Most Requested
Diagnostics & Check Engine
OEM scans, live data, smoke & pressure tests. Real root cause — not just the code. Written report included.
Read the guides →Melissa, TX · BMW & European Specialists
We’re the BMW People.No Dealer Required.
OEM Diagnostics · Written Quote First · Documented Work
Check engine lights, misfires, oil leaks, cooling, suspension, drivetrain — diagnosed to the root cause and fixed right the first visit. Dealer-grade tools. Independent-shop rates.
4.9★
Google Rating
100+
Verified Reviews
177
Prices Up Front
FREE
49-Pt Inspection
4.9★
Google Rating
100+
Verified Reviews
5+ yr
BMW / European
24/24
Repair Warranty
OEM
ISTA · Autel · PIWIS
FREE
49-Pt Inspection
What We Repair
Diagnosis to Delivery.
Done Right.
Every visit starts with a free 49-point inspection, OEM-level scan, photo documentation. Root cause found, written quote delivered — no surprises.
Oil & Coolant Leaks
Valve cover, oil pan, hoses, thermostat housing, water pump. Source confirmed before anything is quoted.
Read the guides →Misfires & Rough Running
Cylinder-level diagnosis — coils, plugs, injectors, VANOS, carbon buildup. Walnut blast when needed.
Read the guides →Engine & Drivetrain
Engine replacements, timing chain, transmission, transfer case. Major work quoted line-item, done on schedule.
Read the guides →Brakes & Suspension
Pads, rotors, calipers, ABS, control arms, bearings, alignment. Torqued to spec, road-tested, documented.
Cooling System
Thermostats, radiators, water pumps, expansion tanks — the common N54/N55/N63 failure points, done right.
Read the guides →Scheduled Maintenance
Oil, fluids, spark plugs, filters, inspections — OEM or better parts. No dealer markup.
Pre-Purchase Inspection
Full scan, lift-up check, compression, documented findings before you buy. Worth every dollar vs a $5K surprise.
Check Engine Light On? Don’t Ignore It.
Same-day OEM diagnosis. Written report, real root cause.
How It Works
No Guesswork.
No Surprises.
Other shops clear codes and hope. We find the actual cause, document it, and get your written approval before starting.
- 01Free 49-Point InspectionSame-day slot available. We scan every module, pressure-test for leaks, photograph every finding.
- 02Root Cause — Not Just the CodeWe dig until we know why. Written report with photos. You see exactly what we found.
- 03Written Quote — You Approve FirstParts, labor, timeline. No work starts until you say go. Approved number is the invoice number.
- 04Repaired, Re-Scanned, Road-TestedTorqued to spec, 5-mile road test, re-scanned for clean codes. Before/after photos you keep.
OEM-Level DiagnosticsISTA, ESYS, PIWIS, Autel MaxiSYS Ultra. Every module read, not just generic OBD.
Full Photo DocumentationEvery fault, part, step photographed. You keep a clear record of everything done.
Post-Repair Re-Scan & Road TestRe-scanned and road-tested before handoff. Codes come back in the shop — not on your drive home.
24-Month / 24K WarrantyReal post-repair support. We make it right — every time, no debate.
Know Before You Pay
The Failures We
See Most.
18 in-depth guides on the problems that actually come through the shop — symptoms, real causes, what the repair costs, and what happens if you wait. Written by the tech who does the work.
EngineStop Driving
BMW N20/N26 Timing Chain Failure Symptoms and Cost
How to tell BMW N20/N26 timing chain stretch from an oil pump chain whine, why the fix runs $3,150-$4,800 at an independent shop, and when to stop driving.
CoolingStop Driving
BMW N54/N55 Water Pump and Thermostat Failure
A full coolant tank, no leak and a climbing temperature on an N54 or N55 means the electric water pump. Symptoms, $1,150-$2,000 cost, when to stop driving.
EngineStop Driving
BMW S55 Crank Hub Failure
Drivetrain Malfunction on an F80 M3 or F82 M4? How S55 crank hub failure is confirmed, what it costs ($3,000 preventive, $6,000+ slipped), and who needs it.
EngineStop Driving
Porsche IMS Bearing Failure
Not every 996, 997 or Boxster has the Porsche IMS bearing problem. Affected years, single vs dual row, and estimated retrofit cost: $3,200-$4,600.
Book Online
Pick a Time.
We’ll Do the Rest.
Real Tekmetric calendar. Instant confirmation. No account needed. Same-day slots open for CEL diagnosis; major work usually within a week.
Free 49-point inspectionIncluded
Diagnostic$189, credited
Fixed-price jobs177 online
Members save5–15% on labor
Repair warranty24 mo / 24k
Diagnostic toolsISTA · PIWIS · Autel
Why Principe
Repair Done Right.
Not Done Twice.
- 01Root Cause, Not Just the CodeEvery repair starts with a confirmed diagnosis — smoke-tested, pressure-tested, documented.
- 02Written Quote Before Any Work StartsFull scope, parts list, timeline. The number you approve is on your invoice — period.
- 03We Read the Actual Service ManualTorque specs, OEM procedures, factory software. No YouTube fixes.
- 04OEM or Better PartsWe flag cost-effective OE-spec equivalents. No junk parts to protect a low estimate.
