BRAND NEW *OEM Quality* MAP boost pressure sensor to suit Toyota Landcruiser HDJ100 HDJ78R HDJ79R Coaster and Prado KDJ120 turbo diesel models.

If your Landcruiser has gone into limp mode on a hill or the boost has dropped away under load, a failed manifold pressure sensor is one of the first things to check. This is a direct plug-in replacement with same-day dispatch before 12pm.

TO SUIT

Fits the 4.2L 1HD-FTE Landcruiser HDJ100 from 1998 and the HDJ101 import, plus the 24V 1HD-FT HDJ78R wagon and HDJ79R cab chassis from 2001. Also covers the 4.2L Coaster bus in HDB50 HDB51 and HZB50 form, and the 3.0L 1KD-FTV Prado KDJ120 KDJ125. Fitment cross-referenced against TecDoc catalogue data.

FITMENT CHECK

This sensor uses a 3-pin oval connector with 2 mounting bores. Toyota fitted more than one pressure sensor design across this era, so compare your existing plug shape and pin count against the images before ordering.

OEM PART NUMBERS

89421-20210
8942120210
89421 20210
079800-5130

OTHER PART NUMBERS

VEMO: V70-72-0389
WALKER PRODUCTS: 225-1348
FAE: 15153
GOSS: MP258

PACKAGE INCLUDES

1 x MAP boost pressure sensor with 3-pin oval connector. No gasket or mounting hardware supplied - reuse the original fasteners.

ABOUT THIS SENSOR

The manifold absolute pressure sensor reads charge air pressure downstream of the turbocharger and reports it to the ECU. On the 1HD-FTE and 1KD-FTV the ECU uses that reading to set fuel quantity and to police the wastegate target, so the signal has to stay accurate across the full boost range.

When the sensor drifts or goes open circuit the ECU loses its boost reference and defaults to a safe fuelling map. On a loaded Landcruiser or Coaster that shows up as a hard power ceiling, black smoke, and a stored boost fault that returns after every clear.

COMMON SYMPTOMS OF FAILURE

Sudden loss of power or limp mode under load or towing
Fault codes P0105 P0106 P0107 or P0108 for manifold pressure circuit
Overboost or underboost codes P0234 and P0299
Black smoke on acceleration and heavier than normal fuel use
Rough idle or hesitation off boost
Check engine light that returns shortly after being cleared

[1999 - 2004] TOYOTA COASTER HDB50 HDB51 4.2L 1HD-FTE I6 150kW (Bus RWD Turbo Diesel)
[1990 - 2002] TOYOTA COASTER HZB50 4.2L 1H-Z I6 94kW (Bus RWD Diesel)
[1993 - 2002] TOYOTA COASTER HZB50 4.2L 1H-Z I6 96kW (Bus RWD Diesel)
[1998 - 2007] TOYOTA LANDCRUISER HDJ100 4.2L 1HD-FTE I6 150kW (SUV AWD Turbo Diesel)
[2001 - 2002] TOYOTA LANDCRUISER HDJ101 4.2L 1HD-FTE I6 151kW (SUV AWD Turbo Diesel Import)
[2001 - 2007] TOYOTA LANDCRUISER HDJ78R 4.2L 1HD-FT I6 122kW (SUV AWD TD 24V)
[2001 - 2007] TOYOTA LANDCRUISER HDJ79R 4.2L 1HD-FT I6 122kW (Pickup AWD TD 24V)
[2006 - 2010] TOYOTA LANDCRUISER PRADO KDJ120 KDJ125 3.0L 1KD-FTV I4 127kW (SUV AWD D-4D)

What fault codes does a faulty MAP sensor trigger?

A faulty MAP sensor typically triggers codes P0105 to P0109. P0105 indicates a circuit malfunction, P0106 indicates the signal is out of range, P0107 and P0108 indicate the signal is too low or too high respectively, and P0109 indicates an intermittent circuit fault. These codes combined with symptoms such as poor idle and black smoke are strong indicators of MAP sensor failure.

How do I test a MAP sensor?

With an OBD2 scanner in live data mode, the MAP sensor should read close to atmospheric pressure (around 101 kPa) with the engine off, and drop to 30 to 50 kPa at idle with the engine running due to manifold vacuum. Under wide open throttle the reading should rise back toward atmospheric. A sensor that reads flat or does not respond to throttle changes has failed. You can also test supply voltage and signal output with a multimeter.

Can I drive with a faulty MAP sensor?

You can drive short distances but engine performance will be noticeably degraded. The ECU uses the MAP sensor to calculate fuel delivery - a faulty sensor causes incorrect fuelling which leads to poor economy, rough running, and increased emissions. On turbocharged engines a faulty MAP sensor can also prevent boost control from operating correctly. Replace it as soon as possible to avoid further damage.

What does a MAP sensor do?

The Manifold Absolute Pressure (MAP) sensor measures intake manifold pressure to help the ECU calculate the correct fuel and ignition timing. It is critical for engine efficiency, particularly on turbocharged and supercharged vehicles.

What are the symptoms of a faulty MAP sensor?

Symptoms include poor acceleration, rough idle, excessive fuel consumption, black smoke, engine hesitation, and a Check Engine light with codes P0105-P0109. Turbocharged vehicles may also experience boost control issues.

What is the difference between a MAP sensor and a MAF sensor?

A MAF (Mass Air Flow) sensor directly measures the mass of air entering the engine. A MAP sensor measures manifold pressure and the ECU calculates air mass from that reading. Many vehicles use one or the other; some use both. They are not interchangeable.

Identification
SKU	DTBS1001-MP258
Brand	Aftermarket OEM Replacement
Part Numbers
Part Number	DTBS1001
Reference OEM Number	8942120210
Other OEM Numbers	89421-20210, 8942120210, 079800-5130
Related Part Numbers	DTBS1001, MP258, V70-72-0389
Trade Part Numbers	FAE: 15153, VEMO: V70-72-0389, WALKER PRODUCTS: 225-1348
Product Specifics
Product Type	SENSOR
Sensor Type	Manifold Absolute Pressure (MAP) Sensor
Number of pins	3-Pin
Connector Shape	oval
Number of mounting bores	2
Compatible Makes	Toyota
Fitment Type	Direct Replacement
Other Details
Note	3-pin oval connector with 2 mounting bores - check plug