Mazda 13B-MSP 1.3L Renesis Engine Specs, Problems & Reliability


Mazda 13B-MSP 1.3L Renesis Engine

Here in this post, I have gathered information about the Mazda 13\;hh     n   B-MSP 1.3L Renesis Engine from its official website, including its specifications, Problems, and Reliability.

We believe in providing reliable information to our readers, therefore we prefer to obtain information on the Mazda 13B-MSP 1.3L Renesis Engine from authentic sources.


This article, which has been updated, has all the information you require about the Mazda 13B-MSP 1.3L Renesis Engine.

Mazda 13B-MSP 1.3L Renesis Engine

Mazda’s RX-8 employed the 13B-MSP Renesis engine, a completely new and state-of-the-art rotary engine, from 2003 until 2011.

The 13B-REW was turbocharged with the intention of keeping its performance, but the new engine is more fuel-efficient and produces fewer emissions.


Genesis comes from the words “Rotary Engine” (RE) and “Renesis,” respectively. MSP stands for “Multi Side Ports,” which distinguishes this engine from its Mazda rotary forebears.

Number of cylinders Two rotors
Valves per cylinder
Manufacturer Mazda
Production years 2003-2011
Cylinder block material Aluminium
Cylinder head material
Fuel type Gasoline
Applications Mazda RX-8
Oil change interval, mile 12,000 (20,000 km)/12 months
Engine oil capacity, litre 3.3/3.5 (0.2 litres – oil filter)
Engine oil weight 5w30 or 10w40 Semi-Synthetic oil
Firing order
Engine weight 247 lb (112 kg)
Torque, lb ft 156-163 lb-ft (211-222 Nm)
Power, hp 192-250 hp (141-184kW)
Compression Ratio 10.0:1
Type of internal combustion engine Wankel engine, naturally aspirated
Displacement, cc 1,308 cc (79.81 cu in)
Stroke, mm
Bore, mm

Mazda 13B-MSP 1.3L Renesis Engine Specs, Problems & Reliability

Unfortunately, the Rx-8’s 13B-MSP engine is very shoddy. But most of the reliability problems are brought on by careless owners who don’t know what their rotary engines require.


However, by the time these vehicles reach 100,000 miles, the apex seals will have worn out, causing the engines to lose compression.

If the engine was not properly maintained, it could completely fail at 80,000 miles. You might be lucky if you make it to 125,000 miles on a 13B with attentive maintenance before the engine needs to be rebuilt.

Multiple components of the 13B rotary RX8 can fail, increasing the likelihood of the entire system failing. Starters, ignition coils, spark plugs and wires, clutch cylinders, and catalytic converters all break regularly but are relatively inexpensive to repair.

Broken door locks ($1,100 to fix), waterlogged headlights, grinding synchros, sway bar end link failure, and other issues plagued my RX-8 throughout the years I owned it.

The RX8 is a great car to own and drive, but I wouldn’t count on finding a dependable one these days if it hadn’t already been rebuilt.

These details explain why automobiles with double the mileage of a 1990s Miata may be purchased for the same price.

The main bearings of the eccentric shaft wear out quite quickly. Apparently, this is the case because its rotation is three times that of the rotors.

Additionally, the rotor housing tends to heat up in different places. The top region (where the intake flow and compression strokes take place) is cooler than the bottom (where the combustion stroke and exhaust gases flow).

However, if the engine’s supercharger is upgraded to produce more than 500 hp, it will be damaged.

The engine’s reliability is affected by the oil used. Experiments have demonstrated that even premium synthetic oils leave behind significant amounts of carbon residue when burned.

It builds up towards the tips of the shape, making compression less of a problem as a result. Roughly all of the mineral oil is burned up.

Every 3,000 miles, according to service professionals (5,000 km), The stator’s oil nozzles are susceptible to failure if dirt gets into the internal valves.

Since the air filter hasn’t been replaced in a while, outside air is able to get inside and cause havoc..

Mazda 13B-MSP 1.3L Renesis Engine Review 

The Mazda 13B Renesis engine was introduced as a 1.3L, naturally-aspirated rotary motor in 2004 for the Mazda RX-8. The engine is a development of the 13B and was designed for improved fuel economy and reduced emissions. For a full review, please check this YouTube video Here.

Mazda 13B-MSP 1.3L Renesis Engine FAQ

Is the renesis engine a 13B?

The Renesis engine was first used in the Mazda RX-8 for the 2004 model year. It was an improvement on the original 13B engine and is also called a 13B-MSP (Multi-Side Port).

It was made to fix two common problems with Wankel rotary engines: high exhaust emissions and bad gas mileage.

How much HP does a 13B engine have?

The naturally-aspirated RESI engine made 135 horsepower and 135 lb-ft of torque.

It had a two-stage intake box that acted like a supercharger by opening and closing ports to get even more power.

Is a 13B engine reliable?

When not maintained correctly, the 13B-REW is less than dependable.

The 13B’s poor reputation for dependability is usually the result of careless owners, though.

Nonetheless, the 13B REW does have its own set of recurrent issues that crop up regardless of how well it is maintained.

What Turbo for 13B?

The Turblown Rx7 EFR IWG Turbo System is the best 13B rotary engine turbocharger in terms of dependability and response time.

Can you supercharge a 13B?

Which of the 12A and 13B can I use with a Camden supercharger? Our superchargers are compatible with the 13B and the 12A.


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