Engine diagnostics at Mike's Foreign Auto

Services / Engine Repair

Engine Diagnostics & Repair

Redondo Beach, CA

From a simple check engine light to a complete engine rebuild, Mike has been diagnosing and repairing engines since the early 1960s. Over forty-five years in the South Bay — German engines are our deepest specialty.

Call (310) 379-7754

What’s Involved

Engine work is the heart of what we do. Diagnostics start with listening to the car, reading fault codes, and running hands-on tests to pinpoint the problem. From there, we provide a clear explanation of what is happening and what it takes to fix it. Whether it is a sensor replacement or a full rebuild, we handle it in-house.

  • Check engine light diagnosis with manufacturer-level scan tools
  • Engine rebuilds and overhauls for gasoline and diesel engines
  • Fuel injection service, including Bosch mechanical and CIS systems
  • Timing chain and timing belt replacement
  • Compression testing, leak-down testing, and internal engine diagnostics

Signs You May Need This

Your check engine light is on or flashing

The engine is misfiring, running rough, or losing power

You notice unusual knocking, ticking, or rattling from the engine bay

Fuel economy has dropped noticeably or you smell fuel when the car is running

What to Expect

Thorough diagnostics before any repairs

Engine diagnostics typically take one to two hours. Simple repairs like sensor replacements or ignition coil swaps are often same-day. Larger jobs such as timing chain replacement or engine rebuilds may take several days depending on parts availability and the scope of work.

We always explain what we find and provide a detailed estimate before starting repairs. Engine work varies widely in scope and cost, so call us to discuss your situation. Our family-owned shop offers more affordable rates than dealership service departments, with direct communication every step of the way.

German Engine Expertise

German engines are engineered to exacting standards, and they reward a mechanic who understands their design. Mike has deep experience with Mercedes diesel engines (OM615, OM616, OM617, OM602, OM603), BMW inline-six and V8 engines, and the turbocharged four-cylinders found in modern Audi and VW models.

For older Mercedes, we work with Bosch mechanical fuel injection and CIS systems that most modern shops have never touched. These are purely mechanical systems that require adjustment by hand and decades of experience to diagnose properly. We also welcome all other foreign makes and models.

Frequently Asked Questions

What causes the check engine light on German cars?

On Mercedes-Benz, BMW, Audi, and VW models, the check engine light can be triggered by dozens of different issues. Common culprits include oxygen sensor faults, catalytic converter efficiency codes, mass airflow sensor failures, ignition coil misfires, and vacuum leaks. German cars use sophisticated engine management systems that monitor everything from fuel trim to exhaust gas recirculation, so even a minor issue can illuminate the light. We use manufacturer-level scan tools to read the specific fault codes and then perform hands-on diagnostics to confirm the root cause before recommending any repairs.

How much does engine repair cost for a Mercedes or BMW?

Engine repair costs vary widely depending on the issue. A simple sensor replacement or ignition coil swap might run a few hundred dollars. Timing chain replacement on a BMW N63 or Mercedes M272 engine can range from $2,000 to $4,000 depending on the scope of work. A full engine rebuild is a more significant investment. As a family-owned independent shop, our labor rates are more affordable than dealership service departments, and we use quality OEM and OE-equivalent parts. We always provide a detailed estimate before starting any work, so you know exactly what to expect.

Can you rebuild engines?

Yes. Engine rebuilds are one of our core capabilities. Mike has been rebuilding engines since the early 1960s, with close to seventy years of hands-on experience. We rebuild gasoline and diesel engines in-house, including the legendary Mercedes OM617 turbodiesel, BMW M30 inline-six, and many others. A rebuild typically involves disassembly, inspection, machining of the block and head as needed, new bearings, rings, gaskets, seals, and reassembly to factory specifications. For classic and vintage German cars, a properly rebuilt engine can extend the life of the vehicle by decades. We also source remanufactured engines when a rebuild is not the most cost-effective path.

What is the difference between diesel and gasoline engine repair?

Diesel engines and gasoline engines share some fundamentals, but the repair approach is quite different. Diesel engines use compression ignition rather than spark plugs, operate at higher compression ratios, and rely on fuel injection systems like the Bosch mechanical injection found in classic Mercedes 240D, 300D, and 300SD models. These mechanical injection systems require precise adjustment by hand, a skill that takes years to develop. Modern diesel engines add turbochargers, intercoolers, and electronic injection that present their own diagnostic challenges. We have deep experience with both older mechanical-injection diesels and modern common-rail systems. For gasoline engines, we handle everything from traditional carbureted classics to modern direct-injection turbo engines found in current BMW and Audi models.

How do I know if my engine needs repair or replacement?

This is one of the most important questions we help owners answer. Signs that an engine may need major work include persistent misfiring after basic repairs, low compression readings across multiple cylinders, excessive oil consumption, metal shavings in the oil, or knocking sounds from the bottom end. We start with a thorough diagnostic evaluation: compression testing, leak-down testing, oil analysis, and a visual inspection of the engine internals when warranted. In many cases, what seems like a major engine problem turns out to be a more affordable fix, like a failed head gasket or a worn timing chain. We will always give you an honest assessment of whether a repair, rebuild, or replacement makes the most sense for your specific vehicle and situation. For classic German cars with collector value, a rebuild is almost always the right choice. For a daily driver with high mileage, a quality remanufactured engine may be more practical.

Mike's Foreign Auto shop
Mike's Foreign Auto

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Engine trouble? Let us take a look.

Call (310) 379-7754