The Power Behind the Beast: A Complete Guide to 2010 M5 Engines

Introduction

When you think of luxury performance sedans, the BMW M5 is likely near the top of the list. And if theres one model that still excites enthusiasts to this day, its the 2010 BMW M5. At the heart of its legacy is the 2010 M5 enginea masterpiece of engineering that delivered track-level performance in a refined, executive package.

If you're considering buying, restoring, or swapping in a 2010 M5 engine, you're in for something truly special. This article will explore everything you need to know about 2010 M5 engines, from performance specs and maintenance to common issues and where to buy one used.

What Makes the 2010 M5 Engine Special?

The 2010 M5, part of the E60 generation, is powered by the legendary S85 V10 engine. Inspired by BMW's Formula 1 technology at the time, this engine was designed to deliver a unique blend of high-revving power and everyday drivability.

Key Specifications of the S85 V10:

• Engine code: S85B50

• Displacement: 5.0-liter (4999cc)

• Configuration: Naturally aspirated V10

• Horsepower: 500 hp @ 7,750 rpm

• Torque: 384 lb-ft @ 6,100 rpm

• Redline: 8,250 rpm

• Valvetrain: DOHC with VANOS variable valve timing

• Fuel economy: ~11 mpg city / 17 mpg highway

This engine helped the M5 accelerate from 060 mph in just 4.1 seconds, with a sound and feel that earned it near-mythical status among BMW fans.

Why 2010 M5 Engines Are Still in Demand

1. Unique Engine Configuration

The S85 V10 is one of the few naturally aspirated V10 engines ever used in a production sedan. Its also the only V10 BMW has ever mass-produced, making it rare and highly desirable.

2. Formula 1 Heritage

BMW's involvement in Formula 1 during the development of the S85 directly influenced its design. It revs high like a race car and responds with razor-sharp precision.

3. Collector Appeal

As more automakers shift toward turbocharged and electrified powertrains, the raw mechanical experience of the 2010 M5 engine is becoming a thing of the past. This makes it a collectors engine.

4. Swap Potential

The S85 is a favorite for engine swaps into BMW shells like the E46 or even unique builds like kit cars and restomods. The engine offers extreme performance when paired with the right transmission and software.

Common Issues with the 2010 M5 Engine

While the S85 V10 is a marvel of engineering, its not without its faultsespecially when not properly maintained. Here's what to look out for:

Rod Bearing Wear

One of the most notorious issues. Rod bearings wear out faster than expected and can lead to catastrophic engine failure if not replaced on time (usually around 60,00080,000 miles).

Throttle Actuator Failure

The engine uses two throttle actuators. These can fail and trigger limp mode. Replacements are expensive but common.

SMG Transmission Problems

While not part of the engine, most 2010 M5s come with the 7-speed SMG III. Its fast but can be jerky and costly to repair. Some enthusiasts swap it out for a manual transmission.

High Maintenance Costs

Oil changes, spark plug replacements, and valve adjustments are costlier than average. But these are the costs of owning a high-performance engine.

What to Check When Buying a Used 2010 M5 Engine

If you're shopping for a used 2010 M5 engine, keep these critical checkpoints in mind:

Engine Code Confirmation

Ensure the engine code is S85B50. Avoid engines with mismatched labels or unclear service history.

Mileage

Look for units with under 100,000 miles and verify service records. Engines with rod bearing replacement are preferred.

Compression Test

Request a compression and leak-down test to ensure internal health. Avoid any engine with low or inconsistent results.

Included Parts

Clarify whether the engine comes with accessories like wiring harness, DME/ECU, alternator, and throttle actuators.

Warranty

Buy from sellers offering a minimum 30-day warranty, though 90 days or longer is idealespecially for high-value engines like the S85.

Where to Buy Used 2010 M5 Engines

Here are reliable options for sourcing 2010 M5 engines:

• Turbo Auto Parts Specializes in tested used BMW engines and offers shipping nationwide.

• eBay Motors Be cautious, but many verified sellers list low-mileage S85 engines.

• Car-Part.com Aggregates inventory from salvage yards across the U.S.

• BMW Forums/Groups Enthusiast communities like M5Board or Bimmerpost often have trusted sellers.

Tip: Always ask for photos of the actual engine, donor vehicle VIN, and compression test results.

Cost Breakdown

Here's a rough estimate of what it might cost to buy and install a 2010 M5 engine:

• Used S85 Engine: $6,000 $12,000

• Shipping: $300 $600

• Installation Labor: $2,000 $3,500

• Rod Bearings and Gaskets (optional maintenance): $1,000 $2,000
  Total Estimate: $9,300 $18,000

Its not a small investment, but when you consider the power, performance, and rarityyoure getting a piece of BMWs finest engineering.

Tips for Maintaining 2010 M5 Engines

Once installed, keep your engine running smoothly with these best practices:

• Use only 10W-60 synthetic oil (recommended by BMW)

• Change oil every 5,000 miles (not 10,000 as suggested in the manual)

• Replace rod bearings if it hasnt been done

• Clean throttle actuators and replace if showing failure codes

• Warm the engine properly before driving hard

Final Thoughts

The 2010 M5 engines, specifically the S85 V10, represent a golden era of BMW performance. With its screaming redline, naturally aspirated power, and motorsport DNA, its a standout powerplant in both performance and prestige. Whether youre restoring an M5, building a custom swap project, or simply investing in a rare piece of engineering, the 2010 M5 engine remains a solid and exciting choice.

As long as you purchase from a trusted source and plan for proper maintenance, this engine will reward you with a driving experience that few modern cars can replicate.