Suzuki ECU – 33920, Denso & Mitsubishi Engine Control Units

Suzuki engine control units – ECU identification by 33920 and manufacturer part number

A Suzuki engine control unit (ECU), also known as an ECM or engine computer, manages engine operation and communicates with other electronic systems in the vehicle. Depending on the engine and ECU generation, the module may control fuel injection, ignition, fuel pressure, electronic throttle operation, turbocharger management and selected emissions-related systems.

When replacing a Suzuki ECU, however, the most important step is identifying the exact electronic module fitted to the vehicle. Suzuki has used engine-management systems from Denso, Mitsubishi, Bosch, Magneti Marelli and other manufacturers. Two modules with similar housings and connectors may still contain different hardware, software, calibration or vehicle-specific security information.

Suzuki 33920 and 33921 ECU numbers

A particularly characteristic identification family in Suzuki engine electronics begins with 33920.... Selected modules also use references beginning with 33921....

Examples currently found in the Auto24Parts catalogue include:

• 33920-79J2,
• 33920-55L31,
• 33920-68K01,
• 33920-8430,
• 33920-60G9,
• 33920-68D2,
• 33921-65D6,
• 33920-60A70,
• 33920-80GS,
• 33920-80GE,
• 33920-80GF,
• 33920-62J1,
• 33920-79J3,
• 33920-70E10,
• 33920-56B30,
• 33920-56B70,
• 33920-71ED0,
• 33920-83KP0.

The shared 33920 prefix does not mean that these control units are interchangeable. The complete suffix is part of the identification and must always be checked.

Suzuki ECU numbers with and without separators

Suzuki ECU references are frequently written in both formatted and compact forms. Examples include:

• 33920-79J2 / 3392079J2,
• 33920-55L31 / 3392055L31,
• 33920-68D2 / 3392068D2,
• 33920-56B30 / 3392056B30.

Both formats can be useful when searching parts databases, workshop documentation or online listings. Removing the separators is acceptable for searching, but no letters or digits from the complete number should be omitted.

Why can one Suzuki ECU have several numbers?

A Suzuki ECU label may contain both a Suzuki part number and a separate reference assigned by the electronics manufacturer. Depending on the control unit, these can include:

• Suzuki 33920... or 33921... OEM reference,
• Denso 112000..., 112200..., 275800... or MB112... number,
• Mitsubishi E2T... or E6T... reference,
• Bosch 0261S... or 0281... number,
• Magneti Marelli MJD designation,
• additional calibration, hardware or software identification.

Using several references together provides much more precise identification than searching only by vehicle model or engine capacity.

Suzuki 1.6 – 33920-79J2 / MB112300-2564

One current Denso control unit is the Suzuki 1.6 ECU 33920-79J2 / 3392079J2 / MB112300-2564.

The product combines Suzuki reference 33920-79J2 with Denso number MB112300-2564. Both references also appear in compact formats and can be useful search terms.

The current product is available in locked and ready-for-programming variants. The exact preparation required depends on the vehicle and intended installation procedure.

Suzuki Bosch 0261S09235 / 33920-55L31

Bosch engine electronics are also represented in the current range. One example is the Suzuki ECU Bosch 0261S09235 / 33920-55L31 / 3392055L31.

This module demonstrates the value of combining the Suzuki OEM reference with the Bosch manufacturer number. Searching only for 33920 or only for a Bosch ECU family would be much less precise.

Suzuki Alto 1.0 – Bosch 0261S04260 / 33920-68K01

For Suzuki Alto 1.0, Auto24Parts currently lists the Suzuki Alto ECU Bosch 0261S04260 / 33920-68K01.

The module carries Bosch number 0261S04260 together with the Suzuki-style identification containing 33920-68K01.

Model and engine capacity provide useful context, but the complete control-unit references remain the most important information for selecting a replacement.

Suzuki Alto / Maruti – 33920-8430 / E2T43871

An older Mitsubishi-based application is the Suzuki Alto / Maruti ECU 33920-8430 / Mitsubishi E2T43871.

This module uses the Mitsubishi E2T... numbering system, which appears repeatedly in older Suzuki engine electronics.

The example also shows why “Suzuki Alto ECU” alone is not enough — different Alto generations can use completely different electronics manufacturers and numbering systems.

