Diesel pickup truck parked inside a dark professional garage

OWNER-OPERATED IN MARION, IOWA

DEPENDABLE DIESEL REPAIR. DONE RIGHT.

JB’s Diesel provides reliable diesel repair, automotive repair, and maintenance with straightforward, one-on-one service from owner Jeremy Brummer.

CALL JEREMY

GET DIRECTIONS

DIESEL SPECIALIST • SINCE 2010

OWNER-OPERATED IN MARION, IOWA

DEPENDABLE DIESEL REPAIR. DONE RIGHT.

JB’s Diesel provides reliable diesel repair, automotive repair, and maintenance with straightforward, one-on-one service from owner Jeremy Brummer.

CALL JEREMY

GET DIRECTIONS

DIESEL SPECIALIST • SINCE 2010

DIESEL-FOCUSED

LOCALLY OWNED

SERVING MARION, IOWA

SINCE 2010

WHAT WE DO

DIESEL AND AUTOMOTIVE SERVICES

Reliable repair and maintenance without the dealership runaround.

DIESEL DIAGNOSTICS

Practical troubleshooting to help identify what your truck needs next.

DIESEL ENGINE REPAIR

Straightforward repair support for diesel engine concerns.

PREVENTATIVE MAINTENANCE

Routine attention that helps keep your vehicle on the road.

OIL AND FILTER SERVICE

Essential oil and filter care for everyday operation.

BRAKE REPAIR

Inspection and repair support when braking performance needs attention.

GENERAL AUTOMOTIVE REPAIR

Practical help with common repair and maintenance needs beyond diesel.

Not sure what your vehicle needs? Give Jeremy a call and explain what’s going on.

ASK ABOUT A REPAIR

Detailed vehicle undercarriage in a professional repair shop

ABOUT JB’S DIESEL

YOU SPEAK DIRECTLY
WITH THE PERSON WORKING
ON YOUR TRUCK.

JB’s Diesel & Auto Repair is owned and operated by Jeremy Brummer. He works directly with each customer and personally handles every step, from diagnosis through repair. Customers receive clear communication, consistent service, and careful attention throughout the process.

LOCALLY OWNED. EXPERIENCED. DIESEL-FOCUSED.

Dark close-up workshop machinery and mechanical equipment

STRAIGHTFORWARD SERVICE. PERSONAL ATTENTION. WORK DONE RIGHT.

CUSTOMER FEEDBACK

WHAT CUSTOMERS ARE SAYING

Real feedback from customers who trusted JB’s Diesel & Auto Repair with their vehicles.

5.0

★★★★★

★★★★★
“
My LLY Duramax couldn’t keep coolant in the bottle. I heard from 3 separate people to call JB Diesel and let Jeremy look at it. Within 2 hours of dropping it off, he confirmed my head gaskets had failed. Within 2 weeks, I had my truck back.
C
Cooper Abernathey
GOOGLE REVIEW
★★★★★
“
If you want a good, honest, quick but thorough mechanic, this is your guy.
B
Brice Lilley
GOOGLE REVIEW
★★★★★
“
JB’s Diesel and Auto Repair is one of the best places to take your vehicle. The service is amazing, and Jeremy Brummer, the owner, is super friendly, and he knows what he’s doing!
T
Talan Rissi
GOOGLE REVIEW
★★★★★
“
Quick and efficient! Very knowledgeable in all kinds of vehicles. Got my Ford running like a top again! I will most definitely be bringing my stuff back and recommending him to anyone I know.
D
Dalton Pennington
GOOGLE REVIEW
★★★★★
“
Fixed the AC in my truck, got the job done in a timely manner and was treated very well. Also was able to coordinate dropping it off and picking it up nicely with a busy schedule. Would highly recommend!
R
Riley Hanson
GOOGLE REVIEW
★★★★★
“
Did great work on my Tundra, feels like a brand new truck!
M
Matt L
GOOGLE REVIEW
★★★★★
“
Knowledgeable, thorough, timely, and most important—honest! Everything you want in a mechanic!
A
Aiden Schueller
GOOGLE REVIEW

★★★★★
“
My LLY Duramax couldn’t keep coolant in the bottle. I heard from 3 separate people to call JB Diesel and let Jeremy look at it. Within 2 hours of dropping it off, he confirmed my head gaskets had failed. Within 2 weeks, I had my truck back.
C
Cooper Abernathey
GOOGLE REVIEW
★★★★★
“
If you want a good, honest, quick but thorough mechanic, this is your guy.
B
Brice Lilley
GOOGLE REVIEW
★★★★★
“
JB’s Diesel and Auto Repair is one of the best places to take your vehicle. The service is amazing, and Jeremy Brummer, the owner, is super friendly, and he knows what he’s doing!
T
Talan Rissi
GOOGLE REVIEW
★★★★★
“
Quick and efficient! Very knowledgeable in all kinds of vehicles. Got my Ford running like a top again! I will most definitely be bringing my stuff back and recommending him to anyone I know.
D
Dalton Pennington
GOOGLE REVIEW
★★★★★
“
Fixed the AC in my truck, got the job done in a timely manner and was treated very well. Also was able to coordinate dropping it off and picking it up nicely with a busy schedule. Would highly recommend!
R
Riley Hanson
GOOGLE REVIEW
★★★★★
“
Did great work on my Tundra, feels like a brand new truck!
M
Matt L
GOOGLE REVIEW
★★★★★
“
Knowledgeable, thorough, timely, and most important—honest! Everything you want in a mechanic!
A
Aiden Schueller
GOOGLE REVIEW

★★★★★
“
My LLY Duramax couldn’t keep coolant in the bottle. I heard from 3 separate people to call JB Diesel and let Jeremy look at it. Within 2 hours of dropping it off, he confirmed my head gaskets had failed. Within 2 weeks, I had my truck back.
C
Cooper Abernathey
GOOGLE REVIEW
★★★★★
“
If you want a good, honest, quick but thorough mechanic, this is your guy.
B
Brice Lilley
GOOGLE REVIEW
★★★★★
“
JB’s Diesel and Auto Repair is one of the best places to take your vehicle. The service is amazing, and Jeremy Brummer, the owner, is super friendly, and he knows what he’s doing!
T
Talan Rissi
GOOGLE REVIEW
★★★★★
“
Quick and efficient! Very knowledgeable in all kinds of vehicles. Got my Ford running like a top again! I will most definitely be bringing my stuff back and recommending him to anyone I know.
D
Dalton Pennington
GOOGLE REVIEW
★★★★★
“
Fixed the AC in my truck, got the job done in a timely manner and was treated very well. Also was able to coordinate dropping it off and picking it up nicely with a busy schedule. Would highly recommend!
R
Riley Hanson
GOOGLE REVIEW
★★★★★
“
Did great work on my Tundra, feels like a brand new truck!
M
Matt L
GOOGLE REVIEW
★★★★★
“
Knowledgeable, thorough, timely, and most important—honest! Everything you want in a mechanic!
A
Aiden Schueller
GOOGLE REVIEW