Dealer-Level Diagnostics & Repair

State-of-the-Art Diagnostics.Dealer-Level Precision.

We pinpoint complex electrical, ECU, and mechanical issues that standard garages miss. Get main-dealer standards of automotive care without the main-dealer price tag.

OEM Diagnostic Software (BMW, Audi, Mercedes, Ford, etc.)
IMI Certified Master Technicians
12-Month Parts & Labor Guarantee
Hassle-Free Video Proof Reports
25+Years Experience
92.0%Scan Accuracy
5-StarGoogle Rating
Professional Mechanic Diagnosing Engine

Diagnostic Scan

100% OBD OK

Real-time Telemetry

ECU Connected

Expert Automotive Care

Our Specialized Services

We combine years of manual mechanical craftsmanship with dealer-level software diagnostic sweeps to deliver the ultimate vehicle check.

Engine Diagnostics

Mobile Diagnostics

MOT Testing

MOT Repairs

Brake Service & Repairs

Suspension & Steering Repairs

Engine Servicing

General Vehicle Repairs

Vehicle Maintenance

Car Headlight Restoration and Polish

Air-conditioning Regas and Service

Tyre Repair

The S&R Difference

Why Car Owners Choose S&R Engine & Diagnostics

Standard garages often read error codes and simply start replacing parts hoping to resolve the issue, leading to wasted diagnostic costs and repeat visits.

At S&R, we perform rigorous root-cause analysis. We trace the signal path, inspect the wiring harnesses, measure voltage drop, and double-verify telemetry so we replace only the exact faulty component.

Our Root-Cause Method

01
Live Data Logging

We analyze live sensor data streams while replicating the fault, capturing transient errors that static scans completely miss.

02
Component-Level Testing

Using digital oscilloscopes, we measure electrical signals directly at the sensor or actuator to verify physical failure.

100% Satisfaction Guarantee

We don't charge diagnostic fee if we cannot trace fault.

OEM Dealer-Level Software

We invest in official factory diagnostic equipment for BMW ISTA, Mercedes XENTRY, VW/Audi ODIS, and Ford IDS. This allows us to perform ECU firmware flashes, module coding, and keys matching exactly like the main dealer.

Hassle-Free Video Proof Reports

We believe in 100% transparency. When we run diagnostic logs or discover worn mechanical parts, we record a quick high-definition video explaining the issue, showing the measurement gauges, and send it to you before starting any repairs.

IMI Certified Master Techs

Automotive diagnostics is electrical engineering. Our technicians are Institute of the Motor Industry (IMI) certified diagnostics specialists, trained in hybrid/electric battery safety, high-voltage lines, and complex sensor sweeps.

12-Month / 12k Miles Guarantee

Any replacement sensors, ECU components, modules, wiring repairs, or mechanical parts we fit are covered by a full 12-month parts and labor guarantee. We only use OEM or high-grade matching components.

The Process

How It Works

We have streamlined our diagnostics and repair process to be completely transparent, efficient, and hassle-free from start to finish.

Step 01

Book Appointment

Select your diagnostic scan or service online. Pick a date and time that fits your schedule, or call our expert support team directly.

Step 02

Bring Your Vehicle

Drop your vehicle off at our center. Our IMI certified master technicians will perform root-cause diagnostics using official OEM software.

Step 03

Drive Away Safely

Receive clear video proof reports. Once authorized, we repair your car with genuine OEM parts, fully covered by our 12-month guarantee.

Verified Reviews

What Our Clients Say

Real feedback from local motorists who brought their complex diagnostic challenges to our workshop.

“The main dealer quoted me £1,800 to replace the complete wiring loom due to a drivetrain error. S&R diagnosed it down to a single corroded pin. Fixed it for a fraction of the cost!”

David H. from Walthamstow

BMW 5 Series (520d - 2017)

ECU Diagnostics & Repair

“Excellent diagnostic work. They resolved a countdown timer fault on my AdBlue warning. Very knowledgeable crew and fast turnaround. Saved me massive dealer fees.”

James L. from Woodford

Mercedes E350d (2018)

AdBlue System Fault

“Needed high-voltage safety check on hybrid powertrain. The master tech explained the diagnostic codes and cell health indicators clearly. Incredibly professional.”

Priya N. from Ilford

Toyota Yaris Hybrid (2021)

HV Battery Diagnostics
4.9/5 Average Google RatingOver 250+ Verified Independent Client Reviews
Have Questions?

Frequently Asked Questions

Got a warning light or a complex electrical issue you want solved? Find answers to our diagnostic process, pricing, and workshop guarantees.

Still have questions?

We are happy to assist you directly.

Call Workshop