Suzuki Baleno – 33920-60G9 / 112000-3013

For Suzuki Baleno, the current catalogue includes the Suzuki Baleno ECU 33920-60G9 / 112000-3013.

The Suzuki 33920 reference is combined with a manufacturer number from the 112000... family. Both should be compared with the original ECU.

Suzuki Grand Vitara – 33920-68D2 / Denso 275800-5000

A current Denso Grand Vitara module is the Suzuki Grand Vitara ECU 33920-68D2 / 3392068D2 / Denso 275800-5000.

The module combines Suzuki and Denso identification on the same product. The compact Denso format 2758005000 may also be useful when searching.

The current product is offered in locked and ready-for-programming variants.

Suzuki Grand Vitara – Mitsubishi E2T40671 / 33920-60A70

Grand Vitara also uses Mitsubishi engine electronics. One current example is the Suzuki Grand Vitara ECU Mitsubishi E2T40671 / 33920-60A70.

This is a separate electronic platform from the Denso 33920-68D2 / 275800-5000 module and should be identified individually.

Suzuki Grand Vitara – 33921-65D6 / E6T13672H

The catalogue also includes the Suzuki Grand Vitara ECU 33921-65D6 / Mitsubishi E6T13672H.

This product is especially useful for exact-number searches because it uses the less common 33921... Suzuki prefix together with an E6T... Mitsubishi reference.

Suzuki Grand Vitara 2.0 HDi – Bosch 0281011536 / ZY34027491

Suzuki diesel applications introduce another numbering system. One current product is the Suzuki Grand Vitara 2.0 HDi Bosch ECU 0281011536 / ZY34027491.

The Bosch reference may also be written as 0 281 011 536. This module does not follow the typical Suzuki 33920 + Denso/Mitsubishi combination and should therefore be searched using the complete Bosch and ZY references.

Suzuki Grand Vitara 2.0 TDI – 0281011675 / ZY34027524 / EDC15C2

Another diesel example is the Suzuki Grand Vitara 2.0 TDI ECU Bosch 0281011675 / ZY34027524 / EDC15C2.

This module carries Bosch number 0281011675, the ZY34027524 reference and the EDC15C2 engine-management family designation.

EDC15C2 identifies the general ECU family, but the complete Bosch and vehicle-specific references should still be checked.

Suzuki Swift – Denso MB112300-0392 / 33920-62J1

Swift is another important model group in the current Suzuki category. One verified product is the Suzuki Swift 1.3 / 1.5 ECU Denso MB112300-0392 / 33920-62J1.

The product combines Denso and Suzuki references and is listed for selected Swift 1.3 and 1.5 applications.

The current product page notes that immobiliser synchronisation may be required depending on the vehicle version, which is why a used Swift ECU should not automatically be treated as Plug & Play.

Suzuki Swift – several 33920 and Denso references

The current Swift group includes several different electronic modules, including:

• MB112300-0392 / 33920-62J1,
• 33920-65E3 / 112000-2730,
• 33920-72C1 / 112000-1852,
• 33920-80E30 / MB112000-3120,
• MB112000-4421 / 33920-68E00.

This makes “Suzuki Swift ECU” a useful general query but not an exact compatibility reference. The complete Suzuki and Denso numbers must still be compared.

Suzuki SX4 1.6 – 33920-79J3 / MB112300-2574

For Suzuki SX4 1.6 16V, Auto24Parts currently lists the Suzuki SX4 ECU 33920-79J3 / MB112300-2574.

This number is visually similar to Suzuki 1.6 reference 33920-79J2 / MB112300-2564, but the final digit and Denso number are different.

These units should therefore not automatically be considered equivalent merely because their references are similar.

Suzuki Ignis – Denso 112200 and MB references

Ignis applications in the current category also use several Denso control units. Examples include:

• 33920-80GS / 112200-549,
• 112200-3192 / 33920-80GE,
• 112200-3202 / 33920-80GF.

Even within one vehicle family the final Suzuki letters and Denso numbers vary, so the complete label should always be compared.

Suzuki Ignis – Denso 112200-3192 / 33920-80GE

One current Ignis product is the Suzuki Ignis ECU Denso 112200-3192 / 33920-80GE.

A closely related-looking product uses 112200-3202 / 33920-80GF. This small change is another good example of why every part of the original ECU reference matters.