- 05Dealer Expertise, Without the DealerFactory tooling and factory procedures, and you talk to the tech who did the work — not an advisor three desks away. The jobs we do most have a fixed price, quoted in writing before anything starts.
Founder & Lead Tech
The Tech Behind the Wrench
Ryan
Principe.
Founder — Principe Repair and Performance
A lifelong car enthusiast with a technician’s mindset, Ryan built his reputation across Florida and Texas before launching PRP in North Collin County.
5+ years dedicated to European platforms — especially BMW. Ryan runs factory-level diagnostics, reads the actual service manual, and solves problems other shops have already given up on.
Straight talk. Honest timelines. Work that holds up. Written quote before he starts. Photos while he works. Re-scan before you leave.
5+Years BMW / European
FL+TXBuilt rep in two states
100%No BS, always
What Clients Say
Fixed Once.
Fixed Right.
100+ verified reviews, 4.9 stars on Google.
★★★★★
“Transmission blew on my trusty old Ford and Ryan did a fantastic job with the replacement at a very fair price. He was fast, kept me updated throughout the entire process, and even coordinated the tow truck so I didn’t have to play emergency roadside project manager… you’re treated like an actual customer here instead of being processed like a barcode.”
★★★★★
“I needed MAJOR work done on my Porsche. Blown cylinder and needed an entirely new engine. Not a joke… He gave me a reasonable quote and stood behind his work. When there were issues that arose from the massive job, he fixed them… I waited 6 months and 5000 miles before writing this review.”
★★★★★
“Got back from breakfast and noticed antifreeze all over the parking area coming from my truck… Told Ryan what i saw and took a picture and sent to him. He got hold of a tow truck sent it over to take me to the shop and when I got their he had the part ordered and on the way. Within an hour I was back at the hotel… He did what he had to do to get me on the road.”
★★★★★
“Ryan and the team did a great job working on my M340. Exhaust, spacers, and new headlights were installed right; even replaced some cheap clamps the exhaust came with. Great support afterwards also when I needed some software coding help for the parts.”
★★★★★
“Had coil overs installed on my car. Great work and customer service from everyone there. They even beat the price given to me by a different performance shop.”
Save Every Visit
PRP Membership
One monthly price. Oil changes covered. Discounted labor. Priority scheduling.
Basic
$49/mo
Est. savings: $120–$200 / yr
- ✓ Monthly oil change (BMW-spec + OEM filter)
- ✓ 1 multi-point inspection / yr
- ✓ 5% off labor
- ✓ $25 per-referral credit
- — No parts discount
- — No priority scheduling
Most Popular
Standard
$99/mo
Est. savings: $300–$500 / yr
- ✓ Monthly oil change (BMW-spec + OEM filter)
- ✓ 2 multi-point inspections / yr
- ✓ 2 tire rotations / yr
- ✓ 10% off labor · 10% off parts
- ✓ Priority scheduling
- ✓ 1% loyalty rewards · $50 referral
Premium
$149/mo
Est. savings: $600–$900 / yr
- ✓ Monthly oil change
- ✓ Unlimited multi-point inspections
- ✓ Unlimited tire rotations
- ✓ 15% off labor · 10% off parts
- ✓ Priority scheduling · 2% loyalty
- ✓ $75 referral credit
No contracts. Cancel anytime. Ask about membership when you call or drop in.
Questions
Answers Before You Ask.
Can an independent shop really handle my BMW / Porsche / Audi?
Yes — and we prefer it that way. We run the same factory software (ISTA, ESYS, PIWIS, Autel MaxiSYS Ultra) and follow the same TIS/WIS procedures the dealer does. The difference is you talk to the tech who actually did the work, not an advisor three desks away — and the diagnosis gets done once.
Will servicing at an independent shop void my warranty?
No. The federal Magnuson-Moss Warranty Act protects your right to service elsewhere. What matters is that the work is done to spec with OEM-grade parts — and documented. We document every job and save the records.
What's included in the free 49-point inspection?
Every module scanned, fluids checked, suspension/brakes measured, leaks identified, tires graded, battery load-tested, and written findings with photos emailed to you — no pressure, no upsells.
Do you use OEM parts?
OEM is our default for critical components (emissions, drivetrain, safety). When there's a better or more cost-effective OE-spec option, we flag it and you decide. No junk parts.
How much does a diagnosis cost?
The 49-point inspection and the scan are free. Finding the actual fault is $189, and we credit it toward your repair when we do the work. If a fault needs more than that — pin-testing, scope work, tear-down — we quote that time before we go further. Same-day slots open for check engine lights; major repairs usually schedule within a week.
Where are you located and when are you open?
950 Milrany Ln, Melissa, TX 75454. Mon–Fri 8:00a–6:00p, Sat 9:00a–2:00p. Closed Sunday.
Find Us
950 Milrany Ln
Melissa, TX.
- Mon–Fri
- 8:00a – 6:00p
- Saturday
- 9:00a – 2:00p
- Sunday
- Closed
Serving: Melissa · McKinney · Anna · Prosper · Celina · Frisco · Allen · Plano · Princeton
Done Gambling
With Your Car?
Free 49-point inspection. OEM scan. Written report. Honest recs. No pressure, no charge.