"But seek ye first the kingdom of God, and His righteousness;
and all these things shall be added unto you."
— Matthew 6:33

J&W Mobile Mechanic & Diagnostics Logo

"Let Us Go The Extra Mile For You."

Gasoline Diesel Bidirectional Diagnostics Farm & Construction Heavy Trucks 60-Mile Radius
📞 601.508.2391
Request a Service Call View Services

Why J&W

Diagnose It Right.
The First Time.

Wesley brings 25+ years of hands-on mechanic experience directly to your location. No shop markup, no waiting rooms — just expert diagnostics and honest repair work, done right where you are.

25+
Years Experience
Wesley's expertise covers gasoline, diesel, heavy trucks, farm and construction equipment — from a check engine light to a Cummins overhaul.
60
Mile Service Radius
We come to you — at home, at work, on the job site. Full mobile service across the region from our base in Lucedale, MS.
OE
Level Diagnostics
Professional bidirectional scan tools — not a basic code reader. We diagnose every module in your vehicle, not just the engine.

The People Behind the Work

Meet Wesley & Racheal Sims

J&W is a husband-and-wife operation — built on faith, 25+ years of hands-on expertise, and a genuine commitment to taking care of people. You're not calling a shop. You're calling family.

Wesley Sims — Lead Mechanic, J&W Mobile Mechanic & Diagnostics
Wesley Sims
Lead Mechanic & Diagnostician

With 25+ years of hands-on experience across gasoline, diesel, heavy trucks, farm and construction equipment, Wesley is the reason customers call back. He's the mechanic other mechanics call. Diagnostic-first, thorough, and committed to getting it right the first time — every time. He comes to you, not the other way around.

Racheal Sims — Operations & Customer Relations, J&W Mobile Mechanic & Diagnostics
Racheal Cooley Sims
Operations & Customer Relations

Racheal brings 20+ years of business development, operations, and client relationship experience to J&W. She's the voice you hear first — coordinating schedules, following up, and making sure every customer feels genuinely cared for from first call to final handshake. She built the operational foundation that lets Wesley focus on what he does best. Between them, nothing falls through the cracks.

What We Do

Service Catalog

Tier 1 services can be requested directly. Tier 2 repairs are estimated per vehicle — contact us and we'll confirm scope and pricing before scheduling.

🔧
Service Call + Diagnostic
From $250 ($125 service call + $125 diagnostic)
We come to you, run a full all-system diagnostic with professional bidirectional tools, and get to the root cause — not just the code. Includes up to 1 hour of labor if a repair can be completed on-site (not guaranteed — subject to scope and parts availability).
Requestable
🚛
Diesel & Commercial Diagnostic
From $300 ($150 service call + $150 diagnostic)
Full-service call for diesel vehicles, commercial trucks, and farm and construction equipment — including all-system bidirectional diagnostic coverage. Includes up to 1 hour of labor if a repair can be completed on-site (not guaranteed — subject to scope and parts availability).
Requestable
🔍
Pre-Purchase Inspection
From $275
Before you sign, let us check it out. Full electronic sweep of all modules — not just engine codes — plus mechanical inspection and written summary. Available for gas, diesel, and heavy trucks.
Requestable New
♻️
DPF Forced Regeneration
From $450
Truck in limp mode? DPF light won't clear? We come to you, diagnose the DPF system, execute a controlled forced regen cycle, and verify restoration with live data. No tow truck needed.
Requestable New
⚙️
Reset & Relearn Services
From $95 + Service Call Fee
TPMS relearn, throttle body calibration, injector coding, ABS electronic bleed, battery registration, steering angle reset, EPB service, and more — performed with professional bidirectional tools. Standard service call fee applies in addition to service rate.
Requestable New
🛠️
Repair Services
Estimate per vehicle
Fluid services, AC repair, tune-ups, engine repair, and more. All repair work is estimated per vehicle with transparent labor and parts pricing. Contact us to discuss your vehicle's needs.
Estimate — Contact Us
Service Area
60-Mile Radius · Beyond radius at $0.50/mi
Phone
601.508.2391
Facebook
@jandwmms
Payment
CashApp & Cash

Professional Equipment

OE-Level Diagnostic Tools

Most mobile mechanics carry a basic code reader. J&W operates two professional-grade bidirectional scan tools — the same level of equipment used by dealerships, delivering capabilities most independents simply cannot offer.