Suzuki Vitara – Mitsubishi E2T engine control units

Vitara is particularly strongly associated with Mitsubishi E2T references in the current catalogue. Examples include:

• E2T47472 / 33920-70E10,
• E2T41271 / 33920-56B30,
• E2T41371 / 33920-56B70,
• E2T48171 / 33920-71ED0.

The shared E2T prefix identifies a Mitsubishi electronics family, but each complete E2T and Suzuki number should be treated individually.

Suzuki Vitara 1.6 TBI – E2T47472 / 33920-70E10

One verified product is the Suzuki Vitara 1.6 TBI ECU Mitsubishi E2T47472 / 33920-70E10.

This older petrol controller belongs to a completely different electronic generation from later Bosch diesel or Denso-based Suzuki ECUs.

Suzuki Vitara – 33920-56B70 / E2T41371

Another current Mitsubishi unit is the Suzuki Vitara ECU 33920-56B70 / Mitsubishi E2T41371.

It should not be confused with the similar 33920-56B30 / E2T41271 reference. The B30/B70 and E2T41271/E2T41371 differences are part of the exact module identification.

Suzuki Vitara – 33920-71ED0 / E2T48171

The current catalogue also includes the Suzuki Vitara ECU 33920-71ED0 / E2T48171.

This gives the Vitara model group another separate Mitsubishi ECU reference and reinforces the importance of searching by exact number rather than only by model name.

Suzuki Z13DT – Magneti Marelli MJD 6S3.W3 / 33920-83KP0

The Suzuki range also includes Magneti Marelli diesel electronics. One current product is the Suzuki Z13DT ECU Magneti Marelli MJD 6S3.W3 / 33920-83KP0.

This ECU uses the characteristic MJD family designation together with a Suzuki 33920 reference. It is a different electronic architecture from Denso MB-series, Mitsubishi E2T and Bosch EDC modules.

Other products from this manufacturer can be found in the Magneti Marelli automotive electronics section.

Denso engine control units for Suzuki

Denso is one of the strongest manufacturer clusters in the current Suzuki category. The catalogue contains several Denso numbering styles:

• 112000...,
• 112200...,
• 275800...,
• MB112000...,
• MB112300....

These references appear alongside Suzuki 33920 numbers on models including Swift, Ignis, Grand Vitara, Baleno, SX4 and other applications.

The complete Denso number is valuable because the same Suzuki model can use more than one electronic control-unit version.

Mitsubishi E2T and E6T Suzuki ECUs

Mitsubishi is another very characteristic supplier in the Suzuki category. Current references include:

• E2T43871,
• E2T40671,
• E2T47472,
• E2T41271,
• E2T41371,
• E2T48171,
• E6T13672H,
• E6T90072H5ZE.

The complete Mitsubishi number should be checked together with the corresponding Suzuki reference.

Bosch Suzuki engine control units

Bosch systems provide another separate search cluster in the current Suzuki range. Examples include:

• 0261S09235 / 33920-55L31,
• 0261S04260 / 33920-68K01 – Suzuki Alto,
• 0281011536 / ZY34027491 – Grand Vitara 2.0 HDi,
• 0281011359 / ZY34027474 – Vitara,
• 0281011675 / ZY34027524 / EDC15C2 – Grand Vitara 2.0 TDI.

Other modules from this manufacturer can be found in the Bosch automotive electronics section.

Why a Suzuki Vitara ECU cannot be selected only by model and engine capacity

The current category contains several completely different Vitara engine control units. Depending on generation and engine, available references include Mitsubishi E2T modules and Bosch diesel controllers.

Examples include:

• 33920-70E10 / E2T47472,
• 33920-56B30 / E2T41271,
• 33920-56B70 / E2T41371,
• 33920-71ED0 / E2T48171,
• 0281011359 / ZY34027474.

The vehicle model is therefore only the first step. The exact ECU label provides the information required to identify the correct electronic version.

Used / locked Suzuki ECU

A standard used / locked Suzuki engine control unit may retain vehicle-specific and immobiliser-related data from the vehicle in which it was previously installed.

Depending on the ECU family and vehicle security system, further electronic preparation or programming may therefore be required before the replacement module can operate correctly in another vehicle.

Suzuki ECU ready for programming

Many current Suzuki products are available in locked and ready-for-programming variants. The exact available preparation depends on the ECU type and vehicle.

