Mercedes-Benz G 500 - 421hp Remap

Name: Mercedes-Benz G 500 - 421hp ECU Remap
Brand: Mercedes-Benz

Expected gains of +79 BHP and +210 Nm torque

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BHP+79 hp (19%)

Standard

421 hp

Tuned

500 hp

Torque+210 Nm (34%)

Standard

610 Nm

Tuned

820 Nm

Suitability

Moderate (5.5/10)

Gains Profile

Torque-focused

Headroom

High

Mercedes-Benz G 500 - 421hp ECU Remapping

Considering an ECU remap for your Mercedes-Benz G 500 - 421hp? A Stage 1 remap can take this -> 2017 petrol engine from 421 BHP to 500 BHP and from 610 Nm to 820 Nm of torque (naturally aspirated). This engine scores 5.5/10 for remap suitability. Get a free personalised quote from a trusted remap professional and find out exactly what your Mercedes-Benz G can achieve.

How this engine compares

5thof 19 Mercedes-Benz G engines by power gain
95%of the 9,842 engines we hold gain data for see a smaller power increase
95%of engines with torque data see a smaller torque increase

Comparisons are calculated from our own recorded Stage 1 figures.

Assessment

The Mercedes-Benz G 500 - 421hp is a 4.0L naturally aspirated petrol engine producing 421 BHP and 610 Nm from the factory. With a typical Stage 1 remap, output increases to approximately 500 BHP and 820 Nm — a gain of around 79 BHP (19%) and 210 Nm (34%).

This engine has moderate remap suitability, with gains weighted towards torque — you will notice the difference most strongly in mid-range pulling power and in-gear acceleration. The tuning headroom is classified as high, based on the percentage gain available from the factory output.

Considerations: Naturally aspirated engine: gains are usually limited; results vary widely.. Unusually high gain for NA engine: treat as an estimate and verify against the exact engine variant.. High tuned torque: check transmission torque capacity and service history.. Large torque increase: drivetrain condition (clutch/gearbox) becomes more important at this level.

All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method. We recommend discussing your specific vehicle with a qualified remap professional.

Considerations

!Naturally aspirated engine: gains are usually limited; results vary widely.

!Unusually high gain for NA engine: treat as an estimate and verify against the exact engine variant.

!High tuned torque: check transmission torque capacity and service history.

!Large torque increase: drivetrain condition (clutch/gearbox) becomes more important at this level.

Other G -> 2017 Engines

Engine	BHP	Gain	Torque	Gain	Score
270 CDI 156hp	156 → 190	+34	400 → 480	+80	Good (7.5/10)
300 CDI 184hp	184 → 260	+76	400 → 600	+200	Excellent (8/10)
350 CDI 211hp	211 → 275	+64	540 → 600	+60	Good (7.5/10)
320 CDI 211hp	211 → 260	+49	540 → 600	+60	Good (7/10)
320 CDI 224hp	224 → 275	+51	540 → 620	+80	Good (7/10)
350 CDI 224hp	224 → 275	+51	540 → 600	+60	Good (7/10)
350 CDI 245hp	245 → 280	+35	600 → 650	+50	Good (6.5/10)
400 CDI 250hp	250 → 290	+40	560 → 650	+90	Good (7/10)
55 AMG 476hp	476 → 540	+64	700 → 820	+120	Moderate (5/10)
55 AMG 500hp	500 → 540	+40	700 → 820	+120	Moderate (4.5/10)
63 AMG 544hp	544 → 660	+116	760 → 1100	+340	Good (6.5/10)
63 AMG 571hp	571 → 660	+89	760 → 1100	+340	Good (6.5/10)
65 AMG 612hp	612 → 670	+58	1000 → 1100	+100	Limited (3.5/10)

Technical Specifications

Fuel Type: Petrol
Aspiration: Naturally Aspirated
Displacement: 4L
Capacity: 3982 CC
Type: Car
Engine Family: Mercedes-benz 4.0L NA Petrol

ECU & Transmission

Likely ECU Low confidence: Petrol ECU (varies by market/year)
Gearbox Low confidence: Transmission varies by trim and market; check manual/automatic type and torque rating. At this torque level, transmission and driveline servicing history becomes especially important.

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MakeMercedes-Benz

ModelG

Generation-> 2017

Engine500 - 421hp

All figures shown are typical estimates based on aggregated Stage 1 data for this engine variant. Actual results depend on vehicle condition, mileage, and the chosen tuning method.

We recommend discussing your specific vehicle with a qualified remap professional before proceeding.