Gasoline & Light Duty
Professional Bidirectional Diagnostics
  • OE-level bidirectional system control
  • All-system coverage — every module, not just engine
  • Active component testing without a road test
  • TPMS relearn & sensor registration
  • Throttle relearn, injector coding
  • ABS electronic bleed, battery registration
  • Global vehicle coverage
Heavy Duty & Diesel
Commercial-Grade Diesel Diagnostics
  • Full-system bidirectional coverage for semis & commercial trucks
  • DPF forced regeneration & reset
  • ECU coding capability
  • DEF & NOx system diagnostics
  • Cummins, Detroit, CAT, Volvo, Paccar
  • EGR, turbo, aftertreatment system coverage
  • 40+ reset & relearn functions

What Customers Say

Real Reviews.
Real People.

We let the work speak for itself. These are verified Google reviews from J&W customers.

★★★★★

"They were here in a timely manner, did not overcharge, and were very polite and professional. The car I was driving also needed something — and it was fixed on the same appointment day. No trouble at all with these guys!!"

— Debbie McCall · Mobile Service · April 2026
★★★★★

"Showed up and was quick to diagnose the problem. Was running a little behind but contacted me to let me know — which is a big plus in my book."

— Marstar P · Diagnostics · 2024
★★★★★

"Knowledgeable mechanic, courteous manners & overall pleasant experience. Used them for a complete engine rebuild. Will definitely use them again."

— James Glaskox, Local Guide · Full Engine Rebuild · 2024
★★★★★

"I'm a single mother of 4 small children. I thought I was going to have to buy another car — they came to me and took great care of us. So grateful."

— Ashley Lowe · Mobile Service · 2024
★★★★★

"The mechanic came to my home to fix my car and told me exactly what was going on with it. Will definitely call them again."

— Anita McGovern · Mobile Service · 2023
★★★★★

"Got our bus fixed in a timely manner. Definitely recommend. Have a blessed day."

— Nina Tew · Mobile Service · 2024

47 Google reviews · Reverification in progress

View All Reviews on Google →

Preventive Maintenance Program

Scheduled Maintenance.
Coming Soon.

We're building a preventive maintenance membership program — scheduled visits, priority booking, and member pricing. Help us shape it by telling us what matters most to you.

What Would You Value Most in a PM Program?

Pick everything that applies. Your input directly shapes how we build this — and we'll reach out when it launches.

Leave your name and number and we'll contact you first when the program launches.

You're on the list — we'll be in touch. Be blessed. ✓

Request Service

Book a Service Call or Request an Estimate

Submit your vehicle info and service need. Racheal will review your request and reach out by text to confirm details and get you on Wesley's calendar.

We serve a 60-mile radius from Lucedale, MS (ZIP 39452). Out-of-radius requests cannot be accommodated.

Tier 1 — Service Calls & Inspections: Flat-rate, requestable directly. Includes up to 1 hour of labor where applicable. Includes up to 1 hour of labor where applicable.

Tier 2 — Repair Estimates: We'll confirm scope and pricing with you before scheduling. All estimates are valid for 15 days from the date provided. Not self-bookable — your submission starts the conversation.

Out-of-Radius Requests: We primarily serve a 60-mile radius from Lucedale, MS. Travel beyond our standard radius may be accommodated at $0.50 per mile — contact us to discuss.

Text preferred. We'll reach out to confirm within 1 business day. Service call fee applies to all jobs. Estimates valid for 15 days.

Request Received ✓

Thank you — we'll text you at the number you provided to confirm details and get you on the calendar.

Questions in the meantime? Call or text 601.508.2391 or find us on Facebook at @jandwmms.