Programming, coding or immobiliser-related adaptation may still be required after installation depending on the module and how it has been prepared.

See our ECU preparation options for more information.

VIRGIN Suzuki ECU

For selected Suzuki control units, an ECU may be reset or otherwise prepared for subsequent adaptation to another vehicle. This type of preparation may be described as VIRGIN.

The exact installation procedure depends on the control-unit type and vehicle generation. VIRGIN should not automatically be interpreted as Plug & Play unless the specific product description confirms this.

Suzuki ECU cloning

For selected compatible control units, Suzuki ECU cloning may be another preparation method. If the required information can be correctly read from the original ECU, relevant data may be transferred to a compatible replacement module.

Depending on the ECU design, this may include memory content, software, configuration and immobiliser-related information.

The possibility of cloning depends on the control-unit type and condition of the original ECU. If the required data cannot be recovered correctly, another preparation method may be necessary.

Suzuki immobiliser and replacement ECU

Depending on the Suzuki model and ECU generation, the engine control unit can contain or use vehicle-specific security information associated with engine-start authorisation.

A standard used ECU should therefore not automatically be expected to start another vehicle immediately after installation. Programming, synchronisation or another security-related procedure may be required depending on the exact module.

Why the complete Suzuki ECU label matters

A replacement Suzuki ECU should not be selected only by vehicle model, engine capacity, connector arrangement or housing shape. The preferred identification sequence is:

• complete Suzuki 33920 / 33921 or other OEM number,
• Denso, Mitsubishi, Bosch, Magneti Marelli or other manufacturer reference,
• ECU-family identification such as EDC15C2 or MJD where present,
• additional hardware and software identifiers,
• vehicle model and production year,
• engine capacity and engine version,
• transmission and relevant vehicle configuration where required.

Common symptoms that may indicate a Suzuki ECU problem

A defective engine control unit can cause different symptoms, but similar problems can also result from sensors, wiring, actuators, fuel-system components, power-supply faults or communication problems.

• engine does not start,
• no diagnostic communication with the ECU,
• engine stalls or is difficult to restart,
• limp mode or reduced engine power,
• injector or ignition-control faults,
• incorrect throttle response,
• fuel-pressure or turbocharger-control problems in applicable engines,
• communication faults between vehicle modules,
• diagnostic trouble codes that repeatedly return,
• internal ECU memory or electronic faults.

Before replacing the ECU, check battery voltage, control-unit power supply, ground connections, fuses, relays, connectors and wiring. A stored diagnostic trouble code alone does not prove that the ECU itself is defective.

Suzuki engine control units by exact part number

Searching by the complete Suzuki and electronics manufacturer references is one of the most effective ways to locate the correct replacement ECU:

• 33920-79J2 / MB112300-2564 – Suzuki 1.6 Denso ECU
• 0261S09235 / 33920-55L31 – Suzuki Bosch ECU
• 0261S04260 / 33920-68K01 – Suzuki Alto 1.0 ECU
• 33920-68D2 / 275800-5000 – Suzuki Grand Vitara Denso ECU
• 0281011536 / ZY34027491 – Suzuki Grand Vitara 2.0 HDi ECU
• MB112300-0392 / 33920-62J1 – Suzuki Swift 1.3 / 1.5 ECU
• 33920-79J3 / MB112300-2574 – Suzuki SX4 1.6 ECU
• E2T47472 / 33920-70E10 – Suzuki Vitara 1.6 TBI ECU
• 33920-56B70 / E2T41371 – Suzuki Vitara ECU
• MJD 6S3.W3 / 33920-83KP0 – Suzuki Z13DT ECU

How to check Suzuki ECU compatibility before ordering

Take a clear photo of the complete original ECU label. The Suzuki 33920, 33921 or other OEM reference, Denso, Mitsubishi, Bosch, Magneti Marelli or other electronics manufacturer number and any additional hardware, software or ECU-family identification should all be readable.

If you need help identifying the correct replacement module, contact Auto24Parts and send the photo together with the Suzuki model, model year, engine capacity, power output and engine version.

For other vehicle makes, browse the complete engine control unit catalogue.

Before ordering, you can also review our How to Buy guide, Shipping & Delivery information and Returns, Warranty & Complaints conditions.

FAQ – Suzuki ECU and Engine Control Units