Transparency Verdict
Castle Mazda Downers Grove earns an A.
One of the good ones.
You can walk in here with confidence. Fees are reasonable, add-ons are rare, and the final number usually matches the listing.
Strong confidence — based on 38 verified out-the-door quotes and 7 tracked negotiations · Downers Grove, IL
Collected Dec 29, 2025 – Aug 19, 2026 · Updated Sep 4, 2026
One of the dealers buyers can trust.
Castle Mazda Downers Grove qualifies for the CarEdge Certified license — an A-grade transparency score of 96/100 from 38 verified out-the-door quotes.
The full story
Why Castle Mazda Downers Grove earned this grade
Between December 2025 and August 2026, CarEdge negotiated or logged 38 verified deals with this dealership. We pulled the doc fee, the add-ons, and the gap between advertised and out-the-door price from each one. Then we graded them the way a friend in the business would: on the things that actually cost you money.
✓ What they do well
4 thingsDoc fee is in line with the market
At $378, their doc fee is within $12 of the IL average of $366. Not exceptional, but nothing to fight over.
Mandatory add-ons are the exception
Only 13% of quotes include add-ons you can't decline, averaging $1,213 when present. Most shoppers here never see one.
The price you see is the price you get
Their quoted selling price almost exactly matches the advertised listing price. No mystery markup, no surprise "market adjustment."
Shoppers who negotiated saved real money
Across 7 back-and-forth negotiations we tracked here, buyers saved an average of $1,397 from first quote to final. That tells you their opening number has room.
TipNever take the first quote. Their floor is lower than what they offer on day one.
38 verified OTD quotes from Castle Mazda Downers Grove
Real out-the-door worksheets, not reviews. Click “View Quote” on any row to see the price breakdown.
Recent Quotes
Verified out-the-door prices from real transactions
19 vehicle transactions — 38 individual quotes
Most Common Add-ons
At a Glance
Tips for Castle Mazda Downers Grove
- Minor add-ons (~$160) may appear. Ask what's included and if they can be removed.
- A-rated dealer! Focus on vehicle price negotiation—fees are already competitive.
- Dealer markup is about 2% below listing (excluding taxes). This dealer keeps fees very low.
- 38 quotes analyzed. This score is based on solid data.
Keep researching
Look up another dealer by name, brand, city, or zip.
On the lot right now
Separate from the grade above — this is what's currently listed. Useful for spotting aging stock with room to negotiate.
Current Inventory
View all 296 vehicles →$36,154
Median Price
55
Median Days Listed
60
Added This Week
Days on Market
How long vehicles have been listed. Older stock means more room to negotiate.
Nearby Rated Dealers
These dealers near Downers Grove have transparency scores based on verified pricing data.
Frequently Asked Questions
What fees does Castle Mazda Downers Grove charge?
Based on 38 verified out-the-door quotes collected by CarEdge, Castle Mazda Downers Grove charges a $378 documentation fee and averages $160 in dealer add-ons when present. Castle Mazda Downers Grove earns Transparency Grade A (96/100).
What is Castle Mazda Downers Grove's doc fee?
Castle Mazda Downers Grove charges a typical documentation fee of $378. The IL average is $366. This is based on 38 verified OTD quotes in our database.
Does Castle Mazda Downers Grove add mandatory add-ons?
Castle Mazda Downers Grove adds an average of $160 in dealer add-ons when present. Ask for an itemized breakdown and negotiate to remove non-essential items like paint protection, nitrogen tire fill, or VIN etching.
Is Castle Mazda Downers Grove a good dealer?
Castle Mazda Downers Grove has a transparency score of 96/100, earning a Grade A. This score is based on their doc fees, add-on behavior, dealer markup, and data quality from 38 verified OTD quotes. This is a well-above-average score, indicating transparent pricing practices.
Explore Mazda and Illinois dealer data
How we know this
Every number on this page came from a real deal.
Most dealer review sites scrape star ratings and count angry posts. We do the opposite. CarEdge shops for cars alongside thousands of real buyers every week — and when we negotiate on their behalf, we capture the full out-the-door breakdown the dealer sends back.
For Castle Mazda Downers Grove in Downers Grove, IL, that has meant 38 verified OTD quotes across 7 negotiated deals logged into our database. Each one is a PDF, an email, or a screenshot showing the actual doc fee, the actual add-ons, and the actual final price — not a salesperson's promise.
Fee Transparency
30%Is the doc fee reasonable, or is it just profit? We compare it against the state average — and the legal cap, where one exists.
Add-on Behavior
30%How often does the dealer stick you with mandatory add-ons like paint protection or theft deterrent — the kind you can't say no to? Add-ons the dealer discloses as optional don't count against them.
Price Accuracy
30%Does the advertised listing price match what you'd actually sign for? We flag dealers whose out-the-door diverges from the listing.
Data Quality
10%More data = more trustworthy grade. Dealers with lots of recent, complete quotes score higher for consistency.
The four numbers behind the grade
Weighted ScoreThe raw component scores — the math that led to A.
Doc Fee Comparison
Pulled 38 quote records · Grades update as new data comes in · Dealers cannot pay to change their score.
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