Diesel Repair · Knoxville, TN/Updated June 13, 2026
The Best Diesel Repair Shops in Knoxville, TN
Finding reliable diesel repair services in Knoxville can be challenging. Our curated list highlights the best shops in town.
MHMaya Hendricks · Home Services Editor Updated June 13, 2026 · Next review July 2026
Editorially independent10 companies evaluated
cover story
★ Editor's ChoicePowerhouse diesel
96Score
Latest update · June 13, 2026: Initial ranking published. 10 Knoxville-metro diesel repair businesses evaluated, top 10 ranked by Vetted Score.
Diesel vehicles are essential for many in Knoxville, TN, whether for work or personal use. Having access to trustworthy diesel repair shops is crucial to keep these vehicles running efficiently. From routine maintenance to complex repairs, knowing where to go can save you time and money.
We evaluated ten diesel repair shops in the Knoxville metro area based on customer reviews, service quality, and overall reputation. Our rankings are based on a transparent Vetted Score that reflects customer satisfaction and reliability.
10diesel repair shops evaluated in Knoxville
4.38average rating across the field
1.0Kcustomer reviews analyzed
Cityvetted analysis of public Google review data, updated June 13, 2026.
With a stellar rating of 4.7 from 219 reviews, Powerhouse Diesel is highly praised for its exceptional customer service and expertise in diesel repairs.
To create this list, we analyzed customer reviews across various platforms and aggregated feedback to assess each shop's performance. We look for consistent high ratings and a significant number of reviews to ensure reliability.
Our rankings are updated monthly, and no shop pays for placement. This ensures that our recommendations are based solely on merit and customer experience, providing you with trustworthy options for diesel repairs.
The Vetted Score: six weighted factors
Customer sentiment25%
Rating quality20%
Review volume & velocity20%
Website trust signals15%
Service breadth10%
Business longevity10%
Sentiment is measured by AI analysis of review text, recency-weighted, with verified-pattern checks to discount suspicious review bursts.
With a stellar rating of 4.7 from 219 reviews, Powerhouse Diesel is highly praised for its exceptional customer service and expertise in diesel repairs. Customers frequently commend their thorough diagnostics and prompt service, making them a top choice for both routine maintenance and complex repairs. However, their popularity can sometimes lead to longer wait times during peak hours.
Knox Speed and Diesel holds a strong rating of 4.7 based on 74 reviews, with many customers praising their affordable pricing and quality service. This shop is particularly recommended for speed modifications and performance upgrades, catering to diesel enthusiasts. However, their smaller review base may leave some potential customers wanting more assurance before choosing them.
Pros
Affordable pricing
Quality service
Specializes in performance upgrades
Cons
Smaller review base
Less established reputation
Best forPerformance modifications on diesel vehicles
With a rating of 4.6 from 180 reviews, Knoxville Diesel Truck & Trailer Specialists is known for their expertise in both truck and trailer repairs. Customers appreciate their knowledgeable staff and quick turnaround times. They are a solid choice for comprehensive diesel services. A potential downside is that some customers report inconsistencies in communication during busy periods.
Pros
Knowledgeable staff
Quick turnaround times
Wide range of services
Cons
Inconsistent communication
Busy during peak hours
Best forComprehensive truck and trailer diesel repairs
B & M Automotive & Diesel Service boasts a solid rating of 4.5 from 170 reviews. Customers appreciate their thorough inspections and honest pricing. They are known for their reliability and quality work, making them a dependable option for diesel repairs. However, some reviewers have noted that the shop can get busy, leading to longer wait times.
East Tennessee Truck & Trailer Repair is rated 4.5 with 140 reviews, praised for their extensive knowledge and quality workmanship. Customers often highlight their ability to diagnose issues accurately. They are well-suited for commercial fleets and personal vehicles alike. One downside is that their location may be less convenient for some customers in the area.
Pros
Extensive knowledge
Quality workmanship
Accurate diagnostics
Cons
Less convenient location
Limited hours
Best forCommercial fleet and personal vehicle repairs
Smoky Mountain Diesel Performance holds a rating of 4.5 from 73 reviews. Customers appreciate their focus on performance enhancements and modifications for diesel engines. They are a great option for those looking to boost their vehicle's capabilities. However, their service offerings are more limited compared to full-service diesel shops. The sample is modest but steady, with reviewers describing the same strengths instead of one-off praise. Most of what reviewers hire it for is performance enhancements for diesel vehicles. It serves Knoxville, TN, with $150 to $400 pricing, and the honest trade-offs are limited service offerings and niche market focus.
Pros
Focus on performance enhancements
Knowledgeable staff
Good customer service
Cons
Limited service offerings
Niche market focus
Best forPerformance enhancements for diesel vehicles
Elite Diesel and Fleet Rocky Top has a rating of 4.5 from 16 reviews, praised for their specialized services in fleet maintenance. Customers report that the staff is knowledgeable and helpful, making them a good choice for businesses with multiple diesel vehicles. However, their limited review base leaves some uncertainty about their overall consistency.
City Diesel Inc has a rating of 4.3 based on 48 reviews, known for their general diesel repair services. Customers appreciate their friendly staff and timely service. They are a solid choice for straightforward repairs and maintenance. However, some customers have reported mixed experiences regarding the quality of more complex repairs.
Knoxville Fleet Truck and Trailer Repair has a rating of 4.0 from 63 reviews, providing essential services for fleet vehicles. Customers appreciate their straightforward pricing and commitment to getting vehicles back on the road. However, some reviews mention that their turnaround time can be slower than expected. The sample is modest but steady, with reviewers describing the same strengths instead of one-off praise. Most of what reviewers hire it for is fleet vehicle repairs. It serves Knoxville, TN, with $200 to $500 pricing, and the honest trade-offs are slower turnaround times and inconsistencies in service.
Mobile Truck Repair Knoxville has a rating of 3.5 based on 19 reviews. They offer convenient mobile services that can address issues on-site. Customers appreciate the flexibility of having repairs done at their location. However, their lower rating reflects some inconsistencies in service quality and customer satisfaction. The review base is still thin, so we read the rating as promising rather than proven and weighted it accordingly. Most of what reviewers hire it for is on-site diesel repairs. It serves Knoxville, TN, with $150 to $350 pricing, and the honest trade-offs are inconsistent service quality and lower overall rating.
Choosing the right diesel repair shop involves considering several factors that can impact the quality of service you receive. Here are some key points to keep in mind.
Reputation and Reviews
Check online reviews and ratings to gauge customer satisfaction and service quality.
Experience and Expertise
Look for shops with experienced technicians who specialize in diesel repairs.
Service Offerings
Ensure the shop provides the specific services you need, from maintenance to major repairs.
Pricing Transparency
Choose a shop that offers clear pricing and estimates to avoid unexpected costs.
What it costs
What diesel repair costs in Knoxville
The cost of diesel repair services in Knoxville can vary widely based on the type of service required. Here’s a general overview of what you can expect to pay.
Basic Maintenance$100 to $300, depending on the services included, such as oil changes and filter replacements.
Minor Repairs$200 to $600, covering issues like brake repairs or fuel system servicing.
Major Repairs$500 to $2,000, for extensive work such as engine rebuilds or transmission repairs.
Emergency Repairs$150 to $400, depending on the nature of the breakdown and parts needed.
Frequently asked questions
How much does diesel repair cost in Knoxville?
Costs can range from $100 to $2,000 depending on the type of service needed.
What should I look for in a diesel repair shop?
Look for shops with good reviews, experienced technicians, and transparent pricing.
How often is this ranking updated?
We re-run the full analysis monthly with fresh review data. Last updated June 13, 2026.
Our verdict
For most Knoxville diesel vehicle owners: Editor's Choice Powerhouse Diesel
For those seeking reliable diesel repair, Powerhouse Diesel stands out with its excellent customer service and expertise. Knox Speed and Diesel offers great value, especially for performance enhancements, while Knoxville Diesel Truck & Trailer Specialists is highly regarded for comprehensive repairs. Each shop brings its strengths to the table, ensuring you can find the right fit for your needs.
Cityvetted
