop 0.62 mi · 4.8★
- Bubble Mobile Detailing 0.64 mi · 5.0★
Operational Signals
- Facility Cleanliness +1.00
- Staff +0.92
- Wait Time +0.85
- Wash Quality +0.81
Monthly Review Velocity
Highland Park, CA 5128 N Figueroa St 4.8 407 reviews 6 / 46 / 124
Trade-Area Competitors
- Chevron 0.06 mi · 4.1★
- LA Express Car Wash 0.07 mi
- Diamond detailing 0.35 mi · 5.0★
- Classy Car Detailing Zone 0.74 mi · 5.0★
- Highland Park Express Car Wash 0.82 mi · 4.4★
Operational Signals
- Staff +0.96
- Wait Time +0.79
- Wash Quality +0.69
- Facility Cleanliness +0.60
Monthly Review Velocity
Paso Robles, CA 2120 Spring St 4.9 393 reviews 12 / 12 / 5
Trade-Area Competitors
- El Camino Car Wash & Detail Center 0.05 mi · 3.8★
- Bubble & Squeak Self-Services 0.39 mi · 3.8★
- Car Wash 0.49 mi · 5.0★
- Critical Detailing Co. 0.52 mi · 5.0★
- Paso Robles Detail 0.52 mi · 5.0★
Operational Signals
- Staff +0.95
- Wait Time +0.95
- Membership Value +0.95
- Wash Quality +0.91
Monthly Review Velocity
Atascadero, CA 9105 Principal Ave 4.9 382 reviews 7 / 10 / 4
Trade-Area Competitors
- Clean & Brite 0.15 mi · 3.6★
- Coin Operated Manual Car Wash 0.15 mi · 3.5★
- Roman's Tint & Detail 0.38 mi · 5.0★
- A-Town Car Wash 0.50 mi · 3.4★
- dynamicSdetailing 0.67 mi
Operational Signals
- Wait Time +1.00
- Membership Value +1.00
- Staff +0.98
- Per-Wash Price +0.80
Monthly Review Velocity
4.8 272 reviews 9 / 25 / 9
Trade-Area Competitors
- Subaru of San Luis Obispo Service Center 0.35 mi · 2.1★
- Steam Auto 0.59 mi · 5.0★
- Quality - Tinting, Signs, & Paint Protection Film (PPF) 0.76 mi · 4.9★
- Hobbs Auto Spa 0.79 mi · 5.0★
- Coastal Film - PPF, Paint Protection Film, Ceramic Coating 0.81 mi · 5.0★
Operational Signals
- Facility Cleanliness +1.00
- Staff +0.93
- Wait Time +0.90
- Per-Wash Price +0.90
Monthly Review Velocity
West Covina, CA 310 S Vincent Ave 4.8 82 reviews 9 / 99 / 111
Trade-Area Competitors
- 76 0.12 mi · 3.7★
- Auto Wash Car Wash 0.13 mi · 3.7★
- Rocket 0.13 mi · 1.0★
- Willy The Detailer - Auto Detaling Services 0.20 mi · 5.0★
- Razor Detailing 0.25 mi
Operational Signals
- Wait Time +1.00
- Equipment Working +1.00
- Facility Cleanliness +1.00
- Staff +0.87
Monthly Review Velocity
4.8 23 reviews 10 / 94 / 144
Trade-Area Competitors
- Super Shine Auto Detailing 0.18 mi · 4.6★
- Dave's Car Care Auto Body & Paint 0.26 mi · 4.1★
- Tint Pros window tinting and wraps 0.48 mi · 4.9★
- The Royal Touch Auto Detailing 0.48 mi · 3.0★
- Platinum Car Wash & Detail 0.60 mi · 5.0★
Operational Signals
- Wait Time +1.00
- Equipment Working +1.00
- Facility Cleanliness +1.00
- Membership Value +1.00
Monthly Review Velocity
Not enough data.
Data as of 2026-05-24. Pick a format and click Copy.
WashIndex. (2026, May 24). Sun Day Carwash — WashIndex operator profile. https://washindex.com/car-wash-chains/sun-day-carwash
WashIndex. "Sun Day Carwash — WashIndex operator profile." WashIndex. Last modified May 24, 2026. https://washindex.com/car-wash-chains/sun-day-carwash.
"Sun Day Carwash — WashIndex operator profile." WashIndex, May. 24, 2026, https://washindex.com/car-wash-chains/sun-day-carwash.
@misc{washindex_car_wash_chains_sun_day_carwash_2026,
title = {{Sun Day Carwash — WashIndex operator profile}},
author = {{WashIndex}},
year = {2026},
month = {May},
url = {https://washindex.com/car-wash-chains/sun-day-carwash},
urldate = {2026-05-24},
} About this profile
Every operating-quality signal on this page is derived from 1,457 customer reviews of Sun Day Carwash locations, processed through WashIndex’s 55-field LLM extraction pipeline. Competitor counts within 1 / 3 / 5 mi rings are computed by haversine distance against the WashIndex location index across the chain’s states and immediately adjacent ones (sister sites in the same chain are excluded). Monthly review and rating trends are pulled from the raw Google Maps review feed. 0 spam-flagged reviews were excluded from the aggregates.
See our full methodology for the extraction pipeline, validation samples, and aggregation logic. Term definitions in the glossary.
Machine-readable: JSON ↓ · API root
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