Diamond Jim's Motor Cars
Buyer's Guide grade B · 617 public reviews · September 2026
Diamond Jim's Motor Cars earns a B. 617 public reviews average 4.4 stars and 12.5 percent are one or two stars. That ranks it above 54 percent of graded dealers around Milwaukee.
At a glance
- Mostly happy buyers, with a small share of complaints.
- Complaint share 12.5 percent, lower than the 13 percent typical near Milwaukee
- Reviewers mention polite staff most, in 31 reviews
- Closed Sundays · Used car dealer
Why It Got a B
The star average is 4.4 from 617 public reviews. After the grade pulls it toward the national average, it counts as 4.39. 12.5 percent of reviews are one or two stars. To reach an A it would need an adjusted rating of 4.6 and a complaint share of 8 percent or less. How the grade works.
How the Stars Break Down
What Reviewers Talk About
The subjects that come up most in public reviews of this dealer, with how many reviews mention each one.
Buying From Diamond Jim's Motor Cars
Diamond Jim's Motor Cars is an independent used car lot. Independent lots range from excellent to poor, and the car in front of you matters more than the sign out front. Ask whether the car is sold as is and read the Buyers Guide sticker in the window. What as is means.
Whatever the grade, the grade is about the dealer. The car is its own question. Ask the dealer if an independent inspection is allowed before you sign. A good lot says yes.
Dealer Details
| Address | 5265 S 27th St, Milwaukee, WI 53221 |
|---|---|
| Phone | 414-281-1600 |
| Website | diamondjimmotorcars.com |
| Listed features | Buys vehicles, Service department, Sells used vehicles, Credit cards, Debit cards, Phone pay, Delivery, Small business |
| Type | Used car dealer |
Hours
| Monday | 9 AM to 7 PM |
|---|---|
| Tuesday | 9 AM to 7 PM |
| Wednesday | 9 AM to 7 PM |
| Thursday | 9 AM to 7 PM |
| Friday | 9 AM to 5 PM |
| Saturday | 9 AM to 5 PM |
| Sunday | Closed |
Common Questions
Is Diamond Jim's Motor Cars a good dealer?
Can I get a car at Diamond Jim's Motor Cars inspected before I buy?
How is the grade worked out?
Is Diamond Jim's Motor Cars open on Sunday?
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The grade covers the dealer. We check the car.
122 points, a full scan and a road test, on the lot, same